28byj-48 stepper bipolar mod drill jig gridfinity
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This jig allows you to quickly modify the 28byj-48 stepper motor for bipolar control. You just need a 2.5 mm drill bit.
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- Printables
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- Tools
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- Creative Commons — Public Domain
28byj-48 stepper motor is a unipolar stepper. But to use it with better drivers that allow microstepping you need to modify it by cutting the center trace on the PCB inside the motor. Then you can drive it as a bipolar motor with drivers like A4988, DRV8834, or TMC2209. I found the process a bit annoying, so I made this jig.
All you need is a 2.5 mm drill bit. Measure the correct length of the drill first and then drill into the motor.
And then I modified it into a gridfinity version for easier storage.
