TC250, TC450, and TC650 Tension Controllers
Contents
1. Ooo oloo TENSION CONTROLLER FIGURE 2 Mounting Dimensions 3 FORM NO L 20184 A 0501 GES Naaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com CONTROL PANELS Tension O utput Indicator Indicator N Mode Switch Tension Set Point Pot Operational S tatus Indicator Lights AUTO Manual START Control Pot STOP POWER FIGURE 3 Output S witch Power Switch FRONT PANEL See Fig 3 1 TENSION INDICATOR 7 segments 4 digits with b AUTO decimal Shows automatic operation status The output is being varied to maintain a Displays actual web tension in pounds of total constant tension value at the set point tension Ce START 2 OUTPUT INDICATOR 7 segments 2 digits Shows ready to start status A stall torque output is being delivered before the Displays controller output as a percentage of total automatic operation begins Capacity Reads 0 to 99 percent No display when Output Switch is setto OFF d STOP Indicates stop status An increased STOP level output is being delivered to 3 OPERATIONAL STATUS INDICATOR LAMPS eliminate slackening of web tension when the machine is stopped Shows operation status of the controller as follows PP 5 MODE SWITCH2. 0 to 1 multiplier Thus if the desired Start Level is 50 percent of the previous output set the Manual Pot at position 5 To use the Variable Mode set Switch SW 3 8 to ON Set the Switch to OFF for Memory Mode or for standard configuration To enable the derivative logic circuit set Switch SW 4 1 to ON To disable the circuit set the Switch to OFF To use the Auto Set Point Pot set Switch SW 4 2 to ON To follow a remote signal set the Switch to OFF 1 The SetPoint Method is simplest and requires no external diameter signal The Set Point can be increased between 0 and 50 percent with the ACE L pot during acceleration or the DEC L pot during deceleration This increased Set Point value continues fora period of time as determined by the ACE T pot for acceleration or the DEC T pot for deceleration both pots have a time duration of 0 to 10 seconds This timing is initiated by a momentary contact closure at Terminals 24 and 25 for acceleration and Terminals 23 and 25 for deceleration 2 The Set Point Diameter Method is also based upon the S et Point value but is modulated as the roll changes in diameter The ACE L and DEC L pots set the maximum increase value during acceleration and deceleration this amount of FORM NO L 20184 A 0501 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442
3. 1 ZERO Calibration pot for tension sensor NO 2 ZERO Calibration pot for tension sensor NO 1 SPAN Calibration pot for tension sensor NO 2 SPAN Calibration pot for tension sensor READ OUT SELECTOR Selector switch to indicate the tension value at No 1 Sensor No 2 Sensor or the total tension on the tension indicator the controlled unit when set to the OFF position Normally set to the ON position POWER SWITCH Controls power to the Tension Controller Power Lamp illuminates when the Power S witch is set to the ON position NO 1 ZERO NO 2 ZERO NO 1 SPAN 0 ORT 1 SPAN 10 NO 2 NO 1 TOTAL 0 OP GAIN 0 I GAIN O FILTER 10 START TIMER STOP 10 0 FN STOP TIMER 0 RC TAPER 0 ZERO L FIGURE 4 FORM NO L 20184 A 0501 GES Naaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com 15 P GAIN 19 STOP Proportional GAIN Pot STOP Pot controls output during STOP cycle 16 1 GAIN 20 STOP TIMER Integral GAIN Pot Sets duration of the STOP cycle 0 to 10 seconds 17 FILTER 21 TAPER Filter Sets taper rate for taper tension control 18 START TIMER 22 ZERO L START TIMER Pot times duration of START cycle ZERO tension Level 0 to 30 of full scale INSIDE CONTROL PANEL Top Face See Fig 5 1 FP1 2 3 amp 4 Check Pins 2 OT FS Not used 3 OT BIAS No
4. 5 6 ON or lm Set Point Method ore el Set Point Diameter Method ON OFF Output Diameter Method Inertia Compensation Mode acceleration 3 4 No Compensation No Compensation Set Point Method Set Point Diameter Method Output Diameter Method Switch SW 5 1 to ON For normal immediate increase to the Stop level set Switch SW 5 1 to OFF NOTE Switches SW5 2 SW5 3 and SW 5 4 must always be set to OFF The number of items to be calibrated depends upon the configuration of the controller The minimum calibration necessary for all configurations requires setting the Full Scale Tension Value of the controller Zero Adjustment of the Tension Sensors and Span Adjustment of the Tension Sensors Other calibration steps must be performed as necessitated by the use of various optional functions selected during configuration of the controller FULL SCALE TENSION SETTING The position of the decimal point and full scale value of the Tension Indicator also the whole system is set with Switches SW1 SW2 SW 3 1 and SW 3 2 See CALIBRATION Set Full Scale Value for the System FORM NO L 20184 A 0501 12 NOTE Adjustment of Zero and Span can be impossible if the Full Scale Value of the Tension Indicator is greatly different from the tension measurement Capacity of the Tension Sensors Calculate the maximum tension measurement capacity of the Tension Sensors based on the web angle over the sensing roller an
5. Adjust No 2 Span pot until the Tension Indicator displays one half the known weight applied to the rope o NO 1 ZERO 10 o OR 2 ZERO 10 o NO 1 SPAN 10 o Olin SPAN 10 No 2 NO 1 TOTAL MTY 81 83 54 10 18 ventas industrialmagza com 7 GAIN Oi caw 10 purer 10 o START joe TIMER o STOP 0 start TIMER 10 o TAPER o ZERO L 0 oad ZERO 10 0 Oe ZERO 10 NO 1 SPAN 0 ORS SPAN 10 NO 2 NO 1 TOTAL Inside Control Board Side Face FORM NO L 20184 A 0501 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com CALIBRATION USING ONLY ONE SENSOR I Make sure that S ensor is wired correctly S ee ELECTRICAL CONNECTIONS step 3 and that the Jumper W ire is placed between Terminals 1and 5 Perform Zero Adjustment S ee CALIBRATION Zero Adjustment for No 1 Zero Itis not necessary to perform No 2 Zero Perform S pan Adjustment S ee CALIBRATION Span Adjustment Step 1 Set Selector Switch to TOTAL Adjust No 1 Span pot until the Tension Indicator displays the known weight CALIBRATION OF THE ANALOG DIAMETER INPUT NOTE This Calibration must be performed if an Analog 1 3 Diameter Input signal is being applied at Terminals 19 and 20 Set Switch SW3 6 to ON to enable the a
