Re: How to get a signal to controll spindle speed?

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

A 5khz pwm will be challenging for rtlinux to 
generate.

I'd suggest a single chip micro, listening to 
direction, increase and decrease pulses, 
generating the pwm.  A PIC or the like.

Do you know what PWM mark-space limits you need, 
and how that should relate to the control signals.

john


On Fri, May 17, 2002 at 11:37:00AM -0400, Jacob Kranendonk wrote:
> 
> Hi list,
> Can anyone tell me how typically a mill with
> controllable spindle speed out the emc is being set
> up? I want somehow a possibility to controll
> laserpower by the emc software. I think I could use
> the "spindle speed" command for this purpose. But how
> do I get a signal for this, out of the emc? Does this
> take extra hardware (like a digital/analog converter
> or something), or is there a way to get a digital
> signal to. All I need as a final signal to the laser
> is a PWM (Puls With Modulated) TTL signal at 5KHZ.
> Does anyone have a sugestion how I can achieve this,
> perhaps with the help of some simple IC? Many thanks
> in advance, Jacob
> 
> 
> __________________________________________________
> Do You Yahoo!?
> LAUNCH - Your Yahoo! Music Experience
> http://launch.yahoo.com