MP 12V Motor with 48 CPR Encoder for 25D mm Metal Gearmotors (No Gearbox)

File downloads

• Dimension diagram of the Pololu 25D Metal Gearmotors (171k pdf)

• 3D models of 25D mm gearmotors (10MB zip)

  This file contains 3D models (in the step file format) of the 25D mm gearmotors with and without encoders.

• Modifying the Wild Thumper to use motors with encoders (3MB pdf)

  Customer Richard Nguyen has documented his work modifying the Wild Thumper chassis to use 25D motors with encoders in place of the chassis’s included motors.

  Note: This is not an easy modification, and the chassis can be damaged if it is not done properly, so we generally recommend against it, and we can only provide very limited support for those who want to attempt it. The manufacturer did not intend for the chassis to be modified in this way, and we do not know how well such a modification will work out.

Recommended links

• MATLAB script to plot motor performance curves for Pololu brushed DC gearmotors

  This MATLAB script, written by Ali Asgher Mansoor Habiby, plots speed, power, current draw, and efficiency as they vary with torque when you input the gearmotor specifications. It also prints the resistance of the motor, and the current draw and torque at which maximum efficiency and maximum power occur.