NP-20 z OPERATING INSTRUCTIONS
Contents
1. R 20 000 R 20 000 a 10 000 Gal 0 000 10 7 8 45 6 4 ES Q 1213 One DISPLAY NOTE Device is set to absolute mode no axis is selected Axis indicator light Choose the axis in which you like to steady preset new absolute position gi Axis indicator light 78 9 steady On numerical keyboard type the 4 56 Decimal point on required new absolute position 1 2 3 last typed digit pulsate New position is Confirmation of new absolute position displayed The old absolute position is loosed No number on the Deleting of typed numbers due to typing axis displa failure or other reason Old absolute Abandon of absolute position preset position Old absolute position is maintained Device is set to Absolute mode NP20z_ang doc edition December 2002 page 19 5 2 2 RESET of ABSOLUTE POSITIONS If the parameter P11 is set to 0 see chapter 4 1 the absolute position of the measuring axes can be directly reset by RESET key of corresponded axes IR 20 000 x 0 000 gt Reset of absolute position will cause e loss of old absolute position e if axis was calibrated it will became non calibrate 5 2 3 Mm Inch SWITCHING OVER The units in which the position is displayed can be toggle between metric s and Inch s units by pressure to key mm inch Unit selection is valid2. x 20 000 a 5i 2 10 000 a 8 a x 5 6 A 0 000 2 2 0 000 iB R rel YYY R If corresponded parameter P9X of datum point DPX is not defined empty after selection of datum point is done position display s will show APOX __ When datum point is selected indication ref is switch off and information about calibration status is hidden All settings mm inch R D will stays the same as in previous datum point except axis selection which through any transitions became deselected 5 2 7 2 SETTING THE DATUM POINTS BY POSITION ENTRY Datum point s offsets values of parameters P1xx can be set by position preset procedure if position preset is done when datum point is selected The device automatically calculates the corresponding parameter values of the datum point and enters them into the memory e g inch 1A 785 k 0 000 so 2 0 000 123 o f mm inch 4 Ay x R R an NP20z_ang doc edition December 2002 page 23 In the above example the device will enter the following value of parameter P91 P91x 20 000 P91z 0 000 You can check it by selecting this parameter PROCEDURE DISPLAY NOTE Device is set to absolute mode datum point 1 no axis is selected Axis indicator light Choose the axis in which you like to steady preset new absolute posit
3. ein 20 5 2 4 Radius diameter SwitChing OVel cccccceeeceeeee eae eeeee esses eeeees 20 5 2 5 Halve of measured value in Z AaXIS e cece eens teens nennen 21 5 2 6 Freeze of absolute positiON seken kakak aaa aan 21 5 2 7 Datum points dp00 dp99 Arc nr nenne 22 5 2 7 1 Datum point selectiOn see cece neces eee eeeeeeeeeeeees 22 5 2 7 2 Setting the datum points by position enter 23 5 2 7 3 Datum points setting by manual parameter entry 23 5 0 Relative MOdE aa sa 24 5 4 Distance to go IMOdG nn 27 5 5 Axis shift velocity measuring MOAdE aa 27 6 SERIAL DATA TRANSFER u 28 7 STATUS AND ERROR INDICATION nennen 30 8 TECHNICAL DAV A ites nn Ba An Anna en ad Dadi 32 NP20z_ang doc edition December 2002 page 3 NP20z_ang doc edition December 2002 page 4 1 SCOPE OF DELIVERY Position readout NP 20z for lathes Possible options R K B Spare fuse link 0 3 A T for 220 V i e 0 6 A T for 110 V Power cable with safety plug for 220 V 50 Hz and three pole socket length 3 m NOTE Meanings of options designations R connector RIE only for rotary transducers K interface RS 232 C for serial communication B battery backup 2 GENERAL DESCRIPTION Position can be measured both in transverse and longitudinal axes X Z and in an ad
4. Z and Z axis lt P199 Dp99 gt Coordinates of the datum point DP99 in the X Z and Z axis NP20z_ang doc edition December 2002 page 14 5 MEASURING FUNCTION NP 20 can be set in different modes of operation performing the proper measuring functions or settings The conditions which cause transitions between different modes is shown in diagram bellow Reference mode Calibration iS L G ee nn option B ab Absolute mode eel Relative mode Calibration 9 J 45 6 72 Distance to go mode procedure finished Parameters settings and reviewing Velocity measurement Selected mode in which NP 20 temporary operate is marked by indications on the display according to table bellow Indications Mode Calibration status Ref XorZ Rel Off Off Off Absolute Calibrated Off On Off Off a Relative Calibrated Off On Relative Calibrated On Off On On On Off On Relative Non calibrated On On On Relative Non calibrated Pulse On Off Reference Non calibrated main axis calibration Calibrated auxiliary axis Pulse On Reference Non calibrated main axis calibration Non calibrated auxiliary axis Pulse Off Off Reference Calibrated both axes Da calibration Pulse Pulse Off Reference Determination of reference determination value NP20z_ang doc edition December 2002 page 15 5 1 REFERENCE MODE If the NP20 is equipped with battery
