- Joined
- Mar 16, 2017
- Messages
- 145
Now that I have gotten a little experience with my new PM-1340GT I decided to recheck the leveling and see what my headstock alignment looks like. First, out of curiosity, I checked the runout of the spindle. Using a Brown and Sharpe .00005 test indicator I found the TIR to be .0001. Quite impressive. Checking the runout on my 3-jaw chuck showed a TIR of .0022. Not great but then it is not a high end chuck.
To check headstock alignment I chucked a 1.5" piece of 6061 stock and turned a band at both ends. I measured a taper of .0044 over 9 inches . Not what I wanted to see so I spent quite awhile adjusting the lathe leveling feet to remove any twist in the bed. After removing the bed twist as best I could, I rechecked the alignment and got a taper of .001 over 9 inches. I'm not sure it is worth trying to get any better at this point. I am curious as to what others are seeing when checking their headstock alignment.
Next project is a tailstock DRO.
To check headstock alignment I chucked a 1.5" piece of 6061 stock and turned a band at both ends. I measured a taper of .0044 over 9 inches . Not what I wanted to see so I spent quite awhile adjusting the lathe leveling feet to remove any twist in the bed. After removing the bed twist as best I could, I rechecked the alignment and got a taