Description
Product Introduction
The Kollmorgen AKM12C-ANCNR-00 is a compact AKM-series brushless synchronous servo motor for small, dynamic positioning axes. Its 40 mm frame, low-inertia rotor, and resolver feedback suit packaging, assembly, printing, textile, and material-handling machinery where fast starts, stops, and accurate speed control matter.
This version uses a C winding, IEC flange with N tolerance, smooth shaft, two SpeedTec Ready connectors, and a 2-pole resolver; it has no holding brake. It must be driven by a compatible Kollmorgen SERVOSTAR/AKD servo amplifier—it is not a mains-connected motor.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Kollmorgen |
| Series | AKM Synchronous Servo Motors |
| Motor type | Brushless permanent-magnet synchronous servo motor |
| Frame size | 40 mm |
| Rotor length | 2 |
| Winding | Type C |
| Feedback | 2-pole resolver, single-turn inductive |
| Maximum DC bus voltage | 320 VDC |
| Stall torque | 0.31 Nm / 2.74 lb-in |
| Peak torque | 1.46 Nm |
| Maximum speed | 8000 rpm |
| Rated output | Approximately 0.23–0.30 kW, depending on source/rating basis |
| Peak current | 6.06 A |
| Rotor inertia | 0.031 kg·cm² |
| Shaft | Smooth, without shaft seal |
| Connectors | Two SpeedTec Ready / threaded connectors |
| Brake | None |
| Protection | IP65 |
| Insulation class | Class F |
| Ambient temperature | 5–40 °C |
| Weight | 0.49 kg |
| Lifecycle | Listed as discontinued by manufacturer |
Application Scenarios & The “Trench” Experience
A packaging line stops because one small feed axis loses position after every jog. The drive reports feedback or commutation trouble, but the mechanics look fine. On a 40 mm AKM motor, the usual suspects are a damaged resolver pigtail, connector contamination, or a motor whose bearings have finally given up—not necessarily the servo drive.
- Packaging machinery – Feed, indexing, and small conveyance axes – Required for its 40 mm footprint, low inertia, and 8000 rpm capability.
- Automated assembly – Pick-and-place or rotary indexing motion – Required for closed-loop resolver feedback and compact multi-axis installation.
- Printing and converting – Registration, tension, or auxiliary feed axes – Required for repeatable torque and speed response under frequent acceleration.
- Textile machinery – High-cycle motion axes – Required for the AKM series’ low-inertia rotor and electronic commutation design.
- Legacy machine maintenance – Direct replacement of a failed AKM12C-ANCNR-00 – Required because feedback type and connector arrangement are not freely interchangeable within the AKM range.
Field case study: A packaging OEM had one axis that ran fine at low speed but faulted during high-speed indexing. The maintenance team replaced the servo drive first; the fault returned within a week. The actual cause was a chafed resolver pigtail near the motor connector. A tested AKM12C-ANCNR-00 with intact cabling restored commutation immediately. The lesson: on small resolver motors, inspect the feedback cable before replacing expensive electronics.
AKM12C-ANCNR-00
Transparency SOP: Quality Assurance & Testing
We don’t just ship boxes; we test them on compatible Kollmorgen servo hardware where available.
- Inbound inspection: Verify the AKM12C-ANCNR-00 label, flange condition, shaft runout, connector threads, cable integrity, and evidence of water ingress or prior repair.
- Anti-counterfeit check: Compare nameplate format, housing finish, magnet/rotor behavior, and connector hardware against known Kollmorgen AKM construction.
- Live rig testing: Connect to a compatible SERVOSTAR/AKD-class amplifier, verify resolver recognition, commutation, and closed-loop torque/speed operation.
- Electrical checks: Measure winding resistance and insulation resistance; inspect for phase imbalance, shorted windings, or degraded insulation.
- Feedback verification: Confirm resolver signal integrity and stable position feedback through a full rotation.
- Bearing and mechanical checks: Listen for bearing noise, check shaft play, and inspect for abnormal drag.
- Final QC and packaging: Record test results, protect the shaft and connectors, and ship in anti-static, impact-resistant packaging.
The Veteran’s Tech Trap Guide
- ⚠️ Do not assume every AKM12C is interchangeable. The suffix matters:
ANCNR-00defines winding C, resolver feedback, IEC/N flange, smooth shaft, two connectors, and no brake. A different suffix can mean different feedback, connector, shaft, or brake configuration. - ❗ Check the feedback cable first. Resolver faults often come from broken shields, strained pigtails, or contaminated SpeedTec connectors—not the motor itself.
- ⚠️ Do not connect it directly to mains. This is a three-phase permanent-magnet servo motor requiring electronic commutation from a compatible servo amplifier.
- ❗ Confirm the DC bus voltage. The motor is specified for up to 320 VDC bus operation; using it with an incompatible drive voltage or tuning can damage the winding or degrade performance.
- ⚠️ No brake means no vertical-load holding. If the axis can fall when disabled, add an external mechanical brake or select a brake-equipped variant. This motor has no integrated brake.
Frequently Asked Questions
Q: Is the AKM12C-ANCNR-00 hot-swappable?
A: No. A servo motor is not hot-swappable. Remove drive power, wait for the DC bus to discharge, lock out the machine, and verify zero voltage before disconnecting motor or feedback connectors.
Q: Can I use it with an AKD drive?
A: It is intended for Kollmorgen servo amplifiers; AKD drives are commonly paired with AKM motors. Confirm the drive’s resolver-feedback support, voltage class, current rating, and motor database/configuration before commissioning.
Q: Does it include a brake?
A: No. The -00 AKM12C-ANCNR-00 configuration is supplied without a brake.
Q: What feedback does it use?
A: A 2-pole, single-turn inductive resolver. Do not substitute an encoder-feedback AKM without verifying drive compatibility and mechanical length.
Q: Is this motor discontinued?
A: Yes. Radwell lists the AKM12C-ANCNR-00 as discontinued by the manufacturer, so replacement stock is typically new surplus, refurbished, or used.
Q: Can I replace it with an AKM12C-AKCNC-00?
A: Not without engineering review. The AKCNC version uses SFD feedback and Intercontec connectors, while the ANCNR version uses resolver feedback and SpeedTec Ready connectors. Feedback type affects motor length and is not retrofittable.
Q: Why is surplus stock cheaper than a new OEM motor?
A: Surplus suppliers source discontinued inventory, excess project stock, and decommissioned equipment. The price can be lower, but condition, cable length, connector integrity, and test coverage vary—so insist on resolver and winding test evidence.
Q: What warranty is reasonable?
A: For a tested refurbished or surplus unit, 12 months is a fair baseline. Ensure the warranty covers functional failure, not merely cosmetic condition, and excludes damage from incorrect drive configuration or connector misuse.
Start Chat
