Re: more thoughts on torch height

http--unit.xjtu.edu.cn-unit-xb-zrb-01-2001-1-xbe20120.html

I dont know the voltage range but i suspect it is a high voltage at
the plasma unit and low voltage is needed for the computer to safely
process the info as rutex offers a 50:1 voltage divider for use with
their units. Also, an extensive search of options turned up the
address at the top of this reply. it goes to some foreign university
and talks about a similar system developed for welder height control.
I tried to follow it further but it goes into some other language
mayby someone else knows how to fid it in english. Thanks

Dale

--- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...> wrote:
> Dale,
>
> Give me an hour or so. What is the voltage range from min to max?
>
> Mariss
>
> --- In CAD_CAM_EDM_DRO@y..., "aspaguy" <spaguy@l...> wrote:
> > ok experts,
> > Why does the torch height control have to be separate from the
> > normal z axis? I understand that it must be controlled by the
> > changing distance from the work as opposed to being controlled by
a
> > cad drawing input, but if an encoder can tell a program to
correct
> > its course then tell a stepper or servo to respond, why couldnt a
> > short program be written based on variances in torch voltage( as
in
> > the rutex system and others) to give step and direction signals.
It
> > seems it would be only a simple if/then program ( ie:if voltage
> > increases then go clockwise, if voltage decreases, then go
counter
> > clockwise). All the torch height controls I've seen out
their
> > iclude a mechanism for moving the torch and are therefore quite
> > expensive. If someone were to come up with a system to utilize an
> > existing z axis for reliable torch height control, I would think
> > there would be a good market for it. It seems a natural for
someone
> > like Marris or Dan Mauch. I can see where it might create an
> > interface problem with current moter driver software, but, if you
> put
> > a plug on your Gecko or other driver that could be disconnected
> from
> > the computer and plugged into a black box. Or a more
sophisticated
> > programmer might write it into the torch control program that
when
> > THC is active Z axis commands from existing moter driver software
> are
> > toggled off, all being run from the computer, rather than a black
> box.
> > So what about it? Does my lack of knowledge of the facts have me
> in
> > fantasy land? or is this doable?
> > Thanks Dale