Chain drive plasma table
I built this thing last year and all but finished it off but had a bit of trouble with the torch height controller.
I didn't work on it for about 6 months due to wedding plans and I've just recently got back into getting it back on track.
I will post a few photos up here for you all to see.
I tried to buy cheap rack and pinions but couldn't get them for what my budget allowed so I ended up with a 1/2" roller chain drive which turned out rather smooth.
I first tried toothed belt but the stretch was just too much for a 3/4 .200 belt and the whole head would wobble when changing directions quickly.
I have made a few changes to the design over the year and I hope this one will last.
I think I will still change out the belt drive on the X axis for a chain drive just to make it all the same
The chain is about $36 for a 10 foot length and the sprockets are about $20 each.
You can't go under about 18 teeth on the sprockets as you end up with a bit of cogging and over 18 seems to be pretty smooth.
One modification I will try is to machine the sides of the sprockets with a slightly greater taper or make them pointier.
Rich.
I am not completely useless.......I can always serve as a BAD example.