Vik Olliver wrote:
> Following Zach, I've just gone to finish off my stepper card. I noticed
> something a bit strange in the existing instructions though.
>
> Could I please have a ruling on whether C5 and C6 are necessary on
> either an extruder or stepper controller? The stepper board instructions
> say they're optional and yet they were included in the BOM for the
> universal assembly instructions.
They're needed for the extruder but not the stepper: they're there to
smooth the commutator noise from the motor(s). As the stepper is just
coils permanently connected, they make chunky back-EMFs when you turn
them off (which the diodes soak up) but no nasty RF interference.
--
Best wishes
Adrian
Dr Adrian Bowyer
[
staff.bath.ac.uk]
[
reprap.org]
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