RE: [CAD_CAM_EDM_DRO] Re: Encoders on stepper motors.

When used for steppers, INPUT_SCALE is the number of steps per inch for the
axis and OUTPUT_SCALE is the number of encoder counts per inch. If you are
using steppermod the OUTPUT_SCALE is left at 1. If using freqmod it is set
to the same value as INPUT_SCALE as the encoders are being simulated in the
software with 1 count per step. If you are using the smdromod then the
OUTPUT_SCALE number would be the actual 4X quadrature counts per inch.

I know this sounds backwards if looked at from the perspective of EMC, but
from the perspective of the motor/encoder the in and out seem right.

Tim
[Denver, CO]

> A question along the same lines for the EMC experts:
> The encoder counts coming in from the encoders could be a factor of 2
> to 10 times the step pulses EMC is issueing becase of the G340
> scaling function.
> Reading the documentation at NIST these 2 lines in the emc.ini file
> are about scaling inputs and outputs.
>
> INPUT_SCALE = 1000 0
> The inputs are in encoder counts per inch or mm.
>
> OUTPUT_SCALE = 1.000 0.000
> and the outputs are in volts for the DAC.
>
> Any clue if this OUTPUT_SCALE effects the stepper motor output rate?
>
> FAQ: http://www.ktmarketing.com/faq.html