TC240, TC440, and TC640 Tension Controllers
Contents
1. A 14 iii INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventasQindustrialmagza 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 NO TES 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 THEORY OF OPERATION Tension Controllers receive an input signal from each tension sensor and compare it with a desired or set tension level The difference between the sensed and set signals is called deviation Tension Controllers reduce the deviation to zero by increasing or decreasing their output signal The sensed input signal is generated by two Nexen MB Tensi2. ee ee oe o eee QQ n n rene e n nn rene nn n nnne n n n rre een n nnn 1 Theory of O peration 1 q pYJ JJJJ JqJJ JJJJJJJTJJJJ JJJJqJJJ JJJ J JJJqJ3 2 installation 2 Electrical C onnections eee e c n rere e e eren nn nn rene nn n rr 3 Pneumatic C irc uit eee 4 Calibration 4 TUNING ssa 6 Jumper Selection 8 Test RUN T Q 8 perating Procedure q s 33 pJJq TTJ mJJJ s JJ q qqU J T 9 System Instability and C orrective Action 9 Maintenance O na 10 Check Pin Values cereo e n rere nn ne ree n n n ree n n ne re e 10 Mounting Dimensions 12 Replacement P arts J JJJ J Jq TJJJJ j J qIJ q 13 Parts List 13 Warranties
3. 1 Forunwind and mid process control the TAPER pot must be set to 0 2 Itis often necessary to have tapered tension more tension at the start of rewind gradually decreasing as the roll builds up to prevent telescoping Ina rewind application the output signal from the Tension Controller gradually increases as the roll diameter increases Taper is achieved in the control system by automatically increasing the output to less than normal FORM NO L 20120 E 0701 Start torque stall torque can be changed with the START pot See Figure 7 Normally this torque is set so that the roll will not unwind due to web sag while the machine is standing idle The time delay after the machine start button has been pushed until the Tension Controller goes from START to AUTO can be controlled from the START TIME pot and can be set from 1 10 seconds For rewind and midrange control the START and START TIME pots are normally set to zero See Figure 7 START SIGNAL GIVEN TO MACHINE AND TENSION CONTROLLER ADJUST WITH ADJUST WITH START TIMER STOP POT ADJUST WITH y STOP TIMER STO START STATIONARY MOVING BRAKING STATIONARY FIGURE 11 The TAPER pot adjustment can be found through experimentation by running a roll at 0 on the TAPER pot to give a constant tension wound roll then gradually increase the TAPER pot setting on subsequent rolls until an acceptable roll is formed NOTE The taper tension circuit is desig
4. The Tension Controller will repeat the sequence operation SYSTEM INSTABILITY AND CORRECTIVE ACTION The sytem may generate hunting in the AUTO Mode due to the following conditions High friction loss in the machine rolls hard to move etc Brake torque capacity too great Adjust the MAN pot to obtain the same output signal as when in AUTO Mode If the Tension Indicator still oscillates in MAN Mode the mechanical loss in the machine is too high Tension is properly controlled in AUTO Mode from the beginning of unwind O D of roll until about mid roll This control is achieved with very low output on the O utput Meter C heck the bearings guide roll alignment etc Reduce torque capacity of the brake by installing a friction facing with a lower coefficient of friction or reducing the number of actuators used if multiple actuator brakes are used At approximately mid roll tension becomes unstable and output oscillates from a zero to positive output and back to a zero output Set the MAN pot to low output Set the Mode Switch to MAN and attempt to maintain tension as read on the Tension Indicator at Set Point Brake torque capacity is too great if it is impossible to maintain set point tension with very little movement of the MAN pot O bserve out of round condition of the unwind roll Loping of the roll may be observed on the Tension Indicator The O utput Meter will also show the system s constant re
