I have a memory problem every time I turn on the machine I get program 0 erased error message, and it can't hold any program that I upload. I am thinking its because I used a cheap 24v power supply as a replacement and after looking at the specs, I remember the 24V DC power supply needing to carry a signal. The original one is a coutant model HSH6OU and I can't find them, the one I put in as a replacement worked for a week before this problem started, but I think it might be the reason my memory is not working. any help would be appreciated on either a replacement power supply or with the memory problem.
Heidenhain TNC2500 controls
Fanuc drives
A little History
Bought this machine used and set it up in a new shop. Got the power requirements sorted out and managed to get everything working after replacing one of the 24v power supplies. After two weeks of making parts at night, I went to turn it on after a long weekend. The machine tried to home itself off the ways, luckily the tool collided with the vice and I stopped it before it went down too far. I couldn't get the Z axis off the vice so I unbolted the motor and spun it 360 degrees lifting the Z axis 4 inches. I turned the machine back on and it started doing the same thing, trying to home into the table. I had to turn the Z motor again. I called rick at heidenhain and we went through resetting the machines internal limits. After restarting it several times and getting the home positions fixed, it started giving me the proram 0 erased problem. It would not hold any programs, not even the tool library program. So - after hours of troubleshooting Rick and I determined that there was a short between earth ground and logic ground, causing interference with the signal that is carried along the 24VDC power supply. We tracked it down from the controls to somewhere else in the system, but thats as far as we got. Now - months later, I have relocated to a more affordable shop and want to get this thing going again. It has the usual program 0 erased problem with the addition of a 'ext relaydc voltage missing' problem. Before the relay problem I could operate the machine manually without the memory. Sortof lost, going to replace the power supply to a solid state style one and go from there.