5. back up system option B after switch on it is set to absolute mode REF indications lights steady indicating that absolute position is not calibrated If user like to calibrate absolute position he should by pressing to key REF enter into the reference mode If the NP20 is not equipped with battery back up system without option B the device after a switch on is automatically set to the reference mode Axes indications lights steady indicating that these axes have not been calibrated 5 1 1 CALIBRATION OF ABSOLUTE POSITION WITH REFERENCE MARK Calibration of absolute position requires that device is set to the reference mode and reference value should be entered into the parameter P90 If reference value has not been entered into P90 when device is set to reference mode message ref ___ will appear on the display of corresponding axis In that case user should enter reference value by procedure describe in chapters 5 1 2 or 5 1 3 PROCEDURE DISPLAY NOTES Entrance in the reference mode calibration If reference value have not be entered ref is displayed Pass over the After reference mark is passed display starts to reference points on display the position In the case if auxiliary axis the encoders is used first pass the reference in that axis and than in main axis When calibration procedure is finish NP 20 automatically return to absolute mode 5 1 2 DETERMINATION OF REFERENCE VALUE WITH REFERENCE PULS
6. for both axes Conversion rate is 1 inch 25 4 mm The status indicator shows selected units After switch on of the NP20 position will be displayed in units which was active before switch off ie 20 000 iS 0 7874 5 2 4 RADIUS DIAMETER SWITCHING OVER Position of tool axis X axis can be displayed in Radius or Diameter After switch on NP 20 display position of tool axis X in diameter by pressure to key R D position display will be toggle to radius Selected display mode is indicated on R D status indicator NP20z_ang doc edition December 2002 page 20 5 2 5 HALVE OF MEASURED VALUE IN Z AXIS Halve of measured value in Z axis is purposed to simply find the middle point between two points along the Z axis Halve function is activated only if Z axis is selected by key R D f 20 000 z 0 000 Z 10 000 2 10 000 5 2 6 Freeze of absolute position If the parameter P11 is set to 1 see chapter 4 1 the pressure to key will cause freeze of current position on the display Pulsating of proper axis designator on axis status display indicates freeze of proper axis In the back position is followed and following pressure to key RES will release position display NP20z_ang doc edition December 2002 page 21 5 2 7 DATUM POINTS DP00 DP99 Datum points are used for revers
7. g 12 pole connector 120 kHz NP20z_ang doc edition December 2002 page 32 NP20z_ang doc edition December 2002 page 33 9 FRONT AND REAR PLATE OPERATING ELEMENTS inch indications mm indications r display DP D R key REL key REF key Be NP20z Iskra axes indications D R indications REL indications REF indications mm inch key Numerical keyboard DP Datum point key Bey ENTER key axes displays X axis input conn DELETE key axes keys axes reset keys Power switch on off Fuse Power supply input RS 232 Z axis input conn RIE Connector Zo axis input conn Connector Clearance of at least 120 mm has to be provided for accommodating the electrical connections at rear of the device NP20z_ang doc edition December 2002 page 34 NOTES NP20z_ang doc edition December 2002 page 35
8. it is valid for both axes Abandon of this mode is done by key DELETE fren A inch A 20 000 D D 1 00 Z 0 000 a Z z 0 00 10 lt ug 4 56 oL NP20z_ang doc edition December 2002 page 27 6 SERIAL DATA TRANSFER 6 1 Cabels for connection with PC and Printer NP 30 RS 232 PRINTER RS 232 IBM PC RS232 IBM PC RS 232 connector 25 pol D SUB male 25 pol D SUB female 9 pol D SUB female 9 pol D SUB male Signal colour 1 GND Shield 1 GND Shield GND Shield 2 TxD Red 2 TxD Red TxD Red RxD RxD 3 White 3 White RxD White GND Black SS aes ES ee ee RTS Green CTS Yellow CTS Yellow Yellow 6 2 Structure of serial data and baud rates Baud rates are set by parameter P7 Possible baud rates are 300 600 1200 2400 4800 and 9600 Data is received and transmitted in following data format 1start bit 8data bits 1stop bit no parity Stop bit 8 data bits Start bit 6 3 Data transfer command and output shapes 6 3 1 Transfer of label data This transfer can be initialised e by typing keys lt P gt lt ENTER gt on the NP 30 keyboard or e by sending a CTRL B ASCII character hex code 02 through RS232 channel NP20z_ang doc edition December 2002 page 28 After initialisation NP 30 will send a following data message start with CR and end with number of LF which i
