I have a new-to-me DoAll 612 surface grinder. It works real well except every now and then it decides to cut about .002 deeper for just one pass then return to normal, leaving a nice low spot on my chuck right in the middle of me taking off that last .0001.
It only happens when I traverse from left to right. It only happens when I travel right up to the left stop (but not bumping into the stop).
As a workaround, every time I see it starting to do that, I get back off the chuck, move the Y until I can move left and right cutting air behind the chuck, then come back to where I was and continue where I left off.
The only thing I can think of is a piece of grit is getting into the ways and lifting the table. Do I need to tear this thing down and give it a good cleaning? Or can I just keep the oil flowing and hope all the dirt works its way out? Or is this something altogether different?
FWIW, this machine is showing multiple signs of a retarded prior owner, including a chuck that was .009 out of parallel with its travel, a bone dry reservoir in the oil pump, a 120 grit wheel that had never been balanced... I'm a total newb to grinding, but come on.
It only happens when I traverse from left to right. It only happens when I travel right up to the left stop (but not bumping into the stop).
As a workaround, every time I see it starting to do that, I get back off the chuck, move the Y until I can move left and right cutting air behind the chuck, then come back to where I was and continue where I left off.
The only thing I can think of is a piece of grit is getting into the ways and lifting the table. Do I need to tear this thing down and give it a good cleaning? Or can I just keep the oil flowing and hope all the dirt works its way out? Or is this something altogether different?
FWIW, this machine is showing multiple signs of a retarded prior owner, including a chuck that was .009 out of parallel with its travel, a bone dry reservoir in the oil pump, a 120 grit wheel that had never been balanced... I'm a total newb to grinding, but come on.