Re: Step motor current
Posted by
Ron Ginger
on 2000-03-09 05:59:15 UTC
Thanks for the notes. I guess the 'hand hold' test is not a good measure
of motor heat. Must be why measuring instruments are used :-)
My driver module has a pin that controls current and a table of R values
to set. I tried lowering the current to 3A, and they still worked fine,
then I lowered it to its lowest possible value- 1.5A I think, and the
motors still runs just fine, and barey get warm after 15 minutes of
operation. Using Maxnc I can drive them at 10" per minute without
loosing steps- plenty fast for a mini mill with a travel of only about 8
inches.
On the suggestion of manual feed, I had planned to do that as well. Even
if used just to setup the table it seems easier than needing software
and comand keys. I plan to just add a simple switchbox with a pot and
push button on each axis.
Tonight I should try to make my first real part on the mini.
ron
of motor heat. Must be why measuring instruments are used :-)
My driver module has a pin that controls current and a table of R values
to set. I tried lowering the current to 3A, and they still worked fine,
then I lowered it to its lowest possible value- 1.5A I think, and the
motors still runs just fine, and barey get warm after 15 minutes of
operation. Using Maxnc I can drive them at 10" per minute without
loosing steps- plenty fast for a mini mill with a travel of only about 8
inches.
On the suggestion of manual feed, I had planned to do that as well. Even
if used just to setup the table it seems easier than needing software
and comand keys. I plan to just add a simple switchbox with a pot and
push button on each axis.
Tonight I should try to make my first real part on the mini.
ron