Hopefully someone can help with this, as I am pretty stuck at this point.
Recently purchased Mori Seiki SL-4 with Fanuc 6TB. Was running prior to purchase, but sat for a few months before it was recently powered up.
On startup, zero return for X works ok, including when it starts close to end of travel (reversing, then going forward again). Z worked ok once, but on another power up, it seemed to have barreled past the normal travel limit, then shut down with a bang. After that, it shows 421 and sometimes also 423 errors. I took off the way cover and tried to turn the ball screw. It would move slightly in either direction, but everything was still frozen for the most part. The Z servo was removed and checked, and everything seems ok. Even with the servo out, the ball screw feels the same "stuck".
The turret assembly is unfortunately sitting over the mounting block on the end of the ball screw, so it is not accessible. This is making it pretty tough to release the ball screw from the turret to see if it is the ball screw or the turret that is actually locked up.
The machine looks to have traveled even further than this at some point in the past, as the heavy cover on the end of the Z ways is dented out from some previous incident.
What to do or check at this point? Anybody have any experience with this particular machine and anything like this???
Recently purchased Mori Seiki SL-4 with Fanuc 6TB. Was running prior to purchase, but sat for a few months before it was recently powered up.
On startup, zero return for X works ok, including when it starts close to end of travel (reversing, then going forward again). Z worked ok once, but on another power up, it seemed to have barreled past the normal travel limit, then shut down with a bang. After that, it shows 421 and sometimes also 423 errors. I took off the way cover and tried to turn the ball screw. It would move slightly in either direction, but everything was still frozen for the most part. The Z servo was removed and checked, and everything seems ok. Even with the servo out, the ball screw feels the same "stuck".
The turret assembly is unfortunately sitting over the mounting block on the end of the ball screw, so it is not accessible. This is making it pretty tough to release the ball screw from the turret to see if it is the ball screw or the turret that is actually locked up.
The machine looks to have traveled even further than this at some point in the past, as the heavy cover on the end of the Z ways is dented out from some previous incident.
What to do or check at this point? Anybody have any experience with this particular machine and anything like this???