Franky6767
Plastic
- Joined
- Mar 31, 2018
So far this machine has stumped me with this vibration issue. Sounds like a soft thumping inside head stock but unsure were its actually coming from. You can disengage all speeds so that only input shaft turns and short shaft under it. Engage clutch and thumping starts....not making a sound or anything but you can feel it anywhere you lay your hand on the machine. Old 3 phase motor on lathe (5 hp) running off a newly "built" rotary phase converter. Take belts off motor runs fairly smooth....no more vibration than I would expect but Im certainly no expert. Lathe is on concrete
So far in no particular order....I have
Removed chuck.....same deal
Replaced motor pulley.....same thing...smaller pulley slower thumping rhythm
Changed belts...two different brands..........same thing
Replaced input/clutch shaft bearings......same thing.
Head stock cover off....looking hard in gears...no metal in gears or even any wear I can detect.....hose to ear.... stethoscope probe....can't tell were its coming from. Drained oil so I could really run it without getting oil showered....stethoscope...looking hard....cant see or hear exactly were its coming from.
Its almost like clutch is out of balance? Seems to engage smooth. Anyone had a motor do this....I haven't? Input/clutch shaft and short shaft under it look like they are running true....clutch engages good....brake works good....This thing has almost kicked my butt. Probably something silly but I sure ain't found it yet. Its not like its vibrating across the shop or anything....but I would think this machine should run a lot smoother if its right.
Im almost convinced its the motor somehow...cutting up under a load but I can't feel it in it. Thats gonna be a real pita pulling that heavy motor out to get checked if its for nothing.
ANy suggestions or ideas.... I would highly appreciate.
So far in no particular order....I have
Removed chuck.....same deal
Replaced motor pulley.....same thing...smaller pulley slower thumping rhythm
Changed belts...two different brands..........same thing
Replaced input/clutch shaft bearings......same thing.
Head stock cover off....looking hard in gears...no metal in gears or even any wear I can detect.....hose to ear.... stethoscope probe....can't tell were its coming from. Drained oil so I could really run it without getting oil showered....stethoscope...looking hard....cant see or hear exactly were its coming from.
Its almost like clutch is out of balance? Seems to engage smooth. Anyone had a motor do this....I haven't? Input/clutch shaft and short shaft under it look like they are running true....clutch engages good....brake works good....This thing has almost kicked my butt. Probably something silly but I sure ain't found it yet. Its not like its vibrating across the shop or anything....but I would think this machine should run a lot smoother if its right.
Im almost convinced its the motor somehow...cutting up under a load but I can't feel it in it. Thats gonna be a real pita pulling that heavy motor out to get checked if its for nothing.
ANy suggestions or ideas.... I would highly appreciate.