I recently constructed a 3d printer, but when I try to have it print or manually move the motors they don’t move. I have tried plugging/replugging the motors and flashing the firmware. Sometimes it jerks then stops.

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Did you have to put the connectors onto the motors yourself? The 2 pairs of wires might not be paired up right. The stepper motor drivers could be bad, plugged in wrong, or it could simply be your current setting. Afaik, the current should usually be set to about 0.7 amps. I would probably check the current first

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Hi @Peter_Basolo are the motors receiving enough voltage? You don’t say what controller you’re using, but on many there are pots you can use to adjust the motor voltage; if it’s too low they may not be getting enough to actually drive them.

Do they move freely when unpowered?

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Its funny you mention this, about 30 minutes ago I found that my board has pots on it. I had to go to class but I’ll let you know if this works.

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All that did was add more resistance to pushing it. Should I keep turning? Will it stop turning?

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So all that did was add more resistance to pushing it. Should I keep turning it? I don’t want to go too far. Will it stop? I’m assuming turn it to the right.

depends on the pot. I have some that increase clockwise, some counterclockwise. check the documentation for your control board/stepper drivers. Often you can check the voltage between the pot and ground, and use that to determine the current setting. Try finding a forum about your control board, and see if someone else has had your problem. It seems like most pots don’t have stops, but the entire range is over 1 rotation