Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Parker / Compumotor |
| Part Number | 87-008145-03 |
| Product Family | AXL-Drive / AX Drive |
| Product Type | Servo Drive / Microstep Drive |
| Input Voltage | 120 VAC |
| Configuration | On-board switch selectable |
| Compatible AX Models | AX57-51 |
| Compatible AX Models | AX57-83 |
| Compatible AX Models | AX57-102 |
| Compatible AX Models | AX83-62 |
| Compatible AX Models | AX83-93 |
| Compatible AX Models | AX83-135 |
| Compatible AX Models | AX106-120 |
| Motion Application | Servo / microstep motion control |
| Manufacturer Lineage | Compumotor, now associated with Parker Hannifin |
| Lifecycle | Legacy / secondary-market |
A Japanese equipment reference independently identifies 87-008145-03 as a MICROSTEP DRIVE, while another industrial equipment listing identifies it as a Parker Compumotor AXL AX83-135 drive.
Important technical qualification: The part number does not necessarily mean the drive is permanently configured as AX83-135. Artisan’s listing states that the AX Drive can be configured through onboard switches for multiple AX models. Therefore, inspect the actual switch settings before replacement rather than ordering based only on an AX83-135 reference.
Product Introduction
The Parker/Compumotor 87-008145-03 is a legacy AXL-Drive servo/microstep drive used in industrial motion-control equipment. Available technical listings identify it as a 120 VAC AX Drive, with onboard switches used to configure the drive for several AX-series motor/drive combinations.
This makes the configuration switches a critical replacement detail. A physically identical spare can still be configured incorrectly for the installed motor. Record the original switch positions and verify the motor/drive combination before applying power.
Installation & Configuration Guide
Stage 1: Pre-Installation Preparation
Estimated time: 15–25 minutes
⚠️ Safety First: The documented input is 120 VAC. Isolate the drive according to the machine’s LOTO procedure and verify the DC bus has discharged before touching internal terminals.
Tools Required:
- ESD wrist strap
- CAT-rated multimeter
- PH1/appropriate screwdriver
- Wire labels
- Smartphone/camera
- Parker/Compumotor documentation
- Motor and encoder specifications
Data Backup:
- Record 87-008145-03 exactly.
- Photograph the front and side labels.
- Photograph every configuration switch.
- Record the connected motor model.
- Record motor/encoder wiring.
- Record the machine’s motion-controller settings.
- Photograph terminal connections before removal.
- Record any external gain, limit, or feedback configuration.
⚠️ The switch configuration is not optional documentation. The same drive can be configured for different AX-series combinations.
Stage 2: Removing the Old Module
Estimated time: 10–15 minutes
- Stop the machine and place the axis in a safe state.
- Apply LOTO.
- Verify 120 VAC input is absent.
- Wait for the drive’s stored energy to discharge.
- Confirm the DC bus is at a safe voltage with an appropriate meter.
- Photograph the drive.
- Label all power, motor, feedback, and control wiring.
- Disconnect wiring without pulling on conductors.
- Remove mounting hardware.
- Remove the drive and retain it for configuration reference.
⚠️ Do not rely solely on the power LED being off to confirm the drive is safe. Measure the relevant terminals.
Stage 3: Installing the Replacement
Estimated time: 15–25 minutes
- Verify the replacement is 87-008145-03.
- Confirm the replacement has the correct electrical configuration.
- Compare the terminal layout with the original.
- Copy the original switch settings exactly.
- Verify that the selected AX configuration matches the installed motor.
- Mount the drive securely.
- Reconnect input power.
- Reconnect motor leads.
- Reconnect feedback/control wiring.
- Check grounding and shield termination.
- Verify that no conductors are loose or pinched.
Self-Checklist:
- 87-008145-03 verified
- 120 VAC input confirmed
- Switch settings copied
- Motor model verified
- Motor wiring checked
- Feedback wiring checked
- Grounding checked
- Mounting secure
Stage 4: Power-On & Testing
Estimated time: 20–45 minutes
- Perform a final wiring inspection.
- Verify there are no shorts between power conductors.
- Restore control power.
- Observe drive status indicators.
- Verify the drive initializes without a fault.
- Confirm the configured AX model.
- Enable the axis with the motor mechanically safe.
- Perform a low-speed jog.
- Verify commanded direction.
- Check encoder/feedback behavior.
- Verify limit and enable signals.
- Perform a controlled positioning test.
- Check motor current and abnormal vibration.
- Return the axis to automatic operation only after the complete motion sequence passes.
⚠️ If the motor runs in the wrong direction, stop immediately. Do not compensate by randomly changing drive parameters. First verify motor phase, feedback wiring, configuration switches, and the controller’s direction convention.

87-008145-03

87-008145-03
Frequently Asked Questions (FAQ)
What is Parker 87-008145-03?
It is a Parker/Compumotor AX-series AXL-Drive servo/microstep drive. Current industrial listings identify it as an AX Drive with 120 VAC input and switch-selectable AX-series configurations.
Is 87-008145-03 the same as an AX83-135?
Not necessarily. AX83-135 is one of the configurations supported by the drive, but the available documentation states that onboard switches can configure the AX Drive for several different AX models. Inspect the installed unit’s switch settings before assuming is the actual configuration.
What AX-series models can this drive be configured for?
The available Parker/Compumotor listing specifies:
- AX57-51
- AX57-83
- AX57-102
- AX83-62
- AX83-93
- AX106-120
The switch configuration determines the applicable AX model.
Is 87-008145-03 a PLC module?
No. It is a motion-control drive, not a conventional PLC CPU or I/O module. A separate controller typically provides the motion command/interface signals.
What voltage does 87-008145-03 require?
The available Parker/Compumotor inventory documentation specifies 120 VAC input for part number 87-008145-03.
Is 87-008145-03 obsolete?
It should be treated as a legacy Parker/Compumotor product. Current availability is primarily through industrial surplus, used-equipment, and repair channels rather than normal new-product distribution. Artisan currently lists units in its Parker product inventory.
Can I install another AX-series drive as a direct replacement?
Not automatically. The motor model, switch configuration, feedback arrangement, command interface, supply voltage, and machine controller all need to match. The safest procedure is to document the original 87-008145-03 configuration before removal and reproduce it on the replacement.
What condition should procurement specify?
For a legacy motion-control drive, specify the exact 87-008145-03 part number and request:
- Actual unit photographs
- Switch-setting photographs
- 120 VAC input confirmation
- Motor/AX configuration
- Functional test report
- Condition: New Surplus, Used Tested, or Refurbished
- Warranty period
A current secondary-market listing shows 87-008145-03 inventory and identifies the AX Drive configuration capability, so condition and configuration should be confirmed with the actual unit before purchase.

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