Re: [CAD_CAM_EDM_DRO] found emc ragidness problem

armartinus wrote:

> I have one computer 300 mhz. that i have cncpro on and working fine,
> tried installing the bdi on that one but would not take. So i
> installed it on a 500 mhz machine and installed just fine, connected
> the drives and the motors sounded like tin cans draging on the ground,
> so i thought that this is what peaple were talkig about {raged steps}.
> by chance i thought to try cncpro on the 500 mhz. machine and wala,
> tin cans again.Why would cncpro work fine on the 300 mhz. machine and
> be rough on the 500 mhz. machine???? In the end i want emc to work.
> It looks that i have major interferince problems. Would an opto-
> isolator board help me in this?.If I had ground loop problems why
> does the 300 mhz. computer work? In both computers i am getting the 5
> volts from the computers for the gecko's 201.

If it has USB, disable the USB in the BIOS setup screen, and see if this
helps. It may be that, or some other function, like energy saver mode,
that is stealing time from the system without the system knowing about it.
If the motors only sound ragged when moving, but sit perfectly still when
not being commanded to move, it is not likely to be interference. It may
still be some timing difference on the step pulses, though. You don't
say what stepper drivers you are using. You should make sure you
are trying the freqmod stepper program instead of the steppermod
version, which does produce ragged step pulses.

Jon