pic: FRC228 Tormach CNC Mill

[peronis]

Originally Posted by magnets

I have been with 2 teams in the past few years, and the tormach experience has been... interesting. The first team had nothing but success with their machine, with the machine being run hour after hour cutting gearbox plates, wheels, sprockets, pulleys, and everything else with little to no problems. The team I'm with now, isn't too excited about the tormach. We assembled a do it yourself cnc router, and we really love the thing. We use it for prototyping all the time, and it's easy enough to use that a freshman was able to make a shooter wheel to launch frisbees by herself. Then, to cut thick aluminum and steel, we got a tormach. To begin with, the new one seemed a little more flimsy than the old one. (they were both PCNC 1100) While none of the axes or tables were flimsy, the back of the machine and all the little guards and panels were all wobbly. After setting up and cutting the first part (block with many holes), we noticed that the part was only accurate to about 1/2", so something was slipping. I wasn't involved much over the summer with this team, but the end result was paying $3000 to have a technician come out, replace the table, the motor, and the ballscrew, because the motor would make noise, but the output shaft wouldn't spin. Because the motor is modified by tormach with a different shaft output, if the problem fails in the modified part, you can't fix it yourself. However, the other two axis the motor worked fine, but the shaft coupling slipped on a both.

I've never used a shopbot very much, but i've heard great things about them. Also, consider used equipment if possible.

Thank you all so much for the feedback.

I noticed how you mentioned that you made sprockets, wheels, etc. with the tormach

I guess the question would be, can the shopbot do the same precision work, or has anyone made precision parts such as sprockets and gearbox parts on it?