- Joined
- Dec 31, 2013
- Messages
- 327
Had the batteries in the Laser tach for another job, so I thought I would check the results on my SB 10 UMD with a flat belt.
The first number is what I got, the number in parenthesis is from the chart in How To Run a Lathe.
Comments:
In High I'm running slower than spec, but in low the lathe is running faster. With these results using anything in high speed except position 1 isn't much different than staying in low. Also, I don't like running this old lathe in the fastest setting so it looks like I'll won't be changing the V belt position very often.
Right now I'm using a single phase 120V motor but I still have the original 3-phase motor. I can see why people like to use a VFD with these lathes, because not only do you get the soft start but you can also nudge the motor speed up and down to get some more speed settings.
The first number is what I got, the number in parenthesis is from the chart in How To Run a Lathe.
| 1 | 2 | 3 | |
| High | 1380 (1435) | 822 (844) | 488 (502) |
| Low | 798 (706) | 469 (415) | 277 (244) |
| Back Gears (in Low) | 153 (137) | 90 (80) | 54 (48) |
Comments:
In High I'm running slower than spec, but in low the lathe is running faster. With these results using anything in high speed except position 1 isn't much different than staying in low. Also, I don't like running this old lathe in the fastest setting so it looks like I'll won't be changing the V belt position very often.
Right now I'm using a single phase 120V motor but I still have the original 3-phase motor. I can see why people like to use a VFD with these lathes, because not only do you get the soft start but you can also nudge the motor speed up and down to get some more speed settings.