When I got this machine a couple years ago I went through the toolchanger, bored and re-sleeved some holes, replaced most of the camfollowers, greased everything, etc. It's worked great all this time. Recently it's started making a metallic sound as the arm goes up while doing it's rapid side-side wiggle like the tool is hitting the side of the spindle taper, but the only evidence I can find is a small shiny spot where the grabber is just touching one of the drive dogs (re-tuning orient position now).
Yesterday, the arm dropped both tools at once as it was pulling a tool out of the spindle. So today I pulled the enclosure off and poked at everything I can get to and all looks and feels real solid. I pulled the grippers and arm hub apart and all the parts are perfectly clean, straight and well greased as when I last assembled them.
I'm thinking that either there is some kind of lost motion in the upper mechanism that forces the gripper thumbs to lock (can't see that without pulling out 200 pounds of barrel cams and shafts) or the arm has somehow rotated on the shaft.
Anyone have a Mori MV maintenance manual that covers this toolchanger? These barrel cam/hydro-mechanical toolchangers were used starting around 1988 in all the MV40 to MV80 machines.
Yesterday, the arm dropped both tools at once as it was pulling a tool out of the spindle. So today I pulled the enclosure off and poked at everything I can get to and all looks and feels real solid. I pulled the grippers and arm hub apart and all the parts are perfectly clean, straight and well greased as when I last assembled them.
I'm thinking that either there is some kind of lost motion in the upper mechanism that forces the gripper thumbs to lock (can't see that without pulling out 200 pounds of barrel cams and shafts) or the arm has somehow rotated on the shaft.
Anyone have a Mori MV maintenance manual that covers this toolchanger? These barrel cam/hydro-mechanical toolchangers were used starting around 1988 in all the MV40 to MV80 machines.