Re: EMC steps/rev calibration

Hi nahydro,

You described your encoders as 500 cpr, which refers to
counts per revolution. Encoder manufactures rate the
counts as the number of pulses generated per revolution.
The Gecko, and most circuits used with CNC, decode in
quadrature mode. This results in one increment for each
pulse edge or four times the CPR rating. This could be
cause of your 1.25 turns instead of 5 turns at the motor.

Steve Stallings
www.pmdx.com

--- In CAD_CAM_EDM_DRO@y..., "nahydro" <r_fl_z@h...> wrote:
>
> Alan:
>
> Thanks for trying. I wish it was as simple as mis reading the
jumper
> setting. I've tried all four positions, and am convinced I have
that
> part right.
>
> I am now running the G340 at 1x, 500 cpr encoder, and 5 tpi
> screw...which should make INPUT_SCALE 500*5 or 2500. I am using
> steppermod. A one inch jog results in the motor turning about 1.25
> revs instead of 5.
>
> I've pasted the relavent emc.ini for the first axes below for
> reference. If something is wrong with it, I can't see it. Is it time
> for DOS?
>
> TIA
>