I’ve been thinking about getting my own mill for several years. I just like the idea of being able to shape metal. For the type of odd ball projects I like, I end up making a lot of my own parts, or customizing off the self ones. Having a mill allows me to do that easier and with much greater precision. I briefly looked at 3D printers, but parts produced on them have such low mechanical strength they really aren’t suited to my projects. Plus I like the idea supporting subtractive manufacturing (milling), as all anyone ever talks about is additive manufacturing (3d printing) these days.
Picking a mill can be a daunting task. There are so many factors to consider: price, working envelope, CNC or manual, construction, spindle type, etc. Being that I planned on operating this inside my living room, my options quickly narrowed. After much research I found several machines that fit the bill:
Little Machine Shop 3900 Solid Column mini mill
The taig and sherline are a closer match, as the LMS mill is more of a mini mill, while the others are more micro mills. The LMS mill was my favorite due to the much heavier construction, more powerful motor, and standard r8 spindle. However it is just slightly too large, on it’s own it is not that big, but when you factor in that it will need an enclosure (which is kind of a must have if you plane on running a mill inside your house) it just get’s too big.
Between the taig and sherline, I prefer the taig. It’s heavier steel construction make it much stiffer than the all aluminum sherline. Neither one will handle steel all that well, both can easily do plastic, but for aluminum the extra rigidity of the taig helps reduce chatter.
I was all set to buy a taig, but I came across a deal I could not pass up on craigslist. I got a sherline 2000 CNC ready mill, with steppers for less than 1/3rd the retail price. Whoever was using it last was cutting wood, as there are wood particles all over. It will need to be disassembled cleaned and lubed before use.
It fits very nicely on my workbench, and even when an enclosure is added it should not hog too much of the work surface. It did not have a control box, so I’ll need to start looking at stepper drivers, power supplies, and machine control software. Looking forward to this!