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CHAPTER 1.  GENERAL DESCRIPTION

1

Chapter 1.  GENERAL DESCRIPTION

Introduction

The PKC series drives are packaged versions of the CD60/80M
models designed to operate directly from either 115v or 230v AC
mains supplies*.  The built-in toroidal transformer will deliver a motor
supply voltage of either 85v or 55v DC, the lower voltage being
preferable in low-speed applications in order to minimise dissipation
in both motor and drive.  A power dump circuit is incorporated which
dissipates regenerated power during deceleration of the motor.
Other features include full short-circuit and thermal protection,
programmable motor current fold-back at standstill, and
ministepping.  Resolutions of 4000, 2000, 1000 or 400 steps/rev are
available.

A simple ramped oscillator is incorporated in the drive and this has
two speed ranges with preset speed controls.  External speed
controls may be fitted if required.  The slow speed may be set
between 400 and 10,000 steps/sec., and the fast speed between
4,000 and 100,000 steps/sec.  The fast range is ramped with an
approximate acceleration time of 120mS and a deceleration time of
60mS.  These times may be extended by the addition of a capacitor.

The PKC drives have provision for a BC7 buffered clock or RC9
ramped clock card to be fitted, and this will operate entirely
independently of the built-in oscillator.  The drives can also be used
in conjunction with Digiplan or Compumotor packaged indexers; in
this case an OPT2 opto card will be required to provide isolation
between the control system and the drive.

The PKC drive may also be fitted with an IFX indexer card.  This
version is covered by a separate user guide.

There are six drives in the range and are numbered according to the
corresponding CD drive module and the options that are fitted.  The
drive types are:

PKC60M

PKC80M

PKC60M/RC9

PKC80M/RC9

PKC60M/BC7

PKC80M/BC7

Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com

Содержание PKC Series

Страница 1: ...t Service Center Repairs Experienced Engineers and Technicians on staff in our State of the art Full Service In House Service Center Facility InstraView Remote Inspection Remotely inspect equipment be...

Страница 2: ...Close 5500 Business Park Drive Suite D Poole Dorset Rohnert Park CA 94928 England BH17 7DX USA Direct Lines for Technical Support Telephone 800 358 9070 Tel 01202 699000 Fax 01202 695750 Fax 707 584 3...

Страница 3: ...Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Страница 4: ...e of the equipment or this user guide SAFETY WARNING High performance motion control equipment is capable of producing rapid movement and very high forces Unexpected motion may occur especially during...

Страница 5: ...with two mains supply cables IEC connector to an American style 3 pin plug for use at 115V IEC connector to flying leads for use at 230V or 115V Factory Jumper Link Settings The PKC Series uses CD60M...

Страница 6: ...or changed text is differentiated with a change bar in the outside margin this paragraph is an example If an entire chapter is changed the change bar is located on the outside margin of the chapter ti...

Страница 7: ...uirements of directives 73 23 EEC Low Voltage Directive 93 68 EEC CE Marking Directive The PKC drive is sold as a complex component to professional assemblers as a component it is not compliant with E...

Страница 8: ...fitted if required The slow speed may be set between 400 and 10 000 steps sec and the fast speed between 4 000 and 100 000 steps sec The fast range is ramped with an approximate acceleration time of 1...

Страница 9: ...y DC output 24v at 250mA 500mA with external capacitor Standby current reduction 50 or 80 of full current Minimum motor inductance 0 5mH Nominal chopping frequency kHz 18 18 Maximum stepping rates 200...

Страница 10: ...over refer to Chapter 5 Removal and Replacement of Drive Module The fuses are rated as follows Fuse Number Function FS1 HV drive fuse 10A 6 3 x 32mm Use a quick blow high breaking capacity type FS2 Po...

Страница 11: ...s on the drive module which are visible through holes in the cover LED3 indicates that the 24v supply is present LED4 indicates that the high voltage supply is present It also shows that the HV capaci...

Страница 12: ...ent In the final application the equipment must be enclosed to prevent the operator coming into contact with any high voltages This includes the motor terminations The PKC drives are not EMC compliant...

Страница 13: ...rth Motor leads should be collectively screened if they run close to power switching lines particularly those driving unsuppressed inductive loads In general it is preferable to keep power connections...

Страница 14: ...Figure 2 2 Power Connector and Voltage Selector Mains AC Power Connections The drive is supplied with an AC mains supply cable having an IEC drive compatible plug at one end and an American style 3 p...

Страница 15: ...the other phase to terminals 2A and 2B To reverse the direction of rotation relative to the direction control input interchange the connections to 1A and 1B see Figure 2 3 Do not use as drive current...

Страница 16: ...erate a 42 size motor continuously close to its full rated torque In practice a typical stepper application operating at 70 of the rated torque will not overload the drive s power supply In general st...

Страница 17: ...link 2 4 Zebotronics T box 1 4 5 8 Link 2 3 link 6 7 Oriental 6 lead Black Green Red Blue Yellow White N C Sonceboz 8 lead Green Grn Wh Red Red Wh Link Org Blk Wh link Black White Japan Servo 6 lead...

Страница 18: ...tronics T box 1 2 3 4 5 6 7 8 Oriental 6 lead Black Yellow Red White Grn Blue N C Sonceboz 8 lead Grn Or Red Blk Blk Wh Grn Wh White Red Wh Japan Servo 6 lead Red White Green White Escap 8 lead Brn Br...

Страница 19: ...s numbered 16 to 30 The terminal functions are as follows Term No Terminal Function Term No Terminal Function 1 24v out 16 Positive motion limit input 2 Fault output 17 Negative motion limit input 3 Z...

Страница 20: ...with a 200 step motor It corresponds with current flowing from A to B in each motor phase At switch on the translator is always reset to the zero phase state The signal is used when establishing a mec...

Страница 21: ...nnect an external 100K potentiometer between terminals 9 and 11 and turn RV1 on the drive fully anticlockwise If the minimum speed is too high disconnect RV1 by cutting link 1 see Figure 1 2 10 FAST A...

Страница 22: ...pulses fed in during deceleration following a direction change the incoming clock should therefore be stopped until motion is not present _____________ 19 ALLOW CLOCK Connect this terminal to 0v to ru...

Страница 23: ...l variable resistor across these terminals typically 100K The maximum recommended resistor value is 2 Megohms Note that the BC7 oscillator will not respond to the slow input unless there is a resistor...

Страница 24: ...ulse source The low going input pulses should remain low for at least 10 S and the maximum permitted frequency is 20kHz It becomes the FAST MODIFY input if an RC9 is used When the motor is operating i...

Страница 25: ...IN CLOCK IN 0V Figure 2 5 Control Connections for Drive Fitted with BC7 Buffered Clock 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 TB2 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 TB1 LIMIT SWITCHES DIRN FAST...

Страница 26: ...ation time of 60mS These times may be extended by the addition of capacitor C11 a value of 22 F will give approximately double the preset times Use a dipped tantalum capacitor rated at 25 volts and ob...

Страница 27: ...preset FAST speed is also remotely adjustable and may be varied whilst the motor is running by using the FAST MODIFY facility which operates through the acceleration and deceleration circuits In this...

Страница 28: ...point A the Slow speed is called up by the Slow speed input going to logic 0 The motor is able to start immediately at the slow speed since this is set within its start stop range At B the input comma...

Страница 29: ...ented by the magnitude of the input current to the oscillator To run the motor at either the Slow or Home speed it is necessary only to feed the appropriate current into the oscillator since these spe...

Страница 30: ...his current generator is now switched off and the motor stops The remaining circuitry on the board is for controlling motor direction in conjunction with the limit interlock circuit The Direction Requ...

Страница 31: ...e Direction Request is at 0 the negative limit input inhibits motion when the Direction Request is at 1 LIMIT LIMIT DIRECTION REQUEST FAST SPEED INPUT INTERLOCK CIRCUIT DIRECTION CONTROL LATCH GENERAT...

Страница 32: ...T 0V INPUT LIMIT 1K OHMS 1 WATT a b 24V Figure 2 9 Limit Switch Configurations RC9 Ramped Clock Setting Up The most suitable method of setting up the Ramped Clock will depend on the application If def...

Страница 33: ...antaneous reversal is required without loss of synchronism If the Fast input lead was detached reconnect it and arrange to run the motor continuously at the Fast speed If this is not possible set up t...

Страница 34: ...f instantaneous reversal is required without loss of synchronism Arrange to run the motor continuously at the Fast speed Slowly rotate the Fast speed preset RV3 clockwise until the motor stalls Turn t...

