CAD CAM EDM DRO - Yahoo Group Archive

Re: Now for a change of pace: PlasmaCAM

Posted by afogassa
on 2006-09-01 18:18:39 UTC
--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Dennis Schmitz"
<denschmitz@...> wrote:
>
> All of this talk of water jet cutters and occasionally lasers led
me
> to this website.
>
> http://www.plasmacam.com/
>
> Apparently you're supposed to buy your own plasma torch, but in any
> case, it's a very spartan design of an xy table with a little bit
of
> z. They claim accuracy of 0.0005 in the xy, making me curious how
they
> built the actuators and bearings. Getting both ends to move
together
> on the first axis seems an issue -- maybe a rod with rack and
pinion
> at both ends would work if you could get rid of the backlash.
>
> Notice that almost all the structural elements are bent sheet metal
> and the cable holder saves a bunch of expense from using a flexible
> wiring channel.
>
> A small handheld plasma torch is a bit expensive at $1500, but it's
> way cheaper than a laser.
>

Yeah, you can build it to do 0.0005" but the problem is that the
torch won't hold that( repeat it) as the tip wears out prety fast.
It's dificult to get a large machine built out of square tubes
strait all the way withing that 0.0005".
The positioning carriages should not be part of the cutting table.
the one I've built has step motors and rack and pinion, and a long
shaft across the table driving both sides of the table.

Fogassa.,

Discussion Thread

Dennis Schmitz 2006-09-01 11:50:25 UTC Now for a change of pace: PlasmaCAM caudlet 2006-09-01 17:29:08 UTC Re: Now for a change of pace: PlasmaCAM afogassa 2006-09-01 18:18:39 UTC Re: Now for a change of pace: PlasmaCAM Jon Elson 2006-09-01 20:03:39 UTC Re: [CAD_CAM_EDM_DRO] Now for a change of pace: PlasmaCAM turbulatordude 2006-09-01 23:47:55 UTC Re: Now for a change of pace: PlasmaCAM Ron Yost 2006-09-02 11:29:57 UTC Re: [CAD_CAM_EDM_DRO] Re: Now for a change of pace: PlasmaCAM Jon Elson 2006-09-02 19:22:56 UTC Re: [CAD_CAM_EDM_DRO] Re: Now for a change of pace: PlasmaCAM caudlet 2006-09-03 08:29:57 UTC Re: Now for a change of pace: PlasmaCAM