9. off Use the delete code PO 6 28 for deleting all parameters This is recommendable especially when the installed EPROM circuit is replaced by a new one i e by another software version The following diagram shows the procedure for calling monitoring and entering the parameters in different modes of selection by entering the machine parameter PO 3 14 PROCEDURE DISPLAY X NOTES P o 0 Parameter selection POO codE Alternate designation value display Dashes for codE gt empty parameter Dea Value selection right point is flashing POO codE Value entry alternate indication of designation 3 14 and parameter value P01 Incr Switchover to next parameter Abandon of parameter settings or reviewing Having entered the protection code continue entering the remaining machine parameters When you have set any parameter by pressing the key ENTER the next parameter appears on the display In case you do not want to set or change it press the key ENTER in order to choose the following parameter For direct selection of a particular parameter press the key P and enter the parameter number e g P 090 In case of a typing error press the key DELETE and start again the entry NP20z_ang doc edition December 2002 page 10 lt P01 Incr gt The counting direction the measuring mode the number of decimal places and the weight factor by which a measuring increment affects the last digit in the X or Z displays The weight factor
10. 0 Define the number of empty lines which are outputs after print out a one message Possible values are 1 to 50 Define the function of key Res P11 0 Key RES will reset absolute position of appropriate axis P11 1 Key RES will freeze hold current absolute position of appropriate axis Define type of reference mark used on the measuring encoders for main axes P15 0 Standard reference mark P15 1 DCR reference marks NP20z_ang doc edition December 2002 page 13 4 2 ENTRY OF TECHNOLOGICAL PARAMETERS Technological parameters are entered into permanent memory in the same way as the machine parameters except that it is not necessary to enter first the protection code PO 3 14 lt P90 rEF gt Reference value for X or Z axis In the auxiliary axis the O value is assumed automatically Reference value represent a distance in position or angular units from of absolute zero point and reference point on the linear or rotary encoder Reference point in axis Reference point in X axis gt Z Reference value in X axis Ref value in Z axig ae p Ref value in Zo EIER In the case if Distance coded reference is used Reference value represent a distance in position or angular units from zero point of absolute zero and 1 reference point on the linear or rotary encoder lt P101 dP01 gt Coordinates of the datum point DP1 in the X
11. 0 3 001 02 0 3 005 10 0 3 001 01 0 3 005 05 0 2 001 10 0 3 005 01 0 005 5 um 0 3 010 02 0 010 0 2 001 02 0 01 lt P03 Lin c gt The linear correction factor Values from 65535 to 65535 are admissible The entered value represents the coefficient in particles per million particles with which the device corrects the measured value before indicating it Xaisp Xmeas 1 P03 10 A a ana aka displayed value compensated Nena measured value POS a Value of parameter 3 The zero of the correction line is set by the device in the last written position PRESET RESET absolute position entry by means of RI relative position entry by means of key REL PRESET Correction line y Ko 1 00 Xp 100 00 199 00 xq indicated gt X aes 0 00 100 00 200 00 x measured EXAMPLE The last written position is Xp 100 00 mm P07 10000 this corresponds to 10000 particles per million particles i e 1 Xy X x X P03 10 For x 0 X 0 0 100 10000 10 1 00 For X 200 x 200 200 100 10000 10 199 00 Usage of linear compensation is recommended e for older machine with bended guide ways with purpose of eliminating Abbe error e for usage of angular measurement on the rotary table by means of rotary encoder with purpose to adjust required displayed resolution with encoder s_ line number and gear ratio of rota
