Re: need help compiling EMC

[John Sheahan <jrsheahan-at-optushome.com.au>]

using steppermod or freqmod?

stepper motors are pretty slow. You need lots of volts available 
, say 10x the nominal motor voltage , to get much speed out of them.

and the realtime parts of emc will limit you to say 10k steps/second 
anyway (depending on your ini settings)

you need to supply a little more relevant information.
john



On Fri, Aug 02, 2002 at 01:18:27PM -0400, Hassan Rabe wrote:
> 
> hello list.
> i have a problems with controlling a stepper motor...that delivers 0.25
> degree per pulse...when i calculated the required pulses per inch ...it was
> 11520..which i think a lot....but it worked out fine with EMC.....but my
> problem is that i can't get the feed rate to go over 9....and the axis speed
> to go over 10....the settings are in inches...
> the motor is a 2 phase unipolar stepper motor...2A DC, ...i built the
> controller ..its mainly an EDE1200 microcontroller and a some transistors,
> diods and resistors...when i go over the above values...the motor starts to
> vibrate without moving...am not sure if this is EMC problem or controller or
> the motor...it's really frosterating ...after you build the hole thing...and
> it's moving so slow...that you can't notice it's moving...
> please help
> 
> hassan
> 
>