Re: .ini documentation

[Paul <paul.corner-at-tesco.net>]

Hi Robin

200mm per rev - That sounds like a *very* coarse feed screw. Are you sure it 
is a 7.87" pitch ? (or do you already have some gearing on it ?).
Basically, SCALE is equivilent to the steps per inch or millimetre, so using 
your "one step = 0.1mm" we get :-

For steppermod with UNITS = 1
INPUT_SCALE = 10   0
OUTPUT_SCALE = 1   0

And for UNITS = 0.03937007874016
INPUT_SCALE = 254   0
OUTPUT_SCALE = 1   0

Running EMC with UNITS = 1 will probably produce following errors with the 
input scale set so low. Increasing MIN_FERROR to perhaps 0.10 might help, but 
I'd be inclined to set the machine up with imperial units and set 
RS274NGC_STARTUP_CODE to G21 if you want metric.

The P I D parameters will have no effect with steppermod, so can be safely 
ignored.

Regards, Paul.


On Wednesday 18 Sep 2002 10:51 pm, robin szemeti wrote:
> What I have is a 9m (9000mm) axis with a 200 step motor and 10:1
> microstepping (2000 pulses/rev) that provides 200mm of movement per rev.
> (ie 0.1mm per pulse) ... yes I know its only a simple matter of division or
> possibly multiplication .. but as yet I've found no clue as to divide what
> by what ... and into which of the rather odd variables to poke the value.