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Troubleshooting and Maintenance 4-3

MN1269

 WARNING: Do not touch any circuit board, power device or electrical

connection before you first ensure that power has been
disconnected and there is no high voltage present from this
equipment or other equipment to which it is connected.  Electrical
shock can cause serious or fatal injury.  Only qualified personnel
should attempt the start–up procedure or troubleshoot this
equipment.

 WARNING: Do not remove cover for at least five (5) minutes after AC power is

disconnected to allow capacitors to discharge.  Electrical shock can
cause serious or fatal injury.

Maintenance

The only periodic maintenance required on the servo control is an occasional inspection
for accumulated dust or dirt on the heat sinks and circuit boards.  Heat sinks must be kept
clean for maximum cooling efficiency.  Also, shop dust in some environments tends to be
electrically conductive and can cause servo control malfunction.

1.

If cleaning is needed, carefully vacuum loose dirt or use dry compressed air.

2.

Remove power and ensure that bus capacitor voltage has bled down before
checking connections.

3.

Periodically check all connections and fasteners for tightness.

Servo Control Card Replacement

1.

Remove power and ensure that the bus capacitor voltage has bled down.  
DO NOT short capacitor with a screwdriver or clip lead.

2.

Measure capacitor voltage with a voltmeter or wait for 3 minutes for capacitor to
bleed off.

3.

Disconnect both of the module top edge connector by holding printed circuit
board while pulling connector away from board.

4.

Disconnect the signal–input connector in the same fashion.

5.

Loosen the chassis mounting screws (module heatsink brackets are slotted)
and slide module out from chassis.

Servo Systems Co. • 115 Main Road • P.O. Box 97 • Montville, NJ, 07045-0097 

(973) 335-1007 • Toll Free: (800) 922-1103 • Fax: (973) 335-1661 

www.servosystems.com

Summary of Contents for LD Series

Page 1: ...Servo Control Installation Operating Manual 7 98 MN1269 DC SERVO DRIVE Servo Systems Co 115 Main Road P O Box 97 Montville NJ 07045 0097 973 335 1007 Toll Free 800 922 1103 Fax 973 335 1661 www servo...

Page 2: ...Tools 1 14 Section 2 Installation 2 1 Receiving Inspection 2 1 Location Considerations 2 1 Installing the Servo Control Card 2 1 Mount the Chassis 2 2 General Wiring Considerations 2 3 Power Wiring 2...

Page 3: ...s 5 1 Current Torque Mode 5 1 Emergency Stop 5 2 Appendix A A 1 Condensed Installation Instructions A 1 Appendix B B 1 Jumper and Personality Module Settings B 1 Personality Module Current Settings B...

Page 4: ...ith by unauthorized persons misused abused or improperly installed and has been used in accordance with the instructions and or ratings supplied This warranty is in lieu of any other warranty or guara...

Page 5: ...t the start up procedure or troubleshoot this equipment WARNING Be sure all wiring complies with the National Electrical Code and all regional and local codes Improper wiring may result in unsafe cond...

Page 6: ...diately above or beside heat generating equipment or directly below water or steam pipes Caution Avoid locating control in the vicinity of corrosive substances or vapors metal particles and dust Cauti...

Page 7: ...roviding not only converted DC power to the motor but also precisely controlling current and velocity at the motor Its compact design requires very little enclosure space while its modular configurati...

Page 8: ...us AC Other standard features include 20 kHz Inaudible Switching Test Points to aid during set up Jumper Settings allow easy tailoring for specific applications Personality Module for custom current s...

Page 9: ...fy the LD Series Servo Control and Chassis The LD Series Servo Control cards can be configured with chassis to support up to four 4 axes at 160 VDC Figure 1 2 Identification Servo Systems Co 115 Main...

Page 10: ...current and responds to overload conditions beyond rated output If the comparator is tripped it disables the drive lights the Excess Current EC indicator and pulls the interlock line low if P4 is in...

Page 11: ...95 Shutdown Point Typical V 220 220 General LD2 LD4 Operating Temperature C 0 50 0 50 Weight lbs 14 20 6 Footprint inches Length 9 13 Width 10 5 10 5 Height 7 25 7 25 Notes 1 An isolation transformer...

Page 12: ...0 50 Notes 1 RMS current limit is a built in function that turns off or folds back the servo control if the continuous current is exceeded for an extended period of time The EC fault indicator identi...

Page 13: ...lso provided to verify the presence of 15 VDC PV 15 VDC MV AC for fans and logic AC and DC Bus voltage PB or BUS Bus Power Supply The bus power supply converts the 115 VAC input voltage into a DC volt...

Page 14: ...the installer to vary the overshoot or stiffness of a motor as it is commanded to change speeds Response R R pot is used to adjust the overall velocity loop gain The effect of changing the gain enabl...

Page 15: ...ule The personality module has 3 after factory adjustable settings for location see Figure 1 4 With the appropriate 1 resistor soldered into the socket peak current RMS current and the foldback level...

Page 16: ...servo control Excess Current Overtemperature EC The purpose of the EC indicator is to identify either excess RMS current or over temperature condition Ground Fault GF The purpose of the GF indicator i...

Page 17: ...medium large with 8 long shank required if replacing or adding servo control cards Add or remove modules Phillips screw driver medium Input connections to AC bus power Crescent Wrench 6 or 8 Disassem...

Page 18: ...steam pipes CAUTION Avoid locating control in the vicinity of corrosive substances or vapors metal particles and dust Several other factors should be carefully evaluated when selecting a location for...

Page 19: ...ted in General Precautions in section 1 3 Lay out the hole pattern according to the dimensions of your chassis Refer to Appendix A for dimensions 4 Cut any wiring openings needed in the cabinet debur...

Page 20: ...ntly rated wire It is suggested that power wires be run as twisted pairs i e twist the wire carrying current with the same wire returning the current Twisting the wires will reduce radiated electrical...

Page 21: ...tor and or terminal blocks Try to minimize the length of unshielded cable at these points Electrical Noise Suppression Electrical noise suppression requires a thorough system design using a combinatio...

Page 22: ...ector see Figure 2 3 2 Connect the negative side tachometer lead wire of the first servomotor to the Tach input pin 6 on the 18 position Phoenix style input signal connector see Figure 2 3 Tie the tac...

Page 23: ...itch has opened and disable its output in that direction unless the right and left limits pins 17 18 are tied to common Optional Wiring Single Voltage Input pin 4 to 2 The servo control can be configu...

Page 24: ...d to the interlock line upon switch closure the output stages of all servo control cards will be disabled i e motors will coast to a stop with no holding torque See Section 5 for additional informatio...

Page 25: ...2 8 Installation MN1269 Servo Systems Co 115 Main Road P O Box 97 Montville NJ 07045 0097 973 335 1007 Toll Free 800 922 1103 Fax 973 335 1661 www servosystems com...

Page 26: ...y clockwise Low R Response Fully counterclockwise Low C Current Limit One turn clockwise Low B Balance Leave as shipped Center Note All pots have a 15 turn range and are without a hard stop You may he...

Page 27: ...ssary to turn the T pot a few turns counterclockwise to achieve the desired speed 8 Slowly turn the C pot to the full clockwise position if the servo control s peak current is less than the rated peak...

Page 28: ...ied personnel should attempt the start up procedure or troubleshoot this equipment WARNING Do not remove cover for at least five 5 minutes after AC power is disconnected to allow capacitors to dischar...

Page 29: ...reset servo control VE Bus Voltage too high Check fuse on shunt regulator Recheck voltage and if problem still exists disconnect power to each servo control individually and isolate which servo contr...

Page 30: ...hop dust in some environments tends to be electrically conductive and can cause servo control malfunction 1 If cleaning is needed carefully vacuum loose dirt or use dry compressed air 2 Remove power a...

Page 31: ...4 4 Troubleshooting and Maintenance MN1269 Servo Systems Co 115 Main Road P O Box 97 Montville NJ 07045 0097 973 335 1007 Toll Free 800 922 1103 Fax 973 335 1661 www servosystems com...

Page 32: ...op controls the output current proportional to the input voltage VCS Typical applications requiring current mode operation are Web controls Brake applications Bolt tightening Current mode operation is...

Page 33: ...sted approach using a relay with 4 sets of contacts could be applied as shown in Figure 5 2 providing a power disconnect of motor and servo control in the event of an E stop Figure 5 2 Power Contactor...

Page 34: ...r injured Step 3 Mount the Chassis Assembly WARNING Do not apply power until all connections are made connections are checked and the safety precautions in Sections 1 are read and understood Step 4 Co...

Page 35: ...Installation Drawing 115VAC 3 phase input bus power for LD 4 115VAC 1 phase input bus power for LD 2 Servo Systems Co 115 Main Road P O Box 97 Montville NJ 07045 0097 973 335 1007 Toll Free 800 922 11...

Page 36: ...tor reduces the set values from the specifications in Section 1 Figure B 1 R96 C25 R97 C26 R98 C27 Foldback Current Level LD 3015HS Foldback Current Amps Feedback Resistance Ohms 5 453 7 715 9 1 0K 11...

Page 37: ...OFF P2 Differential Input 3 2 1 OFF ON P3 Current monitor value DCS 3 2 1 Absolute Actual P4 EC Fault Function 3 2 1 Foldback Latch P6 Amplifier Loop Mode 3 2 1 Velocity Current Potentiometer Settings...

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