I owned a lot of the equipment at TechShop so it mostly came home. The stuff that TechShop actually owned was auctioned off a couple weeks ago. A friend picked up the 80W Rabbit 12090 for $2200.
The servo drives showed up last week and I am now trying to figure out just how I want to do this. I had though of making a lifting table for the Z axis but now I am thinking of just putting the optics on the existing Z axis on the gantry. My only worry is the little Y axis motor will not have enough oomph, its only 30W. Ill just keep things light and see what happens. I can always throw in a small DC PM motor if I am not happy.
One thing of note. I will never use Steppers again if I dont have to. The price of PM servo drives has dropped to a point where they are completely in line with steppers. The drives from http://cncdrive.com
are a good example.
Also trying to figure out what I want for a controller. The Rabbit we had used the MPC6515. It was not that bad but the software sucked eggs. There were always little issues in importing files. Once you got it in it was pretty decent and had a few advantages over the epilog software. But I am mostly looking at the controller from Full Spectrum. That looks right now to have the most promise. Though I have been around the block with new hardware that never lived up to expectations (Gecko G100, SmoothStepper).
I am probably going to install a 40W tube in the top of the machine and wrap the beam along the outside to the gantry. Since I believe the length of the tube is longer than the longest dimension of the enclosure I will probably have to install it diagonally. I have a bunch of kinematic mirror mounts lying around waiting for something like this and some real light ones that will be perfect for the flying head.
I think the next thing I really need to do is sit down and lay out boards that breakout the 30 pin flat cables that it uses to get power to the X axis encoder and up to the gantry. Also need to find a source of the FFC cables, 1mm pitch, 8 conductor, 40" Long.
Heres a pic of some of the controls. The two servo drives, Fuse holders, SSR and timer for the exhaust fan and some auxiliary relays.
Here are some of the mirror mounts I have: