Re: Erratic X

Bill,

Let's assume it's not some other stuff but the axis G201 actually
screwing up. Here's what you need to do:

1) If you have a 'scope, measure your STEP input voltage levels. The
levels have to be below 0.5V for a logic "0" and above 4.5V for a
logic "1".

2) When you say it screws up consistently, does the problem occur in
the same place in the program? If it is a drive noise problem, it
should be random in nature.

3) Since you have 2 or more drives, exchange the "problem" drive with
another one. If the problem follows the drive (Y axis now screws up
instead of the X axis), then suspect the drive. If not, it probably
is not the drive. Check your wiring; it should follow good practices
such as having a single point ground, etc.

4) Check for the unexpected stuff. What if your motor shaft coupling
is a little loose? I have seen a ratchet action under those
circumstances that mimics false step pulses.

If you continue to have problems, please contact me off-list and we
will take care of it.

Mariss

--- In CAD_CAM_EDM_DRO@y..., William Reidsema <wreidsema@y...> wrote:
> Hello Group!
> I have a recurring problem when cutting a piece
> of
> machineable wax measuring 4"x4". After about two
> inches
> of cutting perfectly, my X axis goes awry and starts
> moving and cutting off the wax.
> The G-code is fine as I have verified it. I have
> faith in my Gecko drives and I don't think they are
> the
> problem. I've changed my power options in the bios. I
> doubt it is the driver software because it worked
> perfectly until this started to happen. Why would the
> cutting proceed normally and suddenly start wandering
> to the left or right about halfway through the file?
> All I can sat is it screws up consistently!
> Any ideas from this knowledgeable group?
> Bill Reidsema