On Monday I was visiting my favorite scrapyard looking for more linear drive components for the 2' x 3' starter gantry I was starting to put together when I found this:
It was in a machine that was being cut up with a cutting torch as I walked up! Turns out it came out of a local transmission manufacturer's assembly line, and was used to squirt the sealant on the housings as they moved down the line. You can see the blue Hylomar on the injector in that pic. I helped them unbolt the part pictured above (they wanted to cut it out for me!) and bought all 90lbs of it for 50 cents a pound!
It is a Sankyo Seiki cartesian coordinate robot made up as follows:
X axis - THK 46 series KR linear rail and ballscrew assembly & 267 watt AC servo motor:
Y axis - THK 33 series KR linear rail and ballscrew assembly & 118 watt AC servo motor:
Z axis - 5" travel on linear rails, pnuematically actuated
Since I had a stepper drive and a couple of spare nema 23 steppers I mounted them in place of the servos. I believe they are 175ozin or somewhere around there. They were pretty easy to get mounted.
Because I got a killer deal on it I have a Microkinetics Driverack system, which is a control box that includes a USB interfaced motion control board, dual 80volt 10 amp power supplies, dual 10amp microstepping drivers, and a breakout board for all the limit switches and outputs. The MK software is horrible, but it does kind of work. I am going to start a separate thread in the main Plasma board explaining why you don't want this software and hardware...
Anyway, I made a simple tabletop table last night (I'm a welding instructor at a college) and got it all set up today. Oh - the plasma cutter is an Esab Powercut 1500 90 amp unit. Anyway, considering how bad the control system is I was able to get some decent first cuts!
Here is a 3.5" diameter circle cut in 1/8" steel at 400ipm and 80 amps. The cut was surprisingly clean; there was no cleanup before this pic:
And the bottom:
Finally, you can see a short video of the machine cutting 16 ga steel here:
[ame="http://www.youtube.com/watch?v=kYMOV5dB_gc"]YouTube- MVI_1293.AVI[/ame]