Yaskawa Spindle and drive issues
I have a 1995 lagun 3516 with a yaskawa vs 626vm3 drive. I had an issue where the motor wouldn't start. Give it a comand and it would turn aobut 40-50 rpms and after a minute it would alarm out the drive and give an f700 code. I was told it was the motor or encoder or a wiring problem. I had the motor rebuilt and the encoder checked. Reinstalled and had the same problem. Removed the moter and drive and sent them back. They found that the encoder was slightly out of alinement. They adjusted it sent me a video of my moter running off of my drive. Reinstalled both and the motor fired up. I ran it a various speeds and it seemed good until I had it at a high rpm and turned it off or spun the over ride down fast then it would alarm out on the drive and give a f300 code. Tech guy at lagun had mentioned that I might need to tune the motor or drive after reinstall to get it to orient correctly. I assumed this was related to the tuning that he was refering to. I called left a message and let the machine idle for about an hour then went home. Came in the next morning cranked up the machine to let it idle some more and it ran for about 20 min. max and then droped down to the 50 rpms and made the rattling sound. I made some calls got a few "i don't know what to tell you" answers. Finally go the instruction to run the motor from the drive and got the same result. I went through all of the perameters in the drive and verified them. I found 1 that was wrong but I was told some of them are adjustable. Same result after this. I messed with the plug in the motor for the encoder and then the motor cranked up and ran. It ran at a steady speed for 5-10 minutes. I messed with the overide some to change the rpm and then let it run. Withing 1-2 minutes after that it alarmed out with f800 code. rebooted the machine and checked it and it wouldn't run. Messed with the wires and it cranked up. Then I messed with the wires while it was running and it would not alarm out. Then I went to the over ride and repeated with the same results of alarming out within 1-2 minutes. Rebooted and fired it up and let it run without touching a thing. I lasted close to an hour and then alarmed out f400. Messing with the wires leads me to believe that there is a problem there which I am going to replace just to eliminate that. What concerns me and I am looking for ideas on is that the machine is not moving or vibrating and it will alarm out and yet if I move the head up and down or pull on the wires it keeps running. Could it be a bad encoder? Should a bad encoder be easy to spot when inspected? Has anyone ever seen a problem like this?
Also if anyone happens to know the procedure to change the perameters on the dynapath control to reset the tool change hieght that would be a big help.