Re: [CAD_CAM_EDM_DRO] Double Stepping???

Jerry,
The coordinates are absolute positions, so from X1 to X-1 there are 2
inches. You can change from absolute to relative coordinates with a command
but I can't tell you which from the back of my head. I'm sure someone else
will!
Hope it helps! Or have I completely missunderstood you?
/Henrik Olsson.

----- Original Message -----

> Folks:
> I'm in the debug phase of setting my Sherline Mill as a CNC unit. I'm
using
> the Camtronics amp driver and TurboCNC to drive it.
>
> I'm noticing that, after I power up the driver board and load TurboCNC, I
> can give the command: G00 X1 Y1 Z1 and all three axes move one inch in the
> proper directions. Then, if I issue the command G00 X-1 Y-1 Z-1, all three
> axes move TWO inches in the proper directions.
>
> >From then on, directing the motor to move 1 inch in either direction
causes
> a movement of two inches.
>
> My first thought was that the stepper motors were full stepping instead of
> half stepping, but that doesn't explain the fact that the first motion is
> correct. Later, I'll be connecting a scope to the full/half step pin of
the
> L297 to try to monitor what's going on there. Does anyone have any
> experience with this combination of driver software? If so, I'd appreciate
> any ideas of what is happening or where else to start looking.
>
> Thanks for your assistance,
>
> -- Jerry Jankura
> Strongsville, Ohio
> So many toys, So little time....