5. on the Tension Controller For wall mounting remove the mounting feet from the Tension Controller base then remove the rubber pads and reinstall the mounting feet in the rear mounting holes on the Tension Controller sides For panel mounting the same feet may be used as above only installed in the forward holes on the Tension Controller FORM NO L 20120 E 0701 GES gt MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventasQindustrialmagza com ELECTRICAL CONNECTIONS 1 Use cables provided with the MB Tension Sensor to connect the MB Tension Sensors to the Tension Controller See Figure 2 No 1 Tension NOTE Reverse the GREEN and YELLOW or Sensor W HITE wires when using MB 05 MB 11 and MB 25 with reverse wrap For single sensor operation connect as normal for Sensor No 1 and provide a jumper wire to No 2 Tension short Terminals 5 and 6 Sensor 2 Connect the output terminals to the controlled device with two conductor 18 AW shielded cable See Figure 3 FIGURE 2 3 Start and Stop Terminals 16 17 and 18 must be connected with customer supplied switches Choose either momentary or maintained normally open N O contact This switching is normally ER interfaced with the circuitry which starts and stops the flow of material through the process Depending on the type of switching used the SEQ Switch on Momeniary Cer E o Maintained the Tension Controller must be m
6. tension the more sensitive the web will be to system stability If low tension control is successful there will not be any trouble with higher tension settings CAUTION Prior to making the test run perform the following checks Be sure that no wires cables or air lines are in contact with rotating parts of the machine All mechanical parts of the machine must move freely without rotational friction Recheck all electrical connections Check the air supply to the Electro Pneumatic Converter 1 Setthe Mode Switch to MAN 2 Adjustthe Manual Control pot to a low output level The START lamp will light Check Pin locations m a Es m 9 E m J J a Es a SM Select SET Select FIGURE 12 3 Start the machine The START lamp should go out after several seconds as set with the Start Time pot Adjust the web tension to the desired level using the Manual Control pot 5 Setthe desired tension level using the Set Point pot The Scale on the Set Point pot is keyed to the Tension Indicator and each graduation on the Scale Meter reads 1096 of the total meter value 6 Change the Mode Switch from MAN to AUTO The AUTO lamp should light If there is any variation between Set Point and the Tension bein main tained in MAN there will be a ramped increase or decrease when going from MAN to AUTO CAUTION Never change from AUTO to MAN while the machine is running Doing so will cause an
7. AL CONDITION CP6 CP13 Power supply for Tension Approx 6VDC Sensors CP14 Power supply for Relay Approx 13VDC POWER SUPPLY CP15 Power supply for Approx 15VDC O perational Amplifier CP16 Power supply for Approx 15VDC O perational Amplifier INPUT CP1 No 1 Amplifier O utput CP1 and CP2 should both indicate half of Test Load Value TLV SIGNAL Test Load Weight LB SECTION x10 VDC TLV Test Load Value Full Scale Reading LB Total Tension Total of CP1 CP2 or TLV CP4 Signal to Tension Indicator Same as CP3 in HIGH range Twice CP3 in LOW range CP10 Return Signal from No 1 0 400 mv varies as C P1 and CP2 except formula is changed to Sensor Test Load Weight LB Full Scale Reading CP11 Return Signal from No 2 Sensor Difference between Sensed Signal and Set Point CP7 PI Output Voltage will increase if CP 17 is greater than voltage will decrease if CP17 is less than CP3 Exponential O utput DEVIATION COMPUTING CP9 Stop Circuit O utput Same as CP8 in AUTO mode This value should increase as a multiple of SECTION E CP8 when STOP switch is energized CP12 Buffer O utpu 240 15 1VDC 4 mA output 5VDC Q 20 mA output CP17 Set Point Voltage 0 10VDC depending on Set Point pot position CP18 Manual Voltage 0 4VDC depending on Manual pot position FORM NO L 20120 E 0701 11 MTY 81 83 54 10 18 MEX 55 53 63 23 31 QE DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com IND
8. GES Naaza MEX 55 53 63 23 31 MTY 81 54 10 18 QE DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com nexen x WEB CONTROL PRODUCTS User Manual gt gt gt Tension Controller Models TC240 TC440 and TC640 FORM NO L 20120 E 0701 GES gt MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO 442 1 95 72 60 ventasQindustrialmagza 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 www 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 O N LY Improper installation can damage your system or cause injury or death Comply with all applicable codes Nexen G roup Inc 560 O ak Grove Parkway Vadnais Heights Minnesota 55127 Copyright 2000 Nexen G roup Inc ISO 9001 Certified ii GES Naaza MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventasQindustrialmagza com TABLE OF CONTENTS Introduction
