2012/6/20 Jeshua Lacock <jes...@3dtopo.com>:
>
> It states that those power supplies can be controlled from a TTL PWM, so I 
> assume that it will be easy to control from a standard parallel port with HAL 
> and LinuxCNC. Is that correct?

It _should_ be, based on the amount of information provided.

>
> Has anyone set up a servo or stepper drive to adjust the laser's focal point? 
> Seems easy enough, guess I am just wondering how to tie it into g-code.

IMHO You do not necessarily need it to be controlled from g-code -
manual (probably through vcp) adjustment would work as well or do You
expect the thickness and type of material to vary during single run of
g-code file?

I think that hardware design is the hardest part - those lenses will
not like dust on them, so You would like to enclose them. And then
also get them moving by a motor... I guess You will need someone more
knowledgeable about lasers to share their experience, how exactly to
set this up. I think that stepper motor would do, the problem might be
"homing" the whole lense adjustment thing, but it really much depends
on actual design, how You integrate lenses in the overall
construction.

-- 
Viesturs

If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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