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One of the many interesting bits of knowledge Gary has been kind enough to pass on to me is that the 12VDC connection to the Arduino Leonardo board causes the NEMA17 motor to run quite hot and to get around this he has scaled the input voltage back to 6VDC at which point that problem goes away.
I've found a waterproof buck converter modules that will provide me with 2-3 Amps of 6 volts - and another at 9 volts and I can take power from my 12 volts supply source at the scope. That's real handy. I'll start at 9vdc and see how that works and then retreat to 6 if heat is still an issue.
We live and learn.
Peter
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