Страница 35: ...ck card The resistor is normally 1K8 but this value may be increased or removed altogether The effect of such a change must be determined experimentally on the complete system DECEL ACCEL FAST SPEED H...

Страница 36: ...be used as the clock source in an indexing system Directional limit switch inputs are also included The card is available in three versions the BC7 1 has a maximum following error of 4500 at 20kHz and...

Страница 37: ...le frequency output incorporating acceleration and deceleration The output frequency will be the same as the input frequency at the end of acceleration and the total number of output pulses will equal...

Страница 38: ...ontained pulse source The oscillator has fast and slow speed ranges though both speeds may be set outside the start stop range of the motor since the necessary ramping is performed by the buffer The s...

Страница 39: ...the buffer by feeding in a known number of pulses and then adjusting the gain control for a specific speed Links 11 12 These determine the phase of the motor direction output relative to the direction...

Страница 40: ...ce Set the input frequency to the buffered clock 20 higher than the maximum required stepping rate Turn gain control fully clockwise and base speed control fully anticlockwise see Figure 2 14 Periodic...

Страница 41: ...t stalling The system is now set up with the absolute minimum following error and the next stage is to increase this by 20 to ensure reliable operation Switch the unit off and break the feedback conne...

Страница 42: ...ross the appropriate terminals Typical values are 100K for the slow control and 10K for the fast control Alternatively fixed resistors may be substituted for the links in order to change the preset sp...

Страница 43: ...36 PKC SERIES PACKAGED STEPPER DRIVES USER GUIDE Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Страница 44: ...acement procedure Drive Link Settings You can adjust the performance of a particular drive by altering the setting of links mounted upon the PSU and Translator card The layout of the links as fitted i...

Страница 45: ...ons D E F or G there is an unused position between E and F Table 3 1 Link Setting Options Standby Current Reduction The standby current reduction links allow you to reduce the motor current by a perce...

Страница 46: ...ish to use the energise input TB1 pin 7 to energise the drive link setting I must be made Motor Current Motor current may be link adjusted to the values given in Table 3 1 depending upon your applicat...

Страница 47: ...40 PKC SERIES PACKAGED STEPPER DRIVES USER GUIDE Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Страница 48: ...put must be connected to the common 0v terminal 29 TB2 The fault output terminal 30 TB2 is an open collector output and should be pulled up via a 4K7 resistor to an external supply not exceeding 24v T...

Страница 49: ...42 PKC SERIES PACKAGED STEPPER DRIVES USER GUIDE Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Страница 50: ...the reason for shutdown and the fault circuit can be reset by temporarily removing power from the drive or by taking the external reset pin TB1 pin 4 low for 1 second If the fault is due to overtemper...

Страница 51: ...If OK try reducing the acceleration rate and or start speed NO check that there are adequate clock pulses into the drive on terminal 6 The pulse should stay below 1v for at least 1 S and the level be...

Страница 52: ...to discharge wait for 2 minutes b Position the drive with the terminal blocks towards you as shown in Figure 5 1 and remove the four M3 x 10mm screws marked A The screws at the back of the unit are ho...

Страница 53: ...e cover Note that when replacing the drive silicone grease is used on the mating surfaces of the heat shunt This guarantees good thermal contact between the heaksink and heat shunt Ensure that the sin...

Страница 54: ...pairs will be carried out by Digiplan but will be processed via your supplier Digiplan may at their discretion authorise direct shipment to and from Poole or Rohnert Park but only by prior arrangement...

Страница 55: ...48 PKC SERIES PACKAGED STEPPER DRIVES USER GUIDE Artisan Scientific Quality Instrumentation Guaranteed 888 88 SOURCE www artisan scientific com...

Страница 56: ...s 37 LED functions 4 Limit 15 Link settings table 38 Mains connections 8 Mains supply 7 Mains voltage selection 5 Mains wiring size 8 Motion 15 Motion requested 16 Motor cable 9 Motor connections 8 Mo...

Страница 57: ...ification 2 Supply failure 43 Suppression circuits 6 Temperature of motor warning 9 Temperature rating of motor cable 9 Temperature operating 9 Temperature storage 9 Troubleshooting 43 Weight of drive...

Страница 58: ...t Service Center Repairs Experienced Engineers and Technicians on staff in our State of the art Full Service In House Service Center Facility InstraView Remote Inspection Remotely inspect equipment be...

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