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Hello Thorgal!

I've been building the toyREP for a while and today is the day I wanted to make it print. BUT, I've come to a problem. The stepper motors (I, of course, used the bipolar hack - cut the connection and desoldered the red wire) simply don't work. When I connect NEMA 17 to the Ramps, it works flawlessly, but other motors simply don't.
Z and Y - Turns okay most of the times, but in random direction. I tried various acceleration speeds (from 20 to 200) but nothing changed.
X used to "work" the same way, but now I unscrewed it to look inside, it seems like it's trying to do anything and I can feel it resonating, but the shaft doesn't turn.

I'm just wondering if you came across this problem too. If not, don't read more, but I'm gonna write something I realised, in case you know about this.

First things first: While building the ToyREP, I wanted to try the motors. They didn't work, so I was searching and searching till I found that I have to short all 3 wires under the motor driver to get it going and that's what helped me. The question is, should the pins be shorted?

When I connect a multimeter between two cables in the middle of the stepper motor (pink and orange), it starts beeping - I assume they are connected, but should they be? I tried different motor, new one. I carefully "hacked" it and it does the same, and I doubt all the motors I ordered are bad :D

Thank you very much,
Appreciate what you did for this community :)