Did a short video to explain the modification that is neccessary to get the

3D Printing
,
1

Did a short video to explain the modification that is neccessary to get the 28BYJ-48 steppers converted to bipolar for use with 3D printers
http://www.youtube.com/watch?v=sY1Y_BJ-fTQ

2

I’ve seen arguments about whether the cutting of the trace is necessary, and I’ve always used the motors without doing it – I just ignore the red wire. The motors have been working fine as bipolar that way, but does anybody know if I’d get better performance (or something?) if I made the modification?

3

What is the intended use of that motor in a 3D printer? I’m sorry, I couldn’t watch. I couldn’t hear past the background noise or music or whatever that is.

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@Jeff_DeMaagd Mainly cost and weight. A nema 17 costs approx. between 10 to 18 € depending on type and source, while a 28BYJ-48 is around 1,50 €. As at least 4 of them are neccessary, its almost impossible to keep total material costs beyond 100€, but thats what some projects/designs want to achieve.
Appologize for the bad sound quality. I will improve it next time.

5

@kongorilla thats an interesting point. I will have a look on that.

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@Jeff_DeMaagd intented use: axis and extruder

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How fast can they turn?

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@Jeff_DeMaagd 15 RPM