[CAD_CAM_EDM_DRO] Re: CNC robotic welding arms

A while back I had entertained the idea of building a CNC plasma torch
that used rotary joints rather than linear stuff. I reasoned that this
would be a lot cheaper way to go if a person could work out the math to
use polar coordinates and translate this into step/direction.

I have since found a cheap source of linear bearnings/ways (the junk
yard) and have abandoned the rotary idea, but still think that this has
merit for a cheap way to go. Anybody else doing this? Does EMC handle
polar joints?

Later -

Mark Ehle

Dowliing, MI

>>> rab@... 05/16/02 12:39PM >>>

This is where I imagine that hard wired limit switches, E-Stops, etc.
would be critical. Possibly a floor pressure mat that would disable
the robot if anyone entered the danger zone ?

Post some picture of your lawnmower when you're finished will you ?

Rab


--- In CAD_CAM_EDM_DRO@y..., Unterhausen Umberto <unterhausen@y...>
wrote:

> I have a GE P-50 welding robot. I don't recall the
> load capacity, but it is a big robot. The thing about
> such a beast that you must keep in mind is that it can
> easily kill you. They move fast and have a long
> reach.
> The one I own was used in a Penn State lab, and
> rotation was disabled for just this reason. They got
> a motion board that didn't drive the rotation axis.
>
> I thought about putting a router on the end. I think
> it would work relatively well for at least light
> routing.
>
> I decided that getting it to work was too much
> trouble.
> I had reservations about selling my robot whole
> because it had been dropped and the electronics were
> in a flood in my basement. So I am parting it out.
> It has wonderful DC motors, which I was going to use
> on my BP, but now I may use on my gantry router, or
> more likely sell. The large metal pieces are going to
> be made into mobile robots, one to mow my yard, and
> others to be battlebots.
>
> Eric
>
> __________________________________________________
> Do You Yahoo!?
> LAUNCH - Your Yahoo! Music Experience
> http://launch.yahoo.com

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