Re: [CAD_CAM_EDM_DRO] Next step for hobby CNC

HI,

I have been working on the teach thing for about 3 years, but only in 3
axis. I believe you would need a six axis machine to do what you are
thinking about for the mig weldor teach program. It would involve what I
believe is referred to as the "backwards computations" or something like
that. It uses complex trig functions to allow the "elbows" of the welding
arms to move appropriately, while keeping the welding tip stationary. This
is necessary if you are concerned about the angle of the welding tip to the
work, when working on other than flat surfaces. I have a teach program
which works in three axi, but it is not machine independent. It is not
ready for general distribution, but I would be willing to talk a little
about it off line.

Tom Eldredge

----- Original Message -----
From: <jvicars@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, April 11, 2001 4:51 AM
Subject: [CAD_CAM_EDM_DRO] Next step for hobby CNC


> What I would like to build is a home shop welding robot. The one
> thing missing is the ability to run a program by "teaching".
>
> All the MIG robots I have seen work this way. You switch the machine
> to "Teach Mode" and manually move the welding head around the work in
> whatever path you need. While you are doing this the computer records
> the motion and translates into G-code. You have simple record, pause,
> rewind, etc.
>
> I pictured building this with steppers with encoder feedback. The
> "recording" program and the control dont' even have to be related.
> There's no reason CNCpro (or other hobby controller) couldn't run a 3
> or 4 axis robot arm. The problem right now is on the software side.
> The Gecko G201's already have the free spooling feature built in which
> would make it very easy to switch back and fourth from teach to run
> modes.
>
> Does anyone know of any software (free or cheap) that will perform
> this "recording" function as I have described? Are there some details
> that I am missing?
>
>
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