Description
Product Introduction
The Kollmorgen AKM22E-ANB2R-00 is a 58 mm AKM-series brushless synchronous servo motor for compact, dynamic machine axes. It is used in packaging, indexing, conveyor, and light robotic-motion applications where repeatable positioning and responsive acceleration are required.
This exact configuration includes an E winding, 2-pole single-turn resolver, smooth shaft, IEC/N flange, two SpeedTec Ready connectors, and a 24 VDC holding brake. The brake is the practical distinction from non-brake AKM variants: it holds the shaft when drive power is removed, which matters on vertical slides and suspended loads.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Kollmorgen |
| Series | AKM Synchronous Servo Motors |
| Motor type | Three-phase permanent-magnet synchronous servo motor |
| Frame / flange | 58 mm AKM2 frame, IEC flange, accuracy class N |
| Winding | E winding |
| Feedback | 2-pole single-turn inductive resolver |
| Rated power | 0.58 kW |
| Stall torque | 0.86 Nm |
| Rated current | 2.7 A RMS |
| Maximum DC bus voltage | 320 VDC |
| Rated speed | 8000 rpm |
| Peak torque | Approximately 2.7 Nm |
| Phase-to-phase resistance | 5.22 ohms at 25 °C |
| Brake | Integrated 24 VDC holding brake |
| Shaft | Smooth shaft, no shaft seal |
| Connectors | Two SpeedTec Ready connectors |
| Protection | IP54 |
| Insulation class | Class F |
| Ambient temperature | 5–40 °C |
| Weight | 3.170 kg |
| Standards | EN 60034-1, EN 60034-5 |
Application Scenarios & The “Trench” Experience
A vertical pick axis holds position while the machine waits, then drifts a few millimeters after the servo disables. Operators blame the encoder or PLC. More often, the holding brake is worn, its 24 VDC supply is marginal, or someone replaced a brake-equipped motor with a non-brake version. The AKM22E-ANB2R-00 exists precisely for that class of problem.
- Packaging machinery – Vertical product-feed or pick-and-place axes – Required because the integrated 24 VDC brake prevents load drop or drift when the servo is disabled.
- Automated assembly – Compact indexing and positioning axes – Required for resolver-based commutation and repeatable motion in a 58 mm envelope.
- Conveyor and material handling – Short-stroke diverting, lifting, or indexing motion – Required for the motor’s 0.86 Nm stall torque, 8000 rpm rating, and compact mounting.
- Semiconductor and laboratory automation – Small vertical Z-axis stages – Required for controlled holding torque and closed-loop feedback without adding a separate brake assembly.
- Legacy machine repair – Direct replacement of a failed brake-equipped AKM22E motor – Required because feedback, connector, shaft, and brake options are model-specific.
Field case study: A packaging machine’s vertical discharge axis began dropping slightly during every stop. Maintenance replaced the servo amplifier, but the drift continued. The brake leads showed correct nominal voltage, yet the brake would not fully release and re-engage cleanly. A tested AKM22E-ANB2R-00 restored normal holding behavior. Total downtime was less than one shift; the earlier amplifier swap solved nothing.
AKM22E-ANB2R-00
AKM22E-ANB2R-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 model label, flange condition, shaft condition, connector threads, brake leads, and signs of impact, moisture, or prior disassembly.
- Anti-counterfeit check: Compare nameplate layout, housing construction, connector hardware, and rotor behavior against known Kollmorgen AKM examples.
- Live rig testing: Connect to a compatible Kollmorgen servo amplifier, confirm resolver recognition, commutation, and stable closed-loop torque/speed operation.
- Brake verification: Apply the specified 24 VDC to the brake circuit; confirm clean release, reliable re-engagement, and measurable holding function.
- Electrical checks: Measure winding resistance and insulation resistance; check phase balance and look for shorted or degraded windings.
- Feedback verification: Rotate the shaft through a full revolution and verify stable resolver position feedback and correct commutation alignment.
- Final QC and packaging: Record test data, protect the shaft and connectors, and ship in anti-static, impact-resistant packaging.
The Veteran’s Tech Trap Guide
- ⚠️ Do not substitute a non-brake AKM22E. The
BinANB2Rindicates the integrated 24 VDC brake. Removing it changes the safety behavior of a vertical axis and can allow the load to fall. - ❗ Verify the brake supply, not just motor power. A 24 VDC brake needs the correct voltage and a properly rated control contact. Low voltage can leave the brake partially engaged; incorrect polarity or wiring can damage the brake circuit.
- ⚠️ Check the resolver pigtail before condemning the motor. Broken shields, strained pigtails, and contaminated SpeedTec connectors create feedback faults that look identical to a failed resolver.
- ❗ Confirm the amplifier’s bus voltage and feedback support. This motor is rated for a 320 VDC bus and resolver feedback; it is not a mains-connected motor and cannot run without electronic commutation.
- ⚠️ Photograph the cabling before removal. Record brake-wire colors, shield terminations, connector orientation, and any gearbox/coupling orientation. It saves an hour of debugging later.
Frequently Asked Questions
Q: Is the AKM22E-ANB2R-00 hot-swappable?
A: No. Disconnect drive power, allow the servo-drive DC bus to discharge, lock out the machine, and verify zero voltage before removing motor, feedback, or brake connectors.
Q: Does this motor include a brake?
A: Yes. It includes an integrated 24 VDC holding brake, making it suitable for vertical axes or other applications where the load must be held when power is removed.
Q: What feedback does it use?
A: A 2-pole, single-turn inductive resolver. It is not an encoder-feedback motor, so do not swap it with an AKM variant that uses SFD or other feedback without confirming drive compatibility.
Q: Can I use it with an AKD servo drive?
A: It is intended for use with compatible Kollmorgen servo amplifiers, including AKD-class drives. Confirm the drive supports resolver feedback, matches the 320 VDC bus class, and has adequate continuous and peak current capacity.
Q: Is it compatible with AKM22E-ANBNR-00?
A: Not as a direct substitute. The B versus N designation distinguishes brake-equipped from non-brake configurations; the feedback and connector arrangement must also match the installed machine design.
Q: Why is surplus stock cheaper than a new OEM motor?
A: Surplus suppliers source discontinued inventory, excess project stock, and decommissioned machines. The lower price reflects variable availability and cosmetic condition, not necessarily lower electrical quality—provided the unit has passed resolver, winding, insulation, and brake testing.
Q: What warranty should I expect?
A: For a tested refurbished or surplus unit, 12 months is a reasonable baseline. Some suppliers offer extended coverage; Radwell, for example, advertises an optional extension from two to three years.
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