Description
Key Technical Specifications
| Parameter | Detail |
|---|---|
| Product Family | Kollmorgen / Pacific Scientific E Series hybrid stepper |
| Model | E33NCHA-LNN-NS-00 |
| Frame Size | NEMA 34 (approx. 86 mm square) |
| Motor Type | Two-phase hybrid stepper motor |
| Step Angle | 1.8° per full step (200 steps/rev) |
| Winding | 4-lead parallel winding typical for E33 family |
| Connector | MS-style sealed connector (verify pinout from nameplate) |
| Rotor Construction | Low-inertia hybrid rotor with permanent magnet |
| Drive Compatibility | Compatible with two-phase bipolar stepper drives; microstepping recommended |
| Typical Applications | Robotics, CNC auxiliary axes, packaging, medical devices, lab automation |
| Operating Environment | Industrial indoor use; verify IP rating from nameplate |
| Exact Rating | Confirm rated current, holding torque, shaft, and winding code from nameplate |
Product Introduction
Swapping a stepper motor without checking the winding code is how you end up with a motor that runs, but runs hot, misses steps, or never reaches the original torque. The KOLLMORGEN E33NCHA-LNN-NS-00 is an E Series hybrid stepper motor in a NEMA 34 frame, originally marketed under the Pacific Scientific / Kollmorgen / Danaher Motion product families.
It uses a 1.8° step angle and a four-lead parallel winding arrangement, making it compatible with standard two-phase bipolar stepper drives. The E Series is designed for compact torque density, low rotor inertia, and smooth microstepped motion, which is why it shows up in robotics, packaging, medical analyzers, lab automation, and light CNC auxiliary axes. The “NS-00” suffix typically indicates a standard shaft and MS-style sealed connector, but the exact winding, shaft, and connector options should always be verified on the nameplate before commissioning.
QA/QC Transparency SOP
- Nameplate Verification — Record E33NCHA-LNN-NS-00, rated current per phase, winding code, shaft type, connector type, and serial number. Confirm it is an E Series NEMA 34 hybrid stepper, not an AKM servo motor.
- Mechanical Inspection — Check shaft runout, bearing play, mounting flange condition, connector pins, and seal integrity. Look for corrosion, bent pins, or prior overheating.
- Winding Resistance Test — Measure phase-to-phase resistance on all four leads. Confirm two balanced phases and no short to frame.
- Insulation Test — Verify insulation resistance between windings and motor frame. Reject units with low insulation or intermittent readings.
- Drive Compatibility Check — Match rated current and winding configuration to the existing stepper drive. Verify microstepping setting, current limit, and decay mode before running under load.
- Functional Run Test — Run at low speed, then mid-range speed, checking for missed steps, excessive heating, abnormal noise, or resonance. Record final test status and pack with nameplate photos.
Field Engineer Gotchas
- Stepper vs servo confusion — Some listings incorrectly describe E33NCHA-LNN-NS-00 as a servo motor or as part of the AKD/AKM servo family. It is an E Series hybrid stepper motor. Do not connect it to an AKD servo drive.
- Winding mismatch — E33 motors may have different winding codes. Replacing one without matching the winding can change torque, current draw, thermal behavior, and maximum speed.
- Parallel vs series wiring — A four-lead parallel-wound motor must be wired correctly for the drive. Incorrect series/parallel interpretation will reduce torque or cause drive faults.
- MS connector pinout — Even if the connector physically fits, pin assignments may differ between legacy Pacific Scientific and later Kollmorgen configurations. Verify pinout before energizing.
- Current limit tuning — Do not assume the original drive current setting is correct for a replacement unit. Set the drive current based on the replacement motor nameplate, not the old motor label.
- Shaft and mounting verification — “NS-00” suggests a standard shaft, but always confirm shaft diameter, keyway, flat, and mounting hole pattern before mechanical installation.
KOLLMORGEN E33NCHA-LNN-NS-00
Application Scenarios
- Legacy Pacific Scientific / Kollmorgen replacement — Restores motion axes where an original E33 stepper has failed or is showing bearing, winding, or connector issues.
- Packaging and labeling equipment — Provides indexed motion for feed rollers, cutters, registration axes, and tension control.
- Medical and laboratory automation — Suitable for analyzers, sample handlers, pump drives, and diagnostic equipment where smooth microstepped motion is needed.
- Robotics and light CNC auxiliaries — Used for gripper axes, tool changers, Z-axis lifts, or auxiliary positioning where a servo is not required.
FAQ
Is E33NCHA-LNN-NS-00 a stepper motor or a servo motor?
It is a hybrid stepper motor from the Kollmorgen / Pacific Scientific E Series, not an AKM/AKD servo motor.
What frame size is it?
NEMA 34, approximately 86 mm square.
What is the step angle?
1.8° per full step, or 200 steps per revolution.
Can it run on any stepper drive?
It requires a two-phase bipolar stepper drive rated for the motor’s phase current. The drive current, microstepping, and wiring must match the motor nameplate.
What does “NS-00” mean?
It indicates a standard configuration for shaft and connector options, but the exact meaning should be confirmed from the nameplate or original OEM documentation.
Is this motor still available new?
The E33 / E Series stepper family is a legacy product line. New OEM availability should be confirmed with Kollmorgen or an authorized distributor. Surplus and tested units are common; always request nameplate photos and winding verification.
