Hi Patrick, I can easily troubleshoot ML, EL and SL 20 systems by phone or e-mail, but the MPC-29 is a bit more complex. The problem that you are describing was failry common, and there were a number of potential causes. First is to check if the drive screws have bound up, or if the belts have jumped a tooth in the gear. Loosen the gears on the servo motor and see if you can move the belt assemblies by hand. If not, it is a mechanical problem, and the multipl edrive screws have to be levelled with each other. If you can move the belt drives easily, then check the limit switches. There are roller ball limit switch the system uses to activate it's home. If the switch is not working, or if the drive is sitting on the switch when it tries to home, you may get that problem. If that is not it, then you have a problem with the electronics. I cannot troubleshoot those types of problems.
There is a company called Lake Madsen Inc that has access to the old prints, schematics and many of the old deHaart employees. The company was started by the dehaart machine shop supervisor when he found himself out of a job when the deHaart was shut down. He bought the parts, etc. at auction. His number is 781-270-5274. He also knows how to reach the electrical and software engineers that developed that system. Good luck, Jon
reply »