We Repair PMI / Kollmorgen Servomotors!
PMI Motion Technologies was the US arm of Printed Motor Works which was the first to make "pancake" motors in the 1960s. PMI was sold to Kollmorgen in the 1970s and then was collectively acquired by Danaher in the 1970s. Printed disc motors offer several benefits to traditional motors; their size and shape is an obvious one, however printed disc motors have the ability to accelerate rapidly, maintain peak torque longer and change direction faster than traditonal styles of servo motors, all without torque ripple that is present in all other styles of electic motors.
PMI servo motors come in a variety of sizes to meet almost any need.
If your motor is not represented below, please call us as our capabilities are always expanding! If your motor is not a PMI / Kollmorgen ‘click here’ to view a list of manufacturers we can service.
The Platnium Series is the direct replacement for the U-Series and S-Series motors. Available in two frame types, the U9D and U12D with twenty-four different winding options for each. Setting it apart from the U-Series was the 15-40% decrease in weight while increasing the amount of torque produced. The maximum recommended speed is 6000 RPM across the whole line and the rated terminal voltage could range from 12.5 to 60 Volts. All units with the model numbers beginning this way have a continuous stall torque of 31 oz-in to 176 oz-in or 21.9 N-cm to 124.3 N-cm. Available with optional tachometers, fail-safe brakes, alluminum armature, hardened communtator, force air cooling and optical encoders.
The U-Series is available in three frame types, the U9, U12 and U16 with six, five and two different winding options for each respectively. The maximum recommended speed is 6000 RPM across the whole line and the rated terminal voltage could range from 12.6 to 125.7 Volts. All units with this model line have a continuous stall torque between 31 oz-in to 501 oz-in or 22 N-cm to 354 N-cm. Available with optional tachometers, fail-safe brakes, and optical encoders.
S-Series servo motors were offered in one frame size with four different winding options. The recommended maximum speed is 6000 RPM and the maximum terminal voltage ranges from 17.7 to 34 Volts. All units within this series have a continuous stall torque range of 20 oz-in. and 85 oz-in, or 14 N-cm and 60 N-cm. Available with optional tachometers, fail-safe brakes, encoders, rugged housings and mil-type connectors.
The Ferrite Series servo motors are ideal for portable equipement with their small size and ability to run off low voltage. The can even run under 10 RPM without cogging. Available in two frame sizes, the 9F and 12F, with three different winding options for the 9F and nine for the 9F. All winding options have the maximum recommended speed of 6000 RPM and the maximum terminal voltage could range from 15 to 46 Volts. All models on this line have a continuous stall torque between 15 oz-in and 46 oz-in or 11 N-cm to 32 N-cm. Available along with optional tachometers, brakes, or encoders.
Sometimes having a servo motor repaired is not the best option.
Extensive motor damage or unacceptable lead times, may make replacement options a more intelligent and economical choice. Servo Repair International provides various replacement options for many Kollmorgen / PMI products. The older DC servo motors may be crossed over to newer products from PMI / Kollmorgen or other competing manufacturers. We can also provide our own direct replacement DC servo motors as replacements. Many times just a simple feedback device crossover may be needed to increase turnaround time and better performance.