9. RM NO L 20120 E 0701 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventasQindustrialmagza com START AND START TIME ADJUSTMENT The START pot controls the amount of brake torque applied as a hold back to prevent web sag from drawing material off the unwind roll while the machine is standing idle See Figure 11 The START TIME pot allows this START pot controlled torque to be maintained for a period of time after the machine is started STOP AND STOP TIME ADJUSTMENT W hen the machine is stopped the output signal immediately rises to brake an unwind roll to prevent run on or coasting This will prevent web spillage and maintain tension in the web See Figure 11 1 The rise in the output signal is controlled with the STOP pot See Figure 7 If the STOP pot is set at 0 the output signal will not rise it will stay the same 1 1 ratio If the pot is set at maximum the output will triple 3 1 ratio A midrange setting equals 2 1 ratio See Figure 11 2 This braking level is maintained for a period of 0 10 seconds as selected by the STOP TIME pot See Figure 7 3 When the time selected with STOP TIME has elapsed the Tension Controller output returns to the start torque level Atthis time the start lamp lights and the machine is ready to start See Figure 11 4 Forrewind and mid process control STOP and STOP TIME pot are normally set to zero TAPER TENSION ADJUSTMENT
10. USTRIAL MOUNTING DIMENSIONS via 1 2 szo t 081 ind TANWd 2 226 882 191 01 gt uuo sajo via LE M uuo 1Inpuo5 9 via s 0 02 FIGURE 14 FORM NO L 20120 E 0701 12 GSS Naaza MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventasQindustrialmagza com REPLACEMENT PARTS The item or balloon number for all Nexen products is used W hen ordering replacement parts specify model for part identification on all product parts lists product designation item number part description and quantity price lists unit assembly drawings bills of materials and Purchase replacement parts through your local Nexen instruction manuals Distributor PARTS LIST Power Supply PC Board TC240 amp TC440 2503 Meter Face 20 Lb Power Supply PC Board TC640 2634 Meter Face 50 Lb Main PC Board 2502 Meter Face 100 Lb Meter Face 500 Lb 10236 Meter Face 1 000 Lb 10240 Meter Face 2 000 Lb 10650 Output Meter TC 240 2485 Tension Indicator 5 Lb Meter 2149 Tension Indicator 10 Lb Meter 2150 Tension Indicator 20 Lb Meter 2151 Tension Indicator 50 Lb Meter 2152 Tension Indicator 100 Lb Meter 2153 Output Meter TC 440 2486 Tension Indicator 200 Lb Meter 2154 Output Meter TC 640 2487 Tension Indicator 300 Lb Meter 2155 7 Range Switch High Low S elector 2639 Tension Indicator 500 Lb Meter 2156 8 S
11. abrupt change in out put possibly breaking the web Once the Tension Controller is in AUTO it will retum to the set point tension every time the machine is started FORM NO L 20120 E 0701 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventasQindustrialmagza com OPERATING PROCEDURE NOTE The Mode Selector must be In the AUTO 4 position 1 Setthe Power Switch to ON Both the POWER and START lamps will light This verifies that the power is on the Control Signal is at the start level 5 and the machine is ready to start 2 Setthe desired tension level using the S et Point pot 6 The scale on the pot is keyed to the indicator and each graduation on the scale reads 1096 of the total indicator value 3 Startthe machine The AUTO lamp will light after 7 several seconds as set with the Start Time pot and the START lamp will go out as the Tension Controller begins Automatic Tension Control W hen the machine is stopped the AUTO lamp goes out and the STOP lamp lights The output signal from the Tension Controller immediately increases according to the position of the STOP pot The STOP condition will be maintained for a preset time as set with the STOP TIME pot Atthe end of the STOP TIME the START lamp will light the STOP lamp will go out and the output signal will return to the start level The machine is now ready to restart Repeat Steps 3 and 4