12. 6 4x Supply Unit Power supply output 5V Y ifi Power supply input 100 250V Power switch ON OFF f JE 255 4 263 4 Clearance of at least 120 mm has to be provided for accommodating the electrical connections at rear of the device NP20z_ang doc edition December 2002 page 7 3 2 CONNECTION Correct connection of the device and of the measuring system are very important for reliable operation especially when the device is applied in strenuous working conditions close to power cables inductive load switches etc The following basic rules should therefore be observed during the connection of the device e The housing of the device must always be grounded in the same grounding point as the machine either via the grounding conductor of the mains power supply cable with safety plug or by connecting a special grounding conductor to the grounding screw at rear of the device The cross section of the grounding conductor shall not be less than 1 5 mm and by the shortest route should be connected to main grounding point of a machine lt 1 5mm by shortest way to D O D machine around point O e Cables with measuring and control signals of the device connectors X Z Z RIE RS232 have to be laid as far as possible from the power cables on the machine and from the other powerf
13. ALLATION AND CONNECTION OF THE DEVICE 3 1 S compact table version 101 161 5 150 60 P Panel Build in version EXTERNAL DIMENSIONS AND FASTENING 250 mx NP 20 Iskra ans e mm CIE JED Onn SED 205 T Mounting dimension M5 Panel mounting dimension 244 0 5 x 145 0 5 Sheet thickness 1 6 mm max 101 T Tabletop version NP20z_ang doc aot 250 foe ee ee aa 2 NP 20 Iskra kK GE te ans ne lt t edition December 2002 page 6 25 o 60 N 99 c Console version 250 1 nP20 Iskra ED lar DO Oh E GID LIED CLI E OG res ee 150 205 Mounting dimension M5 227 250 25 m nP20 iskra ED LED u DO QR OOD o SID amp 2 E gt _ 12 el RES 4 Le P m 1 Fer ie 50 L L 150 200 450 05
14. E Itis used when we want to save an already selected absolute coordinate system so that we can re establish it in case it gets lost when the device is switched off or for other reasons PROCEDURE DISPLAY NOTES Absolute mode position known position position it by calliper or micrometer Preset the known REF P Shows Set the NP 20 to reference mode determination position In the case if auxiliary axis is used first pass the Pass the reference reference marks in that axis and after in main axis NP marks on both axis 20 will inform the receiving of reference mark by sound After passing of reference mark NP20 will be set to absolute mode and reference value will be entered into the P90 NP20z_ang doc edition December 2002 page 16 EXAMPLE Determination NP 20 is set in REFERENCE mode Measuring Presetting NP 20 is set to ABSOLUTE mode Turning 5 1 3 MANUAL ENTRY OF REFERENCE VALUES IN THE P90 PARAMETER This mode is generally used only for testing e g when we want to enter the zero reference value in both axes NOTE Do not enter the parameter for the auxiliary axis as it automatically assumes the zero value NP20z_ang doc edition December 2002 page 17 5 2 ABSOLUTE MODE Absolute mode is basic operation mode of NP 20 In this mode NP 20 display the absolute position which can be calibrated or non calibrated in this mode it is possible to switch display of Zo a
15. NP 20 z OPERATING INSTRUCTIONS x 8 y x NP20z_ang doc edition December 2002 page 1 Copyrights 2002 Iskra TELA d o o Printed in Slovenia 2002 NP20z_ang doc edition December 2002 page 2 CONTENTS T SCOPE OF DELIVERY 2 2 2 322 ER 5 2 GENERAL DESCRIPTION nu seien aaa 5 3 INSTALLATION AND CONNECTION OF THE DEVICE aaa 6 3 1 External dimensions and fastening anna kan 6 922 GOMMCCHON ae erkenne 6 3 33 KO ONMOECLONS elle vase a AN NA EE 7 4 ADJUSTMENT TO THE MACHINE ccc cccccccccesssteeeeeeeeeessseeeeeesseeeaeees 10 4 1 Entry of machine parameterS eek keseksaan 10 4 2 Entry of technological parameters cseeseeececceceeeeeeeeeeeeeeeeeeeeeeeeeeees 14 5 MEASURING FUNCTIONS ccc cceecceceee eee kakek kenakan aaa nenn 15 6 1 Reference model ss Aw a AKA R E Bn naa 16 5 1 1 Calibration of absolute position with reference mark 16 5 1 2 Determination of reference value with reference pulse 16 5 1 3 Manual entry of reference values in the p90 parameter 17 5 2 Absolute M d nun ae ea Rn 18 5 2 1 Preset of absolute position 2244u2444neeennenennnn nennen enen en nennen 19 5 2 2 Reset of absolute positions eek nennen nn en 20 9 2 3 MMiINEN SWIlching OVen
