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Author Topic: Arduino UNO + A4988
tanah
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Posts: 2
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Post Arduino UNO + A4988
on: September 25, 2014, 16:37
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Hi there!

I just wanted to make a polargraph using an Arduino UNO and Pololu A4988 stepper drivers, but I don't know where to start. Should I modify the a1 (works with Arduino UNO) or the polarshield (works with A4988) version of the controller?

I have access to a MEGA, but sadly I don't own a RAMPS. Is it too different from using bare A4988's? Maybe I can just plug them to the MEGA and use the polarshield code (being careful with the wiring and power source, of course).

Thanks in advance!
sandy
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sandy
Post Re: Arduino UNO + A4988
on: September 25, 2014, 23:08
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Hi Tanah, using RAMPS or a Polarshield is really no different to using bare A4988 breakouts - just neatly wired.

The polarshield firmware won't fit on an UNO though, so you'll need to take the regular _a1 version and copy over the configuration.ino from the polarshield branch.

The file to look in is https://github.com/euphy/polargraph_server_polarshield/blob/master/configuration.ino

Setting up is actually much more simple in the polarshield branch than it in in _a1, and it'll save you a chunk of memory too.

You will probably have to change your control pins, but should still have plenty enough.

good luck!
sn
tanah
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Post Re: Arduino UNO + A4988
on: September 26, 2014, 16:55
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Indeed, I was more concerned about the memory issue actually, but if as you suggest I can port the configuration to simplify the proccess, then that's awesome!

Thanks a lot, I'll post my results soon enough.
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