12. action to changes in roll diameter by fluctuating Slowly decrease the GAIN pot setting to eliminate the O utput Meter fluctuation Eccentricity in rolls egg shaped NOTE The Tension Meter needle will continue to oscillate FORM NO L 20120 E 0701 9 GES MNaaza MEX 55 53 63 23 31 MTY 81 83 54 10 18 SSE DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com MAINTENANCE There is no required maintenance as the Tension O perating elements brakes clutches motors etc must Controller and MB Tension Sensors have no parts be maintained according to manufacturers subject to mechanical wear Proper care must be taken specifications to ensure clean air for the Electro Pneumatic C onvertor as outlined in the Installation M anual CHECK PIN VALUES Refer to Figures 13 and Table 1 for check pin locations SWITCHES TO No 1 SPAN No 1 TENSION No 2 TENSION amp TOTAL SENSED TENSION TENSION CP10 pug INDICATOR 15VDC No1 ZERO 15VD CP6 N 2 SPAN 6VDC a gt es 15VDC No 2 ZERO 15VD CP6 O OUTPUT 20 mA 4 6VDC 9 2 3 4 6 8 FILTER GAIN i gt RK gt AUTO CP17 EXPONENTIAL SET POINT FIGURE 13 Check Pin Locations and Circuit Diagram FORM NO L 20120 E 0701 10 GA gt MEX 55 53 63 23 31 MTY 81 83 54 10 18 SE DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com EE CHECK PIN ITEM CHECKED NORM
13. ade as shown See ron Zero O Contact 250 VAC 0 2A Figures 3 and 4 on Capacity 30 VDC 2A NOTE The Start and Stop Terminals must be FIGURE 3 connected or the Tension Controller will not be able to control in Automatic Mode 4 The Zero Tension Relay is a normally open dry contact type which closes when tension falls below i o 3 of full scale To trigger a visual or audible web break indicator or interface with a machine stop i relay circuit for instant shut down wire to Terminals SEQ TH SEQ H 19 and 20 NOTE W hen using a Machine Stop Relay Circuit FIGURE 4 make sure Zero Tension S witch is set to ON The contacts are rated as follows Resistance Load AC 100 1A DC 24V 2A Induction Load AC 100V 0 6 DC 24V 1A FORM NO L 20120 E 0701 3 Ga gt MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO 442 1 95 72 60 ventasQindustrialmagza com 5 Terminals 21 22 and 23 are used for remote Set Point pots See Figure 5 External The Set Point pots are rated at 2K ohm 1 2 waft Setting 0 10V when using two pots or 5K ohm 5 0 waft when A aa using one pot Select the desired voltage at the DC em O Voltage Select Jumper located in the controller External N NOTE Supply voltage is wired to Terminals 29 and 30 Terminal 28 must be grounded Power 28 supply can be 100 110 120 220 or 240 29 volts AC and eit
14. e half of the total system capacity If the FIGURE 9 weight is greater than half of the system capacity set the Range Switch to HIGH Read the black scale for high setting and the red scale for low 6 Setthe Selector Switch to NO 2 setting 7 Adjust the NO 2 SPAN pot until the Tension 4 Setthe Selector S witch to NO 1 See Figure 7 Indicator reads one half the known weight 5 Adjustthe NO 1 SPAN pot until the Tension 8 Setthe Selector S witch to TOTAL The Tension Indicator reads one half the known weight Indicator must read the known weight TUNING GAIN AND FILTER ADJUSTMENTS NOTE These adjustments must be made with the web 3 The GAIN pot can be increased towards 10 if high moving line speeds are causing rapid Tension Indicator needle fluctuations Hunting or oscillation in the 1 Setthe GAIN and FILTER pots to the middle output signal can be controlled by decreasing the position between 0 and 1 0 for initial setting gain settings 2 Usethe FILTER pot to compensate for imbalance in the Sensor Roll SEQUENCE SWITCH SETTING Momentary Contact Maintained Contact Switching Switching A Me SEa H This switch is normally interfaced with the circuitry which starts and stops the flow of material through the process Depending on the type of switching used the SEQ S witch on the Tension Controller must be made as shown See Figure 10 and ELECTRICAL CONNEC TIONS Step 3 sEo H FIGURE 10 FO
15. et Point Potentiometer Auto Control 2640 9 Transformer C oil TC240 amp TC440 2636 Meter Face 200 Lb 10227 Transformer Coil TC 640 2637 Meter Face 300 Lb 10231 Tension Indicator 1 000 Lb Meter 2157 Manual Potentiometer Manual Control 2641 Meter Face 5 Lb 10207 Meter Face 10 Lb 2141 0 Mode Switch Auto M anual S witching 2642 1 Power S witch Front Panel 2643 2 1 1 Flexble Cable Assembly 2644 FORM NO L 20120 E 0701 13 Ga MNaaza MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO 442 1 95 72 60 ventasQindustrialmagza 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 W ITHOUT LIMITATIO N IMPLIED WARRANTIES 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 P roduct 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 o