16. RE DISPLAY NOTE Rel indications light steady Entrance into the relative mode position display s is set to 0 000 Axis indicator light Choose the axis which will be position by steady distance to go mode Decimal pointon Type ina target absolute position Position last typed digit display shows typed numbers pulsate Distance to target Confirmation of typed target absolute position is position After confirmation distance from displayed current to target position is shown No number on the Deleting of typed numbers due to typing axis display failure or other reason Old relative Abandon of target absolute position preset position Device is set to relative mode DAR Distance to target Driving toward zero value on the display position is shown Displayed position Target position is reached on selected axis is zero Rel indications Device is toggled to Absolute mode switch off target Target absolute position is displayed absolute position is displayed Device is set to absolute mode X axis is selected NP20z_ang doc edition December 2002 page 26 5 5 AXIS SHIFT VELOCITY MEASURING MODE In axis shift velocity measuring mode position displays shows axis shift velocity The velocity is indicated in m min or in inch min depending of the selected measuring units mm or inch This mode is useful for settings of optimal and repeatable turning conditions When velocity mode is selected
17. ditional axis Z that is parallel to longitudinal Position value in the auxiliary axis can be continuously added and is indicated in the position of the related main axis Z or can be display separately on the display Zo X Z and Z displays indicate the absolute or the relative position When the relative mode is selected in one or in both axes the related indicator REL is lit In the relative mode it is possible to measure depending on the relative zero which can be selected by pressing the key REL in the current position Incremental linear or rotary measuring transducers with square or sine wave measuring signals are used for position measuring Built in monitoring functions assure reliable operation assistance at work and easy troubleshooting of eventual errors in the measuring system or during the operation If an error occurs a message appears on the appropriate display indicating the cause for the error e g pressure on a wrong key Err type gt exceeded max Movement speed lt Err 1 gt undetermined parameter lt Err PAr gt etc The messages are deleted and reception acknowledged by the key DELETE Position readout NP 20 is optionally equipped with battery backup system This system assures in the case of power failure storage of absolute position in the moment of power failure When the power is set readout shows the last absolute position before power failure NP20z_ang doc edition December 2002 page 5 3 INST
18. e RIE switches are only required when rotary measuring transducers are used The installation of the switch has to assure that it is only active for the particular reference pulse at which we want to set the reference value the transducer generates one reference pulse at each rotation The break contact of the switch is used Connector for serial interface RS 232 Connector contacts option K Shield grounding RXD input data reception TXD output data transmission Not connected GND 0 V Not connected RTS output Request to send CTS input Clear to send Not connected device NP computer printer i shield O 6 wi a ooh RXD O O O r7 gt RTS TXD 8 lt CTS 9 5 Of gt GND Ci ooNOQGARAON gt Viewing the rear plate NP20z_ang doc edition December 2002 page 9 4 ADJUSTMENT TO THE MACHINE 4 1 ENTRY OF MACHINE PARAMETERS The device is adjusted to the machine by entering the appropriate machine parameters These values are stored in the permanent non volatile memory until the new values are entered Numbers from P1 to P49 are assigned to machine parameters and higher numbers to technological parameters Machine parameters can only be set by entering first the value 3 14 PO 3 14 for the PO parameter This is the protection code that protects the parameters against unintentional entry or deletion This code entrance is active until the device is switched
19. ible shifting of the coordinate origin point of the measuring system in one or in both axes When datum point is selected position display will show the position described by following equation Xgispppx Xdispo P9x XdispDPx position display in X datum point Xadispo position display in absolute system POX pesen laan value of parameter P9x Datum point s shift of coordinate origin can be used for e processing an identical work piece at several different working locations X e Preselecting some points in the absolute coordinate system e presetting tool offsets The position of datum points DP1 DP99 depending on the absolute starting point is determined by setting for each axis separately the P101 P199 parameter values Datum point can be set by position preset or by datum point offset value entry in corresponded parameter The datum point DPOO has always the X 0 Z 0 value meaning that it is situated in the starting point of the absolute measuring system NP20z_ang doc edition December 2002 page 22 When the absolute coordinate starting point is shifted to some other point the datum points are also automatically shifted by keeping the same relative position depending on the starting point as they had before 5 2 7 1 DATUM POINT SELECTION Pressing the key DP and the appropriate number select the datum point roof maa
20. ion al Axis indicator light 819 steady On numerical keyboard type the a 56 Decimal point on required new absolute position uaa last typed digit pulsate New position is Confirmation of new DP 1 position The displayed previous offset of DP 1 is lost The new datum point offset is calculated and entered in P101 parameter D axis displa failure or other reason lt Old absolute Abandon of absolute position preset position Old absolute position is maintained Device is set to absolute mode datum v point 1 X axis is selected 5 2 7 3 DATUM POINTS SETTING BY MANUAL PARAMETER ENTRY The entry is similar as for the other parameters Item 4 1 5 3 RELATIVE MODE The relative mode is useful when machining parts according to drawings where measures are made in relative manner sketch bellow Absolute position in relative mode is not lost only displayed position when entrance in relative mode is 0 000 Abandon of relative mode will set NP20 in to a absolute mode and position according to old absolute coordinate system will be displayed gt DT Z abs pm Tel Pressing to key abs rel does toggle from absolute mode to relative mode NP20z_ang doc edition December 2002 page 24 Relative mode is indicated by rel indications on the axis status display Procedure is shown bellow PROCEDURE Device is set to absolute mode no axis is selected Select the axis which you like to set in
21. is a fraction with any two or three digit whole number in the numerator and the denominator altogether 5 digits Also the 00 or 000 numbers meaning 100 or 1000 respectively are admissible A B CCC DD Weight factor Define influence of one measuring increments to displayed values Xmeas Number of increments DD CCC Number of decimal places Type of measurement 0 Linear measurement 1 Angular measurement In decimal format Counting direction Positive direction Negative direction e Weight factor CCC DD Define the influence of measuring increments to displayed values Xmeas number of increments DD CCC Number of increments counted number of increments From linear or rotary encoder A mess ne ee measured value Number of increments DD integer representation of divide value without a rest e Number of decimal points B Define the number of digits on the right side of decimal point Can be any number between 0 and 4 e Type of measurement A Define the type of measurement NO eb tach oot a at ait te ela Linear measurement Ve Angular measurement in decimal Format e Counting direction Define the direction of counting when a positive transition of A signal precede a positive transition of B signal Eman a Positive direction Penan A teh SAN Negative direction Examples Scale resolution P01 Display resolution NP20z_ang doc edition December 2002 page 11 0 4 005 01
22. n with purpose to recognise if some light elements is out of function lt ErrtyPE gt This message is displayed if operator type a command which can t be executed or which is out of sense Example NP20 is set to axis shift velocity mode operator press the key REL message Err tyPE will be displayed and disappear after 1 second lt Err 1 gt Two neighbouring edges of input signals A and B are to close together This message can be caused by e Exceeding of maximal axis shift velocity e Influence of Electromagnetic disturbances on measuring system or any of its component linear or rotary encoder DRO e Linear encoder installation alignment is not properly done e Machine guide ways are looseness Message can be deleted by pressure to key DELETE If any other reason except exceeding of velocity caused this message maintenance repair activities should be done This diagnostic function is available upon a special order lt Err 2 gt Position measuring error Difference of Absolute positions during current and previous pass over reference mark in increments is bigger then value which is set to parameter P6 If absolute coordinate system is not calibrated diagnostic is active If value of P6 is set to 0 this diagnostics is inactive If distance coded reference is used this diagnostics is active Possible reasons for this failure e Settings of parameter P15 or P16 define type of reference mark does not corres
23. pond to used linear encoder e Use of encoders with multiple reference marks e Exceeding of maximal axis shift velocity e Influence of Electromagnetic disturbances on measuring system or any of its component linear or rotary encoder DRO NP20z_ang doc edition December 2002 page 30 e Linear encoder installation alignment is not properly done e Machine guide ways are looseness Err 2 message can be deleted by key DELETE position display of axis in which failure was happened will show the value in increments of difference in absolute position between current and previous pass press to key DELETE will return NP20z to the mode which was set before failure happened See diagram PROCEDURE DISPLAY NOTE Nb Or lt Err 3 gt lt Err 4 gt lt Err 5 gt lt Err 6 gt lt Err PAr gt lt Err SOFt gt Pass over a reference mark Err 2 message Absolute position during current pass over appears on the the reference mark is different then during failed axis previous pass On the position This number is difference in increments display of failed between absolute position and previous axis number is position shown NP 20 is set to mode which vas selected Position display before failure happened Position displays shows position shows position Old absolute position in failed axis is lost If axis was calibrated it became non calibrated A damage of one or multiple memory cell
24. relative mode If no axis is selected settings to relative mode are valid for all axes Axis indicator light steady Position display of selected axis is set to 0 000 rel Setting into a relative mode indicator lights stead Operation in Position display Position display follow relative position relative mode follow relative based on relative origin position Abandon of relative mode Position display shows absolute position based on an absolute origin rel indicator switch off position display shows absolute position In relative mode is admissible to make radius diameter toggle mm inch conversion and freeze the position display Reset or preset of position in relative mode set the NP20 in distance to go mode NP20z_ang doc edition December 2002 page 25 5 4 DISTANCE TO GO mode Distance to go mode is purposed to simplify positioning operation on the machine tool Operator simply through specified procedure enters the wished absolute position and position display of selected axis show you distance remaining to target position When position display shows 0 000 target absolute position is reached C 0 000 Into distance to go mode is possible to enter from absolute mode through relative mode and presetting in relative mode target position Procedure is described in the diagram bellow PROCEDU
25. ry table mechanism In a case if angular measurement on the appropriate axis is selected and linear compensation is different then 0 displayed value can be in the range of 360 15 Reason for that limitation is to avoid arithmetical error caused by limited number lengths NP20z_ang doc edition December 2002 page 12 lt P05 doff gt lt P06 toll gt lt P07 232c gt lt P08 n LF gt lt P11 Hold gt lt P15 dCr gt When the digits change too quickly the last display digits are shaded P05 0 Shading off P05 1 Shading on Counting error tolerance P06 0 Counting error monitoring is off P06 1 15 Counting error value in measuring increments that causes device error indication lt Err 2 gt NOTE Counting error monitoring patented by ISKRA is active in the manual mode even when the measuring system is not calibrated by means of the reference value Every time the reference point on the measuring transducer is passed over the device measures the reference value and compares it with the reference value recorded at the previous passage over the reference point In case the values are not equal and the difference between them exceeds the tolerance P06 the device indicates the error lt Err 2 gt When this message is deleted the device also indicates the value of this difference Define the baud rate for serial communication interface option K Possible values are 300 600 1200 2400 4800 960
26. s define in parameter P8 gt Number of datum point Actual position on display gt Selected measurement unit mm or inch Selected mode of measurement relative rel Or absolute empty a Selected halving function 6 4 Transfer of current position This transfer can be initialised e by sending a CTRL H ASCII character hex code 08 through RS232 channel After initialisation NP 30 will send a following data P Preamble Actual position of X axis and mode of measurement P Actual position of Z axis and mode of measurement P Actual position of Z axis and mode of measurement p Selected measurement unit mm or inch he dipp PE A ay A ai Gah eee Bs SANA po es yA NP20z_ang doc edition December 2002 page 29 7 FAILURE DIAGNOSTICS With a purpose to assure stabile safety and accurate operation of measuring system on the machine tool NP20 device is equipped with several diagnostic functions Failure diagnostic functions in the case of any irregularity in operation of NP20 or periphery units which are connected to it linear or rotary encoders warn the operator by message on the position display s Proper procedure when warning message is displayed will avoid expenses caused by improper machining and simplify repair or maintenance operation After switch on during initialisation procedure for approx 0 5 sec all segments of light elements are switch o
27. s in internal structure of E PROM The parameter storing is not stable This failure can be caused by too often changing of parameters value gt 150 000 During normal operation calculated lifetime for internal E PROM is more then 41 years Counting logics error This failure can be caused by e Settings of parameter PO2 to any value if NP20 is not equipped with option Q or Z auxiliary axis e Break down of electronic component s Break down of internal RAM circuit Calculating error exceeded max arithmetic value One or several positioning parameters have not been entered display X Error in the device software NP20z_ang doc edition December 2002 page 31 8 TECHNICAL DATA Power supply voltage On request Network frequency Power consumption Ambient operating temperature Relative humidity Protection degree Vibrations Shocks Power cable interferences EM field Electrostatic discharge Safety class Dimensions width x height x depth Weight NOTE Tested according to the IEC standards SQUARE WAVE MEASURING SIGNALS RS 422 A EIA standards Max signal frequency 220 V 10 15 110 V 10 15 48 to 52 Hz 20 VA approx 0 to 45 C 5 to 75 54 front plate housing IP 42 rear plate 1 g from 10 to 150 Hz 15g symmetrical 2 5 kV asymmetrical 2 5 kV 10 V m from 27 MHz to 200 MHz 13 kV group 1 according to IEC 348 250 mm x 163 mm x 126 mm cca 2 200
28. ul sources of electromagnetic disturbances relays contactors motors transformers switch mode power supply e Inductive sources of disturbance on the machine or in the environment of the device couplings relays magnetic valves etc have to be choked by parallel connecting corresponding standard choking elements diodes zener diodes RC elements for the DC power supplied elements and RC elements for the AC power supplied elements a ae az for protection a J L lt 60 de 1N4004 DC relays Era Vde en 2 al 600V R C 250Vde V dc 0B sw_ o suF 1000v 5uF 1000V _ 115 Vac 220E 1W 0 5 uF 600V 230 V ac 220E 5W 0 5 uF 1000V 440 V ac 220E SW 0 5 uF 2000V NP20z_ang doc edition December 2002 page 8 Switches Relays and AC motors 3 3 CONNECTORS Axes Connectors for square wave Encoders Connector contacts Shield grounding GND 0 V Signal A Signal A_ Signal B Not connected Signal RI Signal RI Not connected 5 V Signal B Not connected ZzFA IOTMONOUD Viewing the rear plate Connector for RIE switches option R Connector contacts Switches on the machine RIEx RIEz RIEZ Not connected 5V Input RIEz auxiliary axis Input Ryes Not connected Not connected 00 RIE x ee RIE 2 auxillary axis nee eae RIE 5 wo OONDAARWDNDY Viewing the rear plate NOTE Th
29. xis to be displayed separately or added with axis Z 40 a i R 5 000 gt lt 5 000 Zo re o re 25 000 zs z ref 15 000 lt q 2 ref 40 000 n A AN 46 an nr AN If NP 20 is set to any other mode of operation it will be returned to absolute mode after specified task in the other mode is performed In the absolute mode is possible to preset the absolute position reset the absolute position switch over the metric or inch measuring units switch over the radius or diameter position display in tool axis halving the measured value in longitudinal axis operate in a different datum points or preset datum points value Separate display of Zo axis is very useful in the case when taper s shape should be machined tr 5 000 ve 25 000 15 000 NP20z_ang doc edition December 2002 page 18 5 2 1 PRESET of ABSOLUTE POSITION The absolute position of the measuring system can be selected optionally by manually entering the axis position value First select the axis the axis indicators is lit then the position value the right decimal point on the axis display is flashing and then confirm the entry by pressing the key ENTER the right decimal point goes out Preset of absolute position can be done in radius or in diameter
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