6. penalties delay images liquidated damages or other damages and liabilities which Buyer shall be obligated to pay or which Buyer may incur based upon related to or arising out of its contracts with its customers or other third parties In no event shall Nexen be liable for any amount of damages in excess of amounts paid by Buyer for Products or services as to which a breach of contract has been determined to exist The parties expressly agree that the price for the Products and the services was determined in consideration of the limitation on damages set forth herein and such limitation has been specifically bargained for and constitutes an agreed allocation of risk which shall survive the determination of any court of competent jurisdiction that any remedy herein fails of its essential purpose Limitation of Damages In no event shall Nexen be liable for any consequential indirect incidental or special damages of any nature whatso ever including without limitation lost profits arising from the sale or use of the Products Warranty Claim Procedures To make a claim under this warranty the claimant must give written notice of the alleged defect to whom the Product was purchased from and deliver the Product to same within one year of the date on which the alleged defect first became apparent nexen Nexen Group Inc 800 843 7445 560 Oak Grove Parkway Fax 651 286 1099 Vadnais Heights MN 55127 www nexengroup com ISO 9001 Certifie
7. Forward Control is the Normal direction when tension is too low the output increases and vice versa Reverse Control is used to control devices motor or clutch that are located before the web reaches the sensors W ith Reverse Control the output increases when tension is too high and decreases when the tension is too low SET EXTERNAL ANALOG DIAMETER INPUT SW3 6 An external analog diameter signal in the range of 0 to 10VDC can be used for Taper Tension or Stop Cycle controls SET ZERO TENSION RELAY SWITCH SW3 7 A normally open relay at Terminals 26 and 27 closes when tension falls below the value set with the Zero Tension Pot Switch SW 3 7 controls this relay Set it to OFF if the Zero Tension Relay is not needed or when performing the Zero Calibration during the load cell calibration procedure FORM NO L 20184 A 0501 10 TABLE 2 SW3 3 SW3 4 Internal OFF Forward OFF Internal ON Reverse OFF Forward ON Diameter external analog roll diameter signal and the position of the Taper Tension Pot d In all three Modes the 0 position on the Taper Pot yields no taper taper rate increases as the potis rotated toward 10 2 SetSwitches SW 3 3 and SW 3 4 to conform to the Taper Mode selected above Set Control Direction with Switch SW 3 5 ON for Forward Control and OFF for Reverse C ontrol If an external diameter input is to be used set S witc
8. cannot be made if a full scale value is set 10 to 990 that deviates greatly from the ratings of the tension sensors Set the full scale at or around the rated value of the tension sensor 100 to 1000 12 O O O O O O O O 12 EXAMPLE 1 Set the switches as follows if the full scale is set to 25 0 pounds SW 2 Setto 2 SW1 Setto 5 SW 3 1 Set to OFF SW 3 2 Set to ON EXAMPLE 2 Set the switches as follows if the full scale is set to 120 pounds SW 2 Settol SW 1 Set to 2 SW 3 1 Setto ON SW 3 2 Set to OFF 9 FORM NO L 20184 A 0501 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com SET TAPER TENSION MODE See Table 2 1 Select desired mode from the following a Internal Forward Mode Used to apply a taper tension signal to a winding clutch Taper rate is based upon internal calculations and the position of the Taper Tension Pot This is the standard Taper Tension Mode When Taper Tension is not desired use the Internal Forward Mode and set the Taper Pot to 0 b Internal Reverse Mode Used to apply a reversed taper signal to an unwind brake ona single zone machine such as a Slitter Taper rate is based upon internal calculations and the position of the Taper Tension Pot C Forward Diameter Mode Used to apply a taper tension signal to a winding clutch Taper rate is based upon an SET CONTROL DIRECTION SW3 5
9. need and can be counterproductive on internal drives such as nip rolls or s wrap drives SET POINT SELECTION SW4 2 The S etP oint ordesired tension level is normally set with the Auto Set Point Pot on the front panel The Set Point can also be set with a remote signal received at Terminals 17 and 18 INERTIA COMPENSATION MODE SW4 3 4 5 and 6 Unwind Brake Control During acceleration and deceleration of high speed machines tension in the web will often momentarily decrease as the machine transitions from acceleration to steady state speed or from steady state speed to deceleration The controller provides an inertia compensation circuit to correct this problem The inertia compensation circuit increases the Tension S et Point during the final phase of acceleration and during the initial phase of deceleration This artificially raised set point causes the output to increase during the transition phase thus eliminating the drop off in tension There are three methods of controlling the inertia compensation circuit The Start Level can also be based upon the output at the end of the previous Automatic operation This is called the Memory Mode The output at the time the Memory Relay is closed across Terminals 22 and 25 is held in memory as long as contact is maintained This memorized value is multiplied by the setting on the Manual Pot to determine the Start Level The 0 to 10 of the pot is equivalent to a
10. the position of the Mode Switch 2 Output Switch ON This switch must be turned O N to provide an output at the O utput Terminals and to provide a signal to the O utput Indicator AUTOMATIC MODE START STATUS NOTE Ifthe Controller is in Start Status the output is 3 the Start Level The Start Status Lamp comes ON 4 1 In standard configuration Start Level is controllable with the Manual Pot 5 2 The Start Level can be varied in the Variable Mode based upon an external analog diameter signal AUTOMATIC MODE AUTOMATIC STATUS NOTE When the Start Time has elapsed the Automatic 2 Mode will progress into its Automatic S tatus The Automatic Status Lamp comes ON 1 While the Controller is in Automatic S tatus the actual tension in the web as measured by the 3 Tension Sensors is constantly compared to the Tension Set Point as defined by the Auto Pot on the front panel 15 In Manual Mode all Status Lamps except Power Lamp are OFF The output of the C ontroller is varied with the Manual Pot In Automatic Model one of the Status Lamps will be ON depending on the status of the Auto Relay connected to Terminals 21 and 25 See ELECTRICAL CONNECTIONS Step 6 a Start Level can also be the memorized previous automatic control level in the Memory Mode Refer to CONFIGURATION Set Start Level Mode for Variable or Memory Mode W hen the Relay C ontacts connected to Termin
11. 0097 FORM NO L 20184 A 0501 18 GES MNaaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com FUSES Protective fuses are accessible by opening the front panel of the Controller See Fig 11 Whena fuse blows FU3 Zero Tension turn off power to the Controller and eliminate the cause Relay All models of the blown fuse then replace the fuse 2A 250V Fast Blow FU2 not used FUI Output Fuse TC250 not used TC450 0 2A 250V Fast Blow TC650 6A 250V Slow Blow Power Fuse TC 250 2A 250V S low Blow TC 450 2A 250V Slow Blow TC 650 4A 250V Slow Blow Spare Fuses FIGURE 11 TESTING 1 Remove four Screws which retain the Logic Board Shielding C over to gain access to the Test Pins used for circuit testing See Fig 12 2 Referto Figure 13 for placement of Test Pins used for circuit testing NOTE Do not confuse Test Pins CP1 through CP4 on the Display Board with Test Pins CP1 through C P20 on the Main Logic Board and Test Pin TP1 on the Main Logic Board 3 TestPins CP1 through C P4 on the Display Board are used for calibrating the Analog Diameter and FIGURE 12 External Set Point input signals See CALIBRATION Calibration of the Analog Diameter Input and Calibration of the External Set Point Test Pins 4 Use TP1 located on the Main Logic Board as CP1 CP2 COMmon for all tests except Sensor Excitation For KZE CP3 amp CP4 Sensor Excitation te
12. 1 95 72 60 ventas industrialmagza com increase is only available at Full Roll Diameter As the roll diameter decreases the amount of S et Point increase also decreases in direct proportion The time duration of the increased Set Point value is controlled by the relay that is applied to Terminals 24 and 25 for acceleration and Terminals 23 and 25 for deceleration 3 There is also the O utput Diameter Method which acts directly upon the controller output Here the output can be increased by as much as 100 percent at the Full Roll Diameter tapering off to no increase at the core The percent of increase available at the Full Roll Diameter is controlled with the ACE L pot for acceleration and the DEC L pot for deceleration S et the desired type of inertia compensation for acceleration with S witches SW 4 3 and SW 4 4 Setthe desired type of inertia compensation for deceleration with Switches SW 4 5 and SW 4 6 Refer to Table 3 for S witch settings STOP LEVEL FILTER SW5 1 Unwind Brake Control At times it is desirable to increase the output of the controller from normal to the higher level dictated by the Stop Pot on a filtered curve rather than an immediate change On slower machines this can prevent over tensioning during the transition from steady state running to the Stop Level output To achieve this filtered increase to the Stop level set CALIBRATION TABLE 3 L Inertia Compensation Mode deceleration
13. AUTOMATIC MODE STOP STATUS W hen the relay contacts connected to Terminals 21 and 25 are opened the Controller enters its Stop Status The Stop Status Lamp comes ON 1 The output of the C ontroller increases to the Stop Level as determined by the Stop pot on the side panel The Stop Level is based upon the output of the Controller at the time the relay contacts are opened The Stop Pot controls the amount of increased output needed to decelerate the unwind roll to zero speed without causing slackness in the web tension 2 The O to 10 span of the Stop Pot controls the multiple applied to the output The multiple varies in a range of 1 times output at 0 to 3 times output at 10 Set the Stop Pot to decelerate the web smoothly without losing tension Too much output increase will raise the tension level above the desired level A position of 3 about 1 5 times increase is a good starting value PROBLEMS DURING TEST RUN Most problems are the result of incorrect installation of the components or miswiring Recheck the following points 1 Is the Tension Sensor correctly sized for both the tension induced load and the tare weight of the sensing roller and bearings See TENSION SENSOR SPECIFICATIONS 2 Are Tension Sensors installed correctly Refer to Maintenance Manual L 20127 PROBLEM Impossible to Achieve Zero Adjustment 1 Is the Tare W eight The combined weight of the s
14. GEES Naaza M MEX 55 53 63 2331 MTY 81 e3 54 10 18 EEX DIST AUTORIZADO QRO 442 1957260 ventas industrialmagza com nexen WEB CONTROL PRODUCTS User Manual 29292 TC250 TC450 and TC650 FORM NO L 20184 A 0501 GES MNaaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com In accordance with Nexen s established policy of constant product improvement the specifications contained in this manual are subject to change without notice Technical data listed in this manual are based on the latest information available at the time of printing and are also subject to change without notice Technical S upport 800 843 7445 651 484 5900 WWww nexengroup com WARNING Read this manual carefully before installation and operation Follow Nexen s instructions and integrate this unit into your system with care This unit should be installed operated and maintained by qualified personnel ONLY Improper installation can damage your system or cause injury or death Comply with all applicable codes Nexen Group Inc 560 Oak Grove Parkway Vadnais Heights Minnesota 55127 Copyright 2000 Nexen Group Inc ISO 9001 Certified ii GES Naaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com TABLE OF CONTENTS Introduction 4 4 nnnnnn nnn nnnnnnnncnnnnnannnnnnnnnnnnannnnnan
15. IES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED This warranty applies only if a the Product has been installed used and maintained in accordance with any applicable Nexen installation or maintenance manual for the Product b the alleged defect is not attributable to normal wear and tear c the Product has not been altered misused or used for purposes other than those for which it was intended and d Buyer has given written notice of the alleged defect to Nexen and delivered the allegedly defective Product to Nexen within one year of the date of shipment Exclusive Remedy The exclusive remedy of the Buyer for any breach of the warranties set out above will be at the sole discretion of Nexen a repair or replacement with new serviceably used or reconditioned Product or issuance of credit in the amount of the purchase price paid to Nexen by the Buyer for the Products Limitation of Nexen s Liability TO THE EXTENT PERMITTED BY LAW NEXEN SHALL HAVE NO LIABILITY TO BUYER OR ANY OTHER PERSON FOR INCIDENTAL DAMAGES SPECIAL DAMAGES CONSEQUENTIAL DAMAGES OR OTHER DAMAGES OF ANY KIND OR NATURE WHATSOEVER WHETHER ARISING OUT OF BREACH OF WARRANTY OR OTHER BREACH OF CONTRACT NEGLIGENCE OR OTHER TORT OR OTHERWISE EVEN IF NEXEN SHALL HAVE BEEN ADVISED OF THE POSSIBILITY OR LIKELIHOOD OF SUCH POTENTIALLOSS OR DAMAGE Forall of the purposes hereof the term consequential damages shall include lost profits
16. IST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com INTRODUCTION Read this manual carefully making full use of its explanations and instructions The Know How of safe continuous trouble free operation depends on the degree of your understanding of the system and your willingness to keep all components in proper operating condition Pay particular attention to all NOTES CAUTIONS and WARNINGS to avoid the risk of personal injury or property damage It is important to understand that these NOTES CAUTIONS and WARNINGS are not exhaustive Nexen cannot possibly know or evaluate all conceivable methods in which service may be performed or the possible hazardous consequences of each method Accordingly anyone who uses a procedure that is not recommended by Nexen must first satisfy themselves that neither their safety or the safety of the product will be jeopardized by the service method selected The 50 Series Tension C ontrollers use digital logic to maintain constant tension Digital logic is used rather than the more conventional analog to allow trim adjustment of many control factors These Controllers receive an input signal from a tension sensor and compare it with a desired or set tension level The difference between the sensed and set signals is called deviation These controllers reduce the deviation to zero by increasing or decreasing their output signal The sensed input signal is generated by two Nexen N
17. a POWER Lights when the Power Switch is ON Selects Automatic or Manual O peration Mode NOTE The following lamps are used only 6 TENSION SET POINT POT when the MODE Switch located on the front panel is set to AUTO Used when the Mode Switch is set to AUTO Sets W hen the switch is set to MAN the desired tension value One graduation on the all lamps except the POWER lamp pot equals 10 percent of the full scale value of the go off Tension Indicator FORM NO L 20184 A 0501 4 7 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com MANUALCONTROLPOT Sets output manually during operation in the M anual Mode Itis used for setting the START output value during operation in the Automatic Mode OUTPUT SWITCH Allows the output to be totally disconnected from INSIDE CONTROL PANEL Side Face See Fig 4 Left Hand Side 1 DEC T DECeleration Timer 0 to 10 seconds DEC L Inertia compensation Level for DECeleration ACE T ACCeleration Timer 0 to 10 seconds ACE L Inertia compensation Level for AC Celeration DDW Broken line deviation width 0 to 10 of full scale DDG Broken line gain variable from x 0 to x 1 0 PAS T Not used PAS L Not used STOP MIN Sets MINimum STOP output value 0 to 30 Prevent Stop output from dropping too low Right Hand Side 10 11 12 13 14 NO
18. als 21 and 25 are closed the time set on the S tart Timer begins If actual tension is not equal to the S et Point tension the Controller will vary its output to the clutch brake or drive it controls to cause the actual tension to become equal to the set point The Set Point tension can be adjusted any time while controlling in the Automatic Mode output will change to follow the new set point FORM NO L 20184 A 0501 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com Response speed or sensitivity of the C ontroller can be adjusted with the G ain Controls Gain should always be adjusted while the web is moving at normal processing speeds as increases in response speed can be accompanied by a decrease in control stability Control instability or hunting occurs when the output of the Controller will not settle down and the reading on the Tension Indicator wanders Four common causes for hunting are a Incorrect gain adjustment of the Tension Controller b Excess brake clutch or drive capacity c Eccentricity of the unwind roll d Excessive mechanical friction in the machine components Decreasing the Proportional G ain adjustment can help with all these problems W ith Items b c and d if hunting cannot be eliminated with the gain controls correction of the mechanical problem is required Proportional G ain is controlled wi
19. d FORM NO L 20184 A 0501 26
20. d the force capacity See TENSION SENSOR SPECIFICATIONS for the model Tension Sensor being used INDUSTRIAL MEX 55 53 63 23 31 DIST AUTORIZADO QRO 442 1 95 72 60 ZERO ADJUSTMENT See Fig 9 1 Set Power Switch to ON 2 Make sure Sensor Roll is mounted to MB Sensors as described in MB Sensor Manual L 20127 3 Make sure the web has been removed and no other objects are sitting or leaning on Sensor Roll 4 SetSwitch SW 3 7 to OFF 5 SetSelector Switch to I 6 Adjust No 1 Zero pot until Tension Indicator displays 0 7 SetSelector Switch to 2 8 Adjust No 2 Zero pot until Tension Indicator displays 0 9 SetSelector Switch to TOTAL Tension Indicator should still display 0 10 Set Switch SW 3 7 to ON if Zero Tension C ircuit is needed NOTE Tension Indicator will not display negative numbers therefore be careful when adjusting Zero Pot to prevent overshooting SPAN ADJ USTMENT 1 Thread a rope or narrow web over the Sensor Roll in the normal web path Secure one end of the rope Insure that the rope is at the center of the Sensor roll Hang a known weight within the Full Scale range of the system on the other end of the rope See Fig 10 2 SetSelector Switch to No 1 3 Adjust No 1 Span pot until the Tension Indicator displays one half the known weight applied to the rope 4 Setthe Selector Switch to No 2 5
21. dded signal is then compared to the Target value each MB Tension Sensor These signals are 0 400 mV which is set with the Set Point Pot located on the front Each signal is amplified and the amplified signals are panel of the controller Any difference deviation added The added signal 0 LOVDC is displayed at the between the added signal and set point is transmitted to tension indicator on the front panel of the controller as a the logic section total tension reading The tension being sensed by either sensor also may be indicated on this indicator by using the selector switch located inside the controller door THE LOGIC SECTION The logic section drives the deviation to zero by perfor 5 Taper Tension control also can be programmed in ming the following actions both forward and reverse modes and based upon internal calculations or an external roll diameter 1 Proportional P control prevents overshooting when signal the error is removed by integral control 6 An initial output during acceleration can be set and 2 Integral 1 control determines if there is a deviation timed This Start signal can be a fixed value or and acts to increase or decrease the output to vary as the roll diameter changes The Start correct the deviation function can be timed to last up to ten seconds after the machine starts 3 Foruse with winding or unwinding controls there is also a Derivative D control available T
22. e the Manual Pot is held in one position and the output does not vary Check the operation in Auto Mode SEE D 21 FORM NO L 20184 A 0501 GES Naacza MEX 55 53 63 2331 MTY 81 83 54 10 18 Sw DIST AUTORIZADO QRO 442 1 95 7260 ventas industrialmagza com Check the Power Supply Unit Determine if the Power Supply NO Voltage iaag e is set to the Set to the correct value AC voltage being supplied See Electrical Connections YES Check if the AC Power Supply NO RP voltage is within the tolerance Supply power within the tolerance or 10 YES NO Determine the cause correct it Make sure that the Power Fuse and replace the blown fuse with has not been blown the correct size replacement fuse See Maintenance and Testing Fuses YES Check if the two cords and one flat ribbon cable used for connection between the Power NO Supply Board and the Main Board are correctly inserted into connectors Insert correctly YES Trouble with the Power Supply Board FORM NO L 20184 A 0501 22 GES Naacza MEX 55 53 63 2331 MTY 81 83 54 10 18 SY DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com Check the Tension Sensor Unit Determine if Zero Adjust NO ment can be made YES YES Unsuitable pillow block mounting position Sensor roll weight is Check if the Sensor s Load Plate is in contact with the side wall outside of
23. ensing roller and bearings too great for the Tension Sensor being used See TENSION SENSOR SPECIFICATIONS 2 The Tension Sensor will not return to a display of 0 when all force is removed The Tension Sensor is not mounted to a flat surface ora side loading force has been applied to the Sensors Check mounting instructions in Maintenance Manual L 20127 provided with the Sensors gt The Stop Timer Pot determines the length of time the Stop Level output is applied to the brake The O to 10 span of the Stop Timer Pot is equal to 0 to 10 seconds For midprocess control or wind up control the Stop and Stop Timer Pots are always set to 0 W hen the time on the Stop Timer Pot has elapsed the Stop Status Lamp will go OUT and the S tart Status Lamp will come ON indicating the Controller is ready to begin the cycle again Is the brake clutch or drive being controlled sized correctly Refer to Manufacturers Specifications Are external electrical connections correct See ELECTRICAL CONNECTIONS Is the relay contact needed for control of the Automatic Mode wired to the Controller and correctly timed See ELECTRICAL CONNEC TIONS Step 6 Is the Power Supply Jumper set to the correct terminals for the AC power being provided See ELECTRICAL CONNECTIONS Disconnect the cables from the Tension Sensors and from Terminals 1 through 8 Check voltage at Terminals 3 and 4 and at Termi
24. f CP1 and CP4 on the Display B oard Adjust EST FS pot so that voltage between CPI and CP4 is 5VDC INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com TEST RUN After completing the C onfiguration and Calibration a Test Run should be performed Make the Test Run with the lowest tension web to be used innormaloperation The lowerthe tension in the web the more sensitive it will be to system stability If satisfactory controlis achieved with a low tension web there should be no problem with high tension webs NOTE Prior to making the Test Run check the following 1 Ensure that no wires cables or air lines are in contact with the web or rotating parts of the machine 2 Check that all rotaing parts of the machine move freely that there is no mechanical binding or excess rotational friction 3 Recheckall electrical connections 4 Make sure Voltage Select Jumper is set to the correct AC supply voltage level See Electrical Connections Fig 8 5 lf using the TC 250 with the EN 40 Electro Pneumatic Converter make sure air system is correctly installed See Manual L 20127 POWER ON NOTE When the Power is ON the Tension Indicator 3 on the front panel displays the actual web tension as measured by the Tension Sensors 1 When the power is turned ON the Automatic or 4 Manual Mode is activated depending on
25. h SW 3 6 to ON If no external diameter signal is to be used set the Switch to OFF Set Switch SW 3 7 to ON when the Zero Tension Relay is needed after the zeroing phase of load cell calibration has been completed Set the Switch to OFF if the Zero Tension Relay is not needed INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com SET START LEVEL MODE SW3 8 The output delivered during the S tart phase of the Automatic Control Mode is called the Start Level Start Level can be controlled in one of three ways In standard configuration the S tart Level is set with the Manual Pot on the front panel The Start Level can be adjusted any time the Controller is in Start Mode and the Start Status lamp is ON The Start Level can also be varied based upon an input from an external analog diameter signal see Set External Analog Diameter Input above In this mode the Start Level varies as the roll diameter changes this is called the Variable Mode The Manual Pot is used to set the Start Level output at the maximum roll diameter and the external analog diameter signal is used to decrease the output at smaller diameters ENABLE CONSTANT LOOP GAIN SW4 1 A derivative logic circuit is provided to maintain a constant gain in the control loop as the roll diameter changes on winding or unwinding operations This circuit is not
26. he trigger point from 0 to 10 percent of Full Scale on the Tension Indicator EXAMPLE If DDW is set for 5 a deviation of more than 5 percent of Full Scale between actual and set point tension will activate the Deviation Detection Circuit Set the DDW pot to position 5 as a starting value The increase in Proportional Gain caused by the activation of the Deviation Detection C ircuit is controlled with the DDG pot The starting value for the DDG potis 10 maximum To set a desired increase rate set the DDG pot for the inverse of the desired magnification of the Proportional G ain EXAMPLE To apply a Proportional G ain that is twice the normal Proportional G ain whenever the Deviation becomes more than 5 percent of Full Scale a Set DDW to graduation 5 sets the trigger point at 5 percent b Set DDG to graduation 5 the inverse of 2 is 5 The Filter pot located on the side panel controls minor low frequency fluctuations in tension which cause constant changes in the Tension Indicator reading Set the Filter pot to 5 as a starting level To increase the suppression of the transient readings advance the pot toward 10 to increase the Tension Indicator sensitivity decrease the setting toward 0 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com
27. his 7 For unwinding application there is also a Stop maintains a constant loop gain as the wind or function which allows the output to be increased unwind roll constantly changes diameter during a machine stop to counteract roll inertia and prevent run on slack web or web spillage The 4 Inertia compensation also can be programmed in for Stop function also can be timed for up to ten acceleration deceleration or both seconds FORM NO L 20184 A 0501 2 GES Naacza MEX 55 53 63 2331 MTY 81 83 54 10 18 AY DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com THE OUTPUT AMPLIFIER The output amplifier receives the signal from the PI section and amplifies it to the correct output signal level This output level is shown on the indicator located on the front panel INSTALLATION 1 Forwall mounting remove mounting feet from the controller base then remove the rubber pads and reinstall the mounting feet in the rear mounting holes on the sides of the controller WARNING This unit is an electronic instrument and should not be mounted where it will be subjected to shock vibration excessive heat 2 For panel mounting the same feet may be used as or moisture above only installed in the forward mounting holes on the sides of the controller The controller can be shelf or floor mounted using the mounting feet installed on the controller NOTE The controller may be mounted at any angle
28. ip Switch determines control basis for S tart Level output 9 SW4 1 Sip switch enables disables derivation calculation in the control logic 10 SW 4 2 Dip switch selects either internal or external origin for Set Point Signal 11 SW 4 3 4 5 amp 6 Dip switches to determine the use of inertia compensation during acceleration deceleration and the basis for the correction 12 SW5 1 Dip switch allows instant transition to Stop Level output or a gradual transition 13 Sw5 2 3 amp 4 Dip switches which are not used Must always be set to O FF FORM NO L 20184 A 0501 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com ELECTRICAL CONNECTIONS Controller ST GN Aut Tension H ESI ensor Ro I No 2 Decele Accele External Set Point Power Supply 10V Contact Input Zero tension relay output Control Output Ground E Power Supply Tension Readout 0 to 10V External Set Point Pot 10 FIGURE 7 NOTE Always set the Power Supply Selector to the 1 2 power supply voltage used before making electrical connections Power supply is factory set to 240VAC Do not use a power voltage that is greater than plus or minus 10 See Fig 8 CAUTION The sensor signal line and the control signal line of the Controller and related equipment use weak electrical signals To prevent signal interference and cross ta
29. ireco MB Tension Sensors Sensing narrow webs or wire may be done with one Nexen Nireco Tension Sensor Two Sensors are normally used to provide sensing at both ends of a sensor roll This eliminates any error caused by a difference in tension from one side of the web to the other The output signal of the tension control depends on the model number TC 250 has a 4 20mA output This Signal is used with the Nexen Nireco Electro P neumatic Convertor It varies its output air pressure in direct relation to the variable input signal from the TC 250 This output air pressure can be used to actuate a pneumatic clutch brake or motor Output from TC 650 is 24VDC 0 6A This signal is compatible with 24V electro magnetic clutches and brakes TC 450 provides a 0 10VDC output signal to interface with variable speed motors FORM NO L 20184 A 0501 GES Naaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com CONTROLLER OPERATION Automatic control operation can be broken down into three parts See Fig 1 Tension Indicator No 1 No 1 PI Tension Amplifier Control Sensor Section Amplifier No Nao Section Tension Amplifier Sensor Exponential Operation Output Percent Indicator Current Amplification Manual Control FIGURE 1 THE SIGNAL ADDER SECTION The signal adder section receives the input signal from The a
30. ists product ITEM DESCRIPTION P N price lists unit assembly drawings bills of materials and instruction manuals Power Supply PC Board TC250 Power Supply PC Board TC450 Power Supply PC Board TC650 Main PC Board A All Models W hen ordering replacement parts specify model designation item number part description and quantity Purchase replacement parts through your local Nexen Distributor Display Board B All models Auto Set Point Pot All Models Manual Control Pot All Models Mode Switch All Models Power Switch All Models Output Switch All Models COIN OR WOM A F TENSION SENSOR SPECIFICATIONS Product Number 912609 x0 onon se 911996 911999 911889 012000 911998 O temesi MBO5B MBO5A MB11B MB11A MB25B MB25A MB33B MB33A MB41 Load Range Per Sensor 22lb 44lb 22lb 44lb 110lb 220lb 660lb 1100lb 2200lb Load Range Per Sensor 10kg 20kg 10kg 20kg 50kg 100kg 300kg 500kg 1000kg 11lb 22lb 11lb 22lb 551b 110lb 230lb 385lb 770lb 25 FORM NO L 20184 A 0501 GEES MNaaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com WARRANTIES Warranties Nexen warrants that the Products will be free from any defects in material or workmanship for a period of 12 months from the date of shipment NEXEN MAKES NO OTHER WARRANTY EXPRESS OR IMPLIED AND ALL IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION IMPLIED WARRANT
31. lk arrange wiring as far from strong electrical circuits as possible or shield the signal lines or run signal in conduit Use crimp style terminals with insula tion for connecting wires to the terminal block Use 3mm screws for external connections Use cable provided with the MB Tension Sensor to connect sensors to the Controller See Fig 7 NOTE Reverse GREEN and YELLOW wire when using MB 11 and MB 25 with reverse wrap For single sensor operation connect as normal for sensor No 1 and provide a jum per wire to short terminals No 1 and No 5 W ire External S et Point Pot if used using Terminals 10 17 and 18 See Fig 7 FORM NO L 20184 A 0501 FIGURE 8 Control Output at Terminals 11 and 12 varies according to the model TC 250 output is 420 milliamps TC 450 output is 0 10 VDC and TC 650 output is 0 24VDC The Tension Readout Signal varies with the Tension Indicator reading where 0 to 10VDC is equal to 0 to Maximum full scale readout If an external analog signal is used it is wired to Terminals 21 and 25 External contacts wired to Terminals 21 through 25 must be electrically isolated or use dry contacts to prevent ground loops a The Auto Relay closes to begin the Start Time W hen the Start Time elapses the Controller begins Automatic C ontrol W hen the Auto Relay opens the Automatic C ontrol ends and the Stop Time begins After the Stop Time elapses the Controller ret
32. nalog input circuitry Set Analog Diameter Input Signal at the maximum diameter value approximately 10V Adjust DIA FS pot so that voltage measured between CP2 and CP4 is 5VDC See MAINTENANCE AND TESTING Testing for location of CP2 through CP4 on the Display Board CALIB RATION OF THE EXTERNAL SET POINT NOTE If an External Set Point signal is being applied to 1 Terminals 17 and 18 the following calibrations must be performed Set Switch SW4 2 to OFF to enable the external set point circuitry FORM NO L 20184 A 0501 14 NOTE Itis not necessary to perform No 2 Span NOTE This completes the basic calibration of the Tension Controller The following calibration techniques are necessary only if special functions have been selected during configuration All of these calibration techniques are performed using the Pots and Check Pins CP located on the Top Face of the Inside Control Panel See CONTROL PANELS Inside Control Panel Fig 5 Set Analog Diameter Input Signal to the core diameter value Adjust D MIN pot so that voltage measured between CP3 and CP4 is OVDC Set Analog Diameter Input Signal at the maximum diameter value Adjust TAP FS pot so that voltage measured between CP3 and CP4 is 5VDC Set the External Set Point signal to its maximum value approximately LOVDC See MAINTENANCE AND TESTING Testing for location o
33. nals 7 and 8 Correct voltage is approximately 6VDC fluctuating If the voltage varies radically from 6VDC the C ontroller is defective Short across Terminals 1 and 2 and across Terminals 5 and 6 Attempt to achieve Zero Adjustment If adjustment can be made the Tension Sensor is defective If the adjustment cannot be made or if the Zero Adjustment Pot is near the high or low limit of its range the Controller is defective Reconnect cables to the Tension Sensor and to Terminals 1 through 8 FORM NO L 20184 A 0501 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com PROBLEM Impossible to Achieve S pan Adjustment 1 Ifthe Tension Indicator varies proportionately to If the Tension Indicator display is less than the tension changes but Span Adjustment cannot be applied tension and the Span Adjustment Pot is set made the Tension Sensor is sized incorrectly or the at maximum The Tension Sensor is oversized or the wrap angle is too acute See TENSION SENSOR Tension Sensor is defective SPECIFICATIONS 2 Ifthe Tension Indicator displays the maximum full scale value when a force less than the maximum is applied to the sensing roll and the S pan Adjustment Pot for that Sensor is at minimum setting The Tension Sensor is undersized or the Sensor is defective PROBLEM Abnormal Output Signals 1 No output in the Manual Mode when the Manual Co
34. nnnnannanccananananmannannnnnnnnnnns 1 Controller O peration 2 installation 7 7 777 aana 3 Control Panels 7 7 777 7 77 7421 4 Electrical Connections 8 Configuration 9 Calibration 2 4 7 2 12 Test RUN 4 4 7 4 7 4 4 7 4724 cna nnncnnnnnnnmnann anes 15 Maintenance and Testing 18 Troubleshooting 21 Replacement P arts 25 Tension Sensor Specifications 25 Warranties 24777 4771ean 26 iii INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 D
35. ntrol Potis rotated from minimum to maximum and back Output becomes maximum or minimum when the web is removed or when the machine is stopped and the Auto lamp remains lit Defective relay contacts or timing of the relay connected to a The output wires are misconnected Terminals 21 and 25 See TEST RUN Power On Automatic Mode Start Status and Automatic b The output fuse is blown TC 250 does not Mode Automatic Status have an O utput Fuse O utput varies from maximum to minimum and c O pen circuit in the output connection of Tension Indicator also varies without stabilizing at TC250 the Set Point Value G ain improperly adjusted or the controlled element clutch brake or drive is not d O utput S witch in OFF position correctly sized See TEST RUN Automatic Mode MAINTENANCE AND TESTING MAINTE NANCE Automatic Status Steps 4 through 10 for proper G ain Adjustment and Manufacturers Specifications for correct sizing of the controlled element NOTE For further testing of controllers described as defective above refer to TROUBLE SHOOTING provided with the unit Operating elements brakes clutches motors etc must be maintained in accordance with the manufacturer s specifications There is no required maintenance as the Controller has no parts subject to mechanical wear Proper care must be taken to insure clean air for the EN 40 Electro Pneumatic convertor as outlined in Manual L 2
36. st CP11 against CP12 p TP1 COM Test Pins CP1 through CP20 Main Logic B oard FIGURE 13 19 FORM NO L 20184 A 0501 GES Naaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com TABLE 4 Test Pin Values Main Logic Board OOOO pee p oo SIGNAL LINE Tension at No 1 Sensor CP1 and CP2 should both indicate half of Test Load Value TLV Test Load W eight LB Tension at No 2 Sensor Analog Diameter 5V with the Max Dia Input OV with the Min Dia Input C C a FORM NO L 20184 A 0501 20 GSS Naaza MEX 55 53 63 2331 MTY 81 83 54 10 18 BZ DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com TROUBLESHOOTING ISOLATE SECTION WHICH IS CAUSING THE PROBLEM Check if the DC Power Supply voltages are normal a Check the voltages at the Check the Power Supply Circuit Power Supply Check Terminals See Maintenance and Testing Testing g g SEE A Check if the Tension Indicator reacts normally when a load is applied to and removed from Check the Tension Sensor Unit the Sensor Roll SEE B Check if operation in Manual Mode is normal Check if the output varies following rotation of the Check output and Manual Pot Brake Clutch Drive Check if the Output holds ien steady when the Manual SEE C Pot is held in one position Check if the Tension Indicator reading holds steady whil
37. t used 4 EST FS External Signal Trim Pot Full Scale used to trim the signal from an external analog diameter source 5 D MIN MINimum Diameter pot used to trim the signal from an external analog diameter source FP 4 COM FP 3 FP 2 FP 1 6 TAP FS TAPer circuit trim pot Full Scale used to trim the signal from an external analog diameter source 7 DIA FS DlAmeter trim pot Full Scale used to trim the signal from an external analog diameter source OT FS OT BIAS EST FS FIGURE 5 FORM NO L 20184 A 0501 6 ecto T NAGZA MEX 65 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com CONFIGURATION SWITCHES Main PC Board A See Fig 6 1 SW1 Rotary switch for setting the second digit of the Full Scale Range of the Tension Indicator 2 SW2 Rotary switch for setting the first digit of the Full Scale Range of the Tension Indicator 3 SW3 1 and 2 Dip switches used to set the decimal point position on the Tension Indicator 4 SW 3 3 and 4 Dip switches used to define the taper tension mode Configuration switches on the main board 5 SW3 5 Dip switch used to determine controller correction logic 6 SW3 6 Dip switch used to select use of an external analog diameter signal 7 SW3 7 l oe FIGURE 6 Dip switch activates Zero Tension circuitry web break detection 8 SW3 8 D
38. th the P GAIN pot on the side panel Set the Proportional G ain to position 5 as a starting value Increase the gain toward 10 if the Controller is reacting too slowly to maintain constant tension Decrease the gain toward 0 if the controller is overreacting and correcting too fast to maintain stability Integral G ain is controlled with the I GAIN pot on the side panel S et the Integral G ain to position 5 as a Starting value The I GAIN pot is generally set at the same value as the P GAIN pot Response speed is increased by advancing the pot toward 10 and decreased by retarding toward 0 On high speed machines during the transition from acceleration to steady state running and from steady state running to deceleration the inertia of the unwind roll can cause a temporary decrease in tension Most this problem can be corrected through use of the Inertia Compensation Circuitry See CONTROL PANELS Configuration S witches FORM NO L 20184 A 0501 16 10 Any residual instability or tension lag can be corrected with the Deviation Detection Circuit This circuit senses large scale deviations between actual and set point tension then increases the correction rate to remove the deviation faster The magnitude of deviation that will enable the Deviation Detection Circuit is controlled with the DDW pot on the side panel The movement of the pot from 0 to 10 varies t
39. the rating Defective Sensor Check if the voltage between Terminals 2 and COM changes when No 1 ZERO adjustment VR is NO turned Check if the voltage Defective zero between Terminals 6 and COM adjustment circuit changes when No 2 ZERO adjustment VR is turned Check if the voltage between Terminals 1 and COM and 5 and COM becomes zero when No 1 ZERO adjustment and No 2 ZERO adjustment are turned respectively Sensor roll weight is outside of the rating Defective Sensor lt V Check if Span adjust NO ment can be made YES The working force is small relative to Sen sor s load rating Unsuitable wrap angle Defective Sensor Check if voltage that corres ponds to the tension value is generated between Terminals 4 and 2 or 5 and 6 YES Check if a voltage that corres NO ponds to the tension value is generated at CP1 and CP2 The span circuit is defective V YES Check if the tension Y gt Defective Controller reading returns to zero when the tension is reduced to zero YES There is no trouble Check if the Sensor NO in the Tension Roll and Sensor are Sensor Unit mounted as specified Mount them as specified YES Defective Sensor 23 FORM NO L 20184 A 0501 GES Naacza MEX 55 53 63 2331 MTY 81 83 54 10 18 Sw DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com Check output and brake clutch dri
40. urns to the Start output and is ready to Restart b The Memory Relay causes the memory to store the output value present at the time the relay closes This relay should be timed to make contact just as the Auto Relay is opened and must remain open until after the Controller returns to Start S tatus C The Deceleration Relay enables the deceleration circuitry The deceleration circuit remains enabled as long as the Deceleration Relay is held closed GES Naaza MEX 55 53 63 2331 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com d The Acceleration Relay enables the 7 Connect AC Power at 100 110 120 200 220 or acceleration circuitry The acceleration 240VAC either 50 or 60 Hertz to Terminals 29 and circuit remains enabled as long as the 30 with Earth Ground to Terminal 28 Acceleration Relay is held closed WARNING 6 The Zero Tension Relay is rated at 30VDC 0 2A or 250VAC 0 2A Jumper wire must be properly positioned for power supplied CONFIGURATION SET FULL SCALE VALUE FOR THE SYSTEM SW3 1 TABLE 1 and 2 1 Using Switches SW 3 1 and SW 3 2 set decimal FULL SCALE position S ee Table 1 2 Using Switch SW 2 set the first significant digit of 0 10 to 9 90 a the Full Scale Value Any value 1through 9 3 Using Switch SW 1 set the second significant digit of the Full Scale Value Any value 1 through 9 1 0 to 99 0 NOTE Zero adjustment and span adjustment
41. ve In the Manual Mode check if the output changes from 0 to 100 as MAN Control Pot is turned YES y NO Is the output switch set to ON Set it to ON YES Is the output protective fuse normal NO Remove the cause of the blown fuse Output not fused on TC250 YES Model TC250 only Is there a resistance of Connect to EN40 or suitable checking approx 4000 across the output resistor Devective Controller YES Check if a large fluctuation occurs in the tension value when controller is in Manual Mode with a fixed output i gt Check if the rated torque NO Make selection of the selection of the Brake Clutch Brake Drive again Clutch Drive is suitable Do not apply a large service factor A A YES Check if major mechanical imi backlash is present in gt t Eliminate the backlash the machine Check if a mechanical loss is YES involved Tension is generated D Eliminate the mechanical loss with the output value zero NO Check if drive side is stable Check the drive motor and mechanisms on the drive side lt YES There is no trouble between Control output and Clutch Brake Drive FORM NO L 20184 A 0501 24 GSS Naaza MEX 55 53 63 2331 MTY 81 83 54 10 18 Se DIST AUTORIZADO QRO 442 1 95 7260 ventas industrialmagza com REPLACEMENT PARTS The item or balloon number for all Nexen products is used for part identification on all product parts l
Download Pdf Manuals
Related Search