[sanddrag]

I converted my Sieg X1 using the HobbyCNC kit and doing my own motor mounts. I put in the extended X and Y axis kits which are really nice to have. I use TurboCNC on DOS to run it. For what I spent on it (probably around $800), I'd say it's decent. However, it's far from a real precision work-horse. It's a hobby level machine, and will get you to within about .004. It would not be suitable for milling precision fits for bearing bores for example. So long as you work within it's capabilities it can be a really valuable tool in the middle of the night to do work such as milling a hole that is bigger than you have a drill for, or for doing cutouts and pockets. I've also done some engraving on mine. I've even done some 3D milling as shown below. The problem is on the Sieg mills there's a VERY fine line in the gib adjustment between tight enough to take out slop, and binding. Also, on these low-end machines there are often problems of dovetails not being entirely flat, causing binding in one spot. It's really difficult to get it dialed in. Also on my mill, I burned out the original motor speed controller. I've only broken one of the plastic gears once. To me, the plastic gear is not a big deal if you keep spares. If you're breaking it, you've either hit something or are working over the capability of the machine. It's saving other parts from damage. For milling, plastics such as LDPE the mill works great. In aluminum, you really have to know your limits and stick to them. With a 3/8" endmill we're talking maybe no more than .030 DOC and 4 IPM. Also, plunging down is VERY chattery on this machine. Nonetheless, I still really like having it around when I need it in a pinch.

For most FRC parts, I'd say you need a bigger mill than a Sieg X1 or X2. You're better off looking for a used real mill some place. However, any mill is better than no mill.

What's your budget?

Also, do you want a machine to make projects, or do you want the machine itself to be the project?