--- In CAD_CAM_EDM_DRO@..., "Dennis Schmitz"
<denschmitz@...> wrote:
All of this talk of water jet cutters and occasionally lasers led
me
to this website.
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.,
