[rolandkra]

Hello, I've posted this on the Fanuc forum and it may be something you could help me with here. I have a "sequencer" that may have lost some power through old batteries and that could be contributing to the problem. Please read and let me know.

"Hello to all,
I have an old Okuma Howa Millac 4 H (horizontal machining centre with pallets) and it's been "resting" for some years but now I'm resurrecting it. After I bought it at auction 3 years ago, I spent ages to clean out the solid waste that blocked every moving thing and did manage to get it running, sort of. X, Y, Z and the pallet changer all worked but I was missing some manuals and couldn't work out the tool changer.

Well it's time to try again and so far I've managed to wake it up again and have everything but the Y axis working. I can't move it by any means and it causes no error signals that I'm aware of. It's as if there was no Y axis at all. I can't zero reference it and have no joy with the hand wheel, jog or g functions. When I try to zero reference it, there is deathly silence

I can successfully run programs that use everything else. If I sneak in a line for a Y move, the program stops and helpfully advises me that I have a ref return error, but, of course I did know that.

When trying to turn the Y axis screw I get a humming and strong resistance so I think the brake is working.

There are two green LEDs lit up on the motor drive board just as on the Z and X boards.

I noticed that the spindle drops a few millimetres each time turn off the power so I think the Y axis brake releases for a fraction of a second.

At one stage when I ran the X into soft alarm I also got a 427 alarm for the Y but that's it and only the once.

After reading many of the other posts here I've checked some things such as way lube and soft alarms. Would anyone have any ideas where to go from here?
regards, Roland