Hello Shopbot friends,,,, I have installed 3 of my 4 new pinions, even though only one, on the Z car assembly was fairly worn. In cleaning out all the gunk inside the Z housing, the rack looked good. But on both sides of the Z rail, where it engages the V-rollers, there was significant "mushrooming". This was worse than any other mushrooming than I have had on the rest of my machine. The mushrooming is on all 4 areas where the V-rollers engage the Z rail, but it is worst on the lower end (near the collet) of the Z mounting plate. The worn areas are all 5" long.
I'll of course carefully dress the mushroomed areas with a file, and make those areas match the undamaged/worn parts of the z-rails. But my question is, is this suggestive of anything being mis-adjusted that I should watch for upon reassembling? Does it suggest anything else? (Sorry, the macro function on my camera is pretty bad....)
Thank you again, Chuck
Chuck Keysor (circa 1956)
PRT Alpha 60" x 144" (circa 2004)
Columbo 5HP spindle
Aspire 8.5, Rhino 5