exphiveoh
Plastic
- Joined
- Aug 28, 2017
- Location
- San Antonio
I have owned a South Bend Lathe for a couple of years and was slowly learning to use it as I worked out a few issues. My electrician had the wiring out of phase and I finally got around to experimenting with the connections at my rotary phase converter. I got that sorted out and I don't have to run it in reverse to get it to cut properly.
I recently worked on troubleshooting the speed control and discussion here was very helpful. I was puzzled because the speed control worked when I tested it under power at the seller's shop. I finally figured out that during the trip in a trailer and locating it in my garage/shop, the gear on the small motor to move the Reeves pully became disengaged from the gear on the Reeves pulley. The speed control works but the tachometer on the headstock is not displaying the speed. The needle occasionally jumps to the right and returns to the left position.
The speed control does adjust the speed of the spindle. I use a laser hand-held tachometer to determine the speed. That is working, for now, so I'll get to the point.
The clutch to move the saddle under power will not engage. The half nut does engage and the saddle moves in the neutral position. If I engage either the longitudinal movement or the crossfeed with the toggle in the up or down position respectively, nothing happens
I have tried following the directions I found in a couple of maintenance manuals for South Bend 14 lathes that appeared to be similar to mine did not fix this.
The manuals state:
TO ADJUST CLUTCH
The clutch lever on my SBL 14 has the set screw "U" as pictured below. I have loosened it, however, when I turn the clutch lever, nothing happens. There does not feel to be any change in the tightness of the nut.[/INDENT]
I recently worked on troubleshooting the speed control and discussion here was very helpful. I was puzzled because the speed control worked when I tested it under power at the seller's shop. I finally figured out that during the trip in a trailer and locating it in my garage/shop, the gear on the small motor to move the Reeves pully became disengaged from the gear on the Reeves pulley. The speed control works but the tachometer on the headstock is not displaying the speed. The needle occasionally jumps to the right and returns to the left position.
The speed control does adjust the speed of the spindle. I use a laser hand-held tachometer to determine the speed. That is working, for now, so I'll get to the point.
The clutch to move the saddle under power will not engage. The half nut does engage and the saddle moves in the neutral position. If I engage either the longitudinal movement or the crossfeed with the toggle in the up or down position respectively, nothing happens
I have tried following the directions I found in a couple of maintenance manuals for South Bend 14 lathes that appeared to be similar to mine did not fix this.
The manuals state:
TO ADJUST CLUTCH
1. With allen wrench, loosen set screw "U" and turn lever clockwise until clutch engages in proper position. (see Figs 10-11). Clutch lever should not go beyond the perpendicular to the thrust collar "R".
2. Clutch lever should be just tight enough to stay engaged in a heavy cut. If clutch is too loose, repeat steps outlined above. If too tight, turn clutch lever counter-clockwise in steps outlined above.
2. Clutch lever should be just tight enough to stay engaged in a heavy cut. If clutch is too loose, repeat steps outlined above. If too tight, turn clutch lever counter-clockwise in steps outlined above.
The clutch lever on my SBL 14 has the set screw "U" as pictured below. I have loosened it, however, when I turn the clutch lever, nothing happens. There does not feel to be any change in the tightness of the nut.[/INDENT]