16. f 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 P roduct 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 DAMAG ES CONSEQUENTIAL DAMAGES OR OTHER DAMAGES OF ANY KIND OR NATURE WHATSOEVER WHETHER ARISING OUT OF BREACH OF WARRANTY OR OTHER BREACH OF CONTRACT NEGLIG ENCE OR OTHER TORT OR OTHERWISE EVEN IF NEXEN SHALL HAVE BEEN ADVISED OF THE POSSIBILITY OR LIKELIHOOD OF SUCH POTENTIAL LOSS OR DAMAGE For all of the purposes hereof the term consequential damages shall include lost profits 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 B uyer 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 limitati
17. her 50 60 Hz This Suppiy 30 selection is made with the Voltage Select Jumper located on the Power Supply PC FIGURE 5 Board See Figure 6 6 A customer supplied tension readout meter may be connected to Terminals 24 and 25 if the meter has a 1 mA movement Terminals 26 and 27 provide the same readout in a 0 10VDC format FIGURE 6 PNEUMATIC CIRCUIT Install the air lines and the Electro Pneumatic Converter per the Instruction Manual provided with the Electro Pneumatic C onverter CALIBRATION NOTE The system must be calibrated during initial NOTE The Zero Tension S witch must be set to the start up The system requires no further OFF position during calibration calibration unless a component is changed Calibration must be done in the proper order The Mode Selection S witch located on the front panel of the Tension Controller can be switched to MAN to by pass the automatic control operation and allow manual control of tension with the Manual pot Total tension can still be read on the Tension Indicator and the output level on the O utput Meter when the Tension Controller is in the MAN Mode FORM NO L 20120 E 0701 INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventas industrialmagza com ZERO ADJUSTMENT With One or Two Tension Sensors 1 2 Set the Power Switch to ON Make sure the Sensor Roll is mounted to the Tension S ensor or Sensors as described
18. in the Tension Sensor Installation Manual Make sure the web has been removed and no other objects are sitting or resting on the Sensor Roll Set the Zero Tension S witch to OFF See Figure 7 Set the Selector S witch to NO 1 Adjust the NO 1 Zero pot until the Tension Indicator on the front panel of the Tension Controller reads 0 NOTE Iftwo Tension Sensors are used proceed with Steps 7 through 10 If only one Tension S ensor is used go to Step 10 Set the Selector S witch to NO 2 Adjust the NO 2 Zero pot until the Tension Indicator on the front panel of the Tension Controller reads 0 Set the Selector S witch to TOTAL the Tension Indicator must still read 0 if not repeat Steps 2 through 8 SPAN ADJUSTMENT With One Tension Sensor 1 Be sure the Tension C ontroller is correctly wired for operation with one MB Tension Sensor Check the installation of the jumper from Terminals 5 to 6 Thread a rope or narrow web over the Sensor Roll in the normal path Be sure the rope is at the center of the Sensor Roll Hang a known weight within the tension range of the system on the other end of the rope See Figure 8 Setthe Range Switch located on the front panel of the Tension Controller to LOW if the weight is less than one half of the total system capacity If the weight is greater than half of the system capacity set the Range S witch to HIGH Read the black scale for high setting and the red scale for low se
19. ion Controller door The added signal is then compared to the target value which is set with the Set Point pot on the front panel of the Tension Controller Any difference deviation between the added signal and Set Point is transmitted to the PI calculator section No 1 No 1 Tension Amplifier Sensor Amplifier No 2 No 2 Section Tension Amplifier Sensor Tension Setting Manual Control FIGURE 1 INSTALLATION The PI Control section performs P Proportional integral and exponential calculations based on the deviation signal The integral and exponential calcu lations are essential to the stability of the system Proportional and exponential calculations ensure quick response The output signal from the PI section is 0 6VDC This signal is fed to the output amplifier section The output amplifier receives the signal from the PI section and amplifies it to the correct output signal level This output level is displayed on the O utput Meter located on the front panel PI Control Section Exponential Operation Current ctus Amplification ctuator NOTE This is an electronic instrument and should not be mounted where it is subject to shock vibration excessive heat or moisture The Tension Controller may be mounted at any angle Refer to the dimensional drawing located in the back of this manual for hole locations The Tension Controller can be shelf or floor mounted using the mounting feet installed
20. ned for use with center wind clutches only To use taper tension with a variable speed drive control contact your authorized Nexen W eb Controls Representative INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventasQindustrialmagza com JUMPER SELECTION There are several jumper wires on the Main PC Board and Power Board These wires must be installed on the proper pins Model Select Jumpers are set at the factory NOTE The Tension Controller model can not be changed with the Model Select Jumper Check this jumper to be sure that it is on the correct pin SET SELECT JUMPER This jumper is used to select the manner of setting the target tension value for automatic operation It is normally set on the INT pin to allow setting with the AUTO Set Point pot located on the front panel of the Tension Controller The EXT pin is connected when an external adjustment pot is connected to Terminals 21 22 and 23 or when receiving an isolated set point signal from a process controller SM SELECT JUMPER The SM Select Jumper is normally set to the S pin W hen the START level is changed frequently the jumper can be set to the M position This allows the start level to be controlled with the manual pot located on the front panel of the Tension Controller TEST RUN After system calibration make a test run using the lowest tension web that will be used in normal operation The lower the web
21. on Sensors Sensing narrow webs or wire may be done interface with one Nexen Tension Sensor Two MB Tension Sensors are normally used to provide sensing at both ends of a sensor roll eliminating any error caused by a difference in tension from one side of the web to the other FORM NO L 20120 E 0701 The output signal of the tension control depends on the model number The TC 240 has a 4 20 mA output This signal is used with the Nexen Electro P neumatic C on verter It varies output air pressure in direct relation to the variable input signal from the TC 240 This output air pressure can be used to actuate a pneumatic clutch brake or motor TC440 provides a 0 8VDC output signal to interface with variable speed motors The output signal from the TC 640 is 24VDC 0 64 This signal is compatible with 24V electromagnetic clutches and brakes INDUSTRIAL MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO 442 1 95 72 60 ventasQindustrialmagza com OPERATION The signal adder section receives the input signal from each MB Tension Sensor These signals are 0 400 mV Each signal is amplified and the amplified signals are added The added signal 0 10VDC is displayed at the Tension Indicator on the front panel of the Tension Controller as a total tension reading The tension being sensed by either MB Tension Sensor may also be displayed on this Tension Indicator by using the S elector S witch located inside the Tens
22. on 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 Productto 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 Certified FORM NO L 20120 E 0701 14
23. tting Set the Selector S witch to NO 1 See Figure 7 FORM NO L 20120 E 0701 zero ON TENSION OFF NO 1 ZERO NO 2 NO 1 SPAN o NO 2 SPAN NO 1 AL FILTER TL PE T GAIN P SEQ H START o START o TIME o STOP TIME TAPER o FIGURE 7 10 Setthe Zero Tension Switch to ON If the web break circuit is not being used leave the Zero Ten sion S witch in the OFF position Thread a rope or narrow web in the normal path and secure this end FIGURE 8 5 Adjustthe NO 1 SPAN pot until the Tension Indicator reads the known weight 6 Fully rotate the NO 2 SPAN pot counterclockwise to 0 7 Setthe Selector Switch to TOTAL The Tension Indicator should read the same as NO 1 total weight Ga gt MEX 55 53 63 23 31 MTY 81 83 54 10 18 DIST AUTORIZADO QRO 442 1 95 72 60 ventasQindustrialmagza com SPAN ADJUSTMENT Thread a With Two Tension Sensors rope or narrow web the normal 1 Be sure the Tension Controller is correctly wired for path and operation with two MB Tension Sensors secure this 2 Thread a rope or narrow web over the Sensor Roll in the normal path Be sure the rope is at the center of the Sensor Roll Hang a known weight within the tension range of the system on the other end of the rope See Figure 9 3 Setthe Range Switch located on the front panel of the Tension Controller to LOW if the weight is less than on
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