|Forum topic by Dan Lyke||posted 01-05-2010 10:18 PM||2695 views||0 times favorited||11 replies|
01-05-2010 10:18 PM
I’ve got a bucket of bearings on order to build myself a CNC machine. I have motors and controllers left over from previous projects, I figure something on the order of 3’ or 4’ by 1.5’ or 2’ with a simple worm-drive system should be a good point to learn from. I’m thinking linear bearings made from 608ZZs on angle iron running on steel pipes, held together with ApplePly.
Here’s the question: What router should I use? This isn’t a place for the big heavy Porter Cable 7518 that I use in my table. I’ll be better off with something smaller and lighter. The carriage will move pretty slowly (and I can program it to move it slower yet if need be), I’ll probably only be using things like smaller straight and sign-making bits. What I probably want is one of the beefier trim style routers.
My wife asks “Doesn’t Festool make something that’d work?”, but the MFK 700 doesn’t look like it’s going to be easy to mount to a carriage, given that the body isn’t straight, and I’m not sure the rest of the features are important enough to me to justify the price. I’ve got the OF 1010, but the design of that too doesn’t lend itself to mounting easily.
I think I want something with a cylindrical body. Overall power isn’t a big concern, as I said head motion can be slow. I’d like at ¼” and 8mm collets, ½” would be a total bonus but definitely isn’t a dealbreaker. Variable speed is probably a good thing, but bearing quality, if I’m going to be stepping less than a thousandth of an inch at a whack I don’t want lots of runout, and durability probably trump almost everything.
-- Dan Lyke, Petaluma California, http://www.flutterby.net/User:DanLyke