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3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Input Voltage | 24–75 VDC |
| Continuous Current | 7 A |
| Control Type | Advanced Vector (sine-wave commutated) |
| Command Interface | Step & Direction (digital position) |
| Additional Modes | Torque / velocity (model dependent) |
| Feedback | Encoder (compatible with AVS motors) |
| Key Features | High bandwidth closed-loop, no cogging at low speed, low jitter |
| Cooling | Efficient, cool-running design |
| Compatible Motors | AVS series (M172, M233, M234, M343, etc.) |
| Status | Discontinued by manufacturer |
4. Product Introduction
The Bearing Engineers AVS-1700-ACX is an Advanced Vector Servo drive from the AVS 1700 series. It delivers DSP-controlled, sine-wave commutated brushless servo performance while accepting simple step-and-direction pulses for position control—combining the ease of a stepper interface with closed-loop servo accuracy.
This drive is used in applications that need smooth low-speed motion, high bandwidth response, and freedom from torque ripple or hunting. It remains a practical replacement for existing AVS 1700 installations in packaging, assembly, and precision motion systems where the original drive has failed.
AVS-1700-ACX
AVS-1700-ACX
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No motor motion | Drive disabled, no power, or command missing | ✅ High | Verify 24–75 VDC supply; check Enable and Step/Dir signals | Confirm power and command signals first |
| Motor hunts or vibrates | Tuning or feedback issue | ✅ High | Check encoder connections and cable shielding | Inspect feedback wiring; re-tune if necessary |
| Over-current or fault LED | Shorted motor leads or overload | ✅ High | Measure motor winding resistance; check load | Clear mechanical bind or replace drive if internal fault |
| Intermittent operation | Loose connectors or noise | ✅ Medium | Reseat all connectors; check grounding | Improve cable routing and shielding |
| Drive does not accept step pulses | Interface mismatch or wiring error | ✅ High | Verify Step/Dir polarity and voltage levels | Match controller output to drive input specs |
If the problem continues, record all LED states, supply voltage, and command signal presence, then contact technical support with photos of the connections.
6. Frequently Asked Questions (FAQ)
Q: Is the AVS-1700-ACX still in production?
A: No. It is discontinued. New-surplus and fully tested refurbished units are the available options for maintaining existing systems.
Q: What command interface does it use?
A: Primary interface is digital step-and-direction for position control. Certain variants also support analog torque or velocity modes.
Q: What supply voltage is required?
A: 24–75 VDC. Confirm your power supply can deliver the continuous and peak current required by the connected motor.
Q: Can it run any brushless motor?
A: It is designed for the AVS motor series (M172, M233, M234, M343, etc.). Using non-matched motors may require parameter changes and is not guaranteed.
Q: Does it need tuning software?
A: Yes. Bearing Engineers AVS-ServoSet software is used for setup, tuning, and limit configuration. Have the original parameters or a backup before replacement if possible.
Q: Can I hot-swap this drive?
A: No. Always disable the drive and remove power before connecting or disconnecting the motor or control cables.
Q: Why choose a tested refurbished unit?
A: These drives are no longer manufactured. Fully tested units restore motion capability quickly while carrying a warranty, avoiding the long lead times of scarce new-surplus stock.
