I've seen one of the magnetic pattern tracers here
http://www.lowbucktools.com/flamecut.html
http://www.lowbucktools.com/fckit.html .

Looks like it would be simple to replicate.

Keith Marshall wrote:

"Grant Erwin" wrote in message

how to do precision cutting with a cutting torch. He describes a torch
guide which holds the torch a constant distance above the workpiece, which
guides its movement in a straight line, and which uses a "clockwork" to
control speed. I posted this recently, inquiring how this might have
worked. Well, anyway one


Are you specifically interested in the "clockwork" mechanism or in the idea
of a guided torch for precision cutting? I can't help you with the
clockwork but the track torch has been around for quite a while and I've
even run across a few at auctions. Here's more info:

http://cgi.ebay.com/Track-torch-burn...QQcmdZViewItem

http://www.esabcutting.com/products/.../ultraline.cfm

http://www.bugo.com/pdf/gofbroc.pdf

There is also a pattern tracing version that uses a motor with a magnetic
roller on it to follow the outside edge of a metal pattern a move the torch.
In fact there's a book available that has plans for one along with a few
other tools that are handy in the shop like a hydraulic press and sheetmetal
brake IIRC. I have a copy somewhere and will see if I can find it if you
want the title and author.

Best Regards,
Keith Marshall


"I'm not grown up enough to be so old!"