Re: [CAD_CAM_EDM_DRO] Re: NEWBIE WITH PLASMA/ROUTER ??'s

This sounds very exciting!
What is the thickness of material you cut?
What are the tolerances for the cut?
Alex

----- Original Message -----
From: caudlet <info@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, July 03, 2003 6:41 PM
Subject: [CAD_CAM_EDM_DRO] Re: NEWBIE WITH PLASMA/ROUTER ??'s


> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "alex" <telecomt@t...> wrote:
> > Tom,
> > how do you adjust the height - with a separate stepper?
> > Alex
> No, that's the beauty of having the Controller Software (MACH2)
> involved in the THC process. My circuit measures the tip voltage and
> gives a logic UP or DOWN signal to a parallel port pin. The software
> sees the signal and adjusts the Z axis up or down at a defined
> feedrate. you need a three axis machine but there are reasons to do
> that anyway. The advantage is that then the software "knows" where
> the head is at all times and when you get ready to retract the head,
> move and lower it again to pierce height, it can all be done easily
> in G-code. A really nice benefit is that the torch can be tapped to
> provide an "Arc Good" signal (TORCH ON input in MACH2) and the
> program will not start XY movement until it gets the signal. It
> prevents a lot of missed cuts.
>
> The circuit is one IC, some opto isolators, a few transistors, and
> some passive components. Right now all that is available is a
> schematic but soon there will be complete instructions and for non-
> commercial use (you can build one for yourself but not to resell)
> artwork for a doublesided PC board(s). If the interest is there I
> can make kits of PC board and parts available.
>
> I have been using mine now in semi-production for several weeks and
> it works great.
>
>
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