Parker CX-DH Stepper Motor Indexer Drive

Description

Key Technical Specifications

The Parker manual specifies 5,000 steps per revolution, a motor-supply range of +12 to +90 VDC ±10%, and a logic supply of +9 to +12 VDC at 0.3 A maximum.

The same manual gives a programmable standby-current range of 12–100% of rated motor current and a positioning range of ±8,388,607 steps from the HOME position.

Product Introduction

The Parker Compumotor CX-DH is a legacy C-Series stepper indexer/drive that combines motion sequencing and motor-drive functions in one unit. Parker’s archived documentation identifies it specifically as a C-Series Indexer/Drive and provides its electrical and motion-control specifications.

This is not the later Gemini GV6 servo-drive product described by some secondary listings. Parker’s own archive and CX-DH manual identify the unit as a stepper indexer/drive, so replacement decisions should be based on the original Compumotor system architecture and motor requirements.

Installation & Configuration Guide

Stage 1 — Pre-Installation Preparation

Estimated time: 15–30 minutes

1. Place the machine in a safe operating state.
2. Notify operations and apply the site’s LOTO procedure.
3. Isolate the motor and control power supplies.
4. Wait at least 5 minutes for stored electrical energy to dissipate.
5. Verify the DC supply is discharged with an appropriately rated multimeter.
6. Wear an ESD wrist strap when handling the CX-DH.
7. Photograph motor wiring, control wiring, switches, and configuration settings.
8. Record the motor model and rated current.
9. Back up any motion-program or configuration data before removing the drive.

⚠️ Do not substitute a CX-DH solely because the replacement is another Compumotor stepper drive. The motor supply, current rating, control interface, and motion program must match.

Stage 2 — Removing the Existing Module

Estimated time: 10–20 minutes

1. Confirm zero voltage on the applicable power circuits.
2. Label every motor and control connection.
3. Disconnect the motor only after the DC bus has been verified safe.
4. Disconnect command and I/O wiring.
5. Release the drive from its mounting arrangement.
6. Remove the CX-DH without stressing connectors.
7. Inspect wiring insulation and terminals for heat damage.
8. Keep the original drive until the replacement completes testing.

Stage 3 — Installing the Replacement

Estimated time: 15–30 minutes

1. Verify the replacement marking CX-DH.
2. Compare the hardware revision with the original unit.
3. Confirm the motor’s rated current and voltage requirements.
4. Verify the required +12 to +90 VDC motor supply range.
5. Install the drive in the original mounting position.
6. Reconnect motor phases exactly as documented.
7. Restore control wiring and configuration settings.
8. Check grounding and cable routing.
9. Inspect every connection before applying power.

⚠️ Incorrect stepper-motor phase wiring can cause immediate abnormal current behavior or prevent proper motion. Verify phase identification against the original machine documentation.

Stage 4 — Power-On & Testing

Estimated time: 30–60 minutes

1. Verify the motor supply voltage before energizing.
2. Power the control section according to the original machine procedure.
3. Check for abnormal status indications.
4. Confirm the controller can communicate with the CX-DH.
5. Verify HOME/reference operation.
6. Command a low-speed movement with no production load.
7. Check direction, step resolution, acceleration, and current settings.
8. Verify the commanded position against actual travel.
9. Test the complete motion sequence at reduced speed.
10. Return to production only after the machine passes its normal functional checks.

⚠️ Do not begin testing at production speed. First confirm motor phase wiring, current configuration, HOME position, direction, and mechanical travel limits.

CX-DH

CX-DH

FAQ

1. What is the Parker CX-DH?

The CX-DH is a Parker Compumotor C-Series Indexer/Drive designed for stepper-motor motion control. Parker’s archived product documentation categorizes it as an obsolete C-Series product.

2. Is CX-DH a servo drive?

No. The Parker documentation identifies it as a stepper indexer/drive. Secondary websites sometimes describe it as a servo or digital drive, but those descriptions conflict with Parker’s own archived documentation.

3. What is the motor supply voltage?

The Parker manual specifies +12 to +90 VDC, ±10% for the motor supply. The required voltage and current still depend on the connected stepper motor and machine configuration.

4. What is the CX-DH resolution?

The specified resolution is 5,000 steps per revolution. Parker also specifies typical unloaded, unidirectional accuracy of ±2 steps and repeatability of ±1 step.

5. Is Parker CX-DH obsolete?

Yes. Parker’s official Compumotor obsolete-product archive lists the CX-DH Indexer/Drive under the obsolete C-Series products.

6. Can another Compumotor drive directly replace CX-DH?

Not without engineering verification. Check motor voltage/current, step resolution, command interface, I/O requirements, HOME/reference behavior, mechanical travel, and the existing motion program before selecting a substitute.

7. What should I provide when sourcing a replacement?

Provide a clear photograph of the CX-DH nameplate, revision markings, motor model, motor current rating, control-system model, and all connected wiring. For this obsolete product, those details are more useful than the CX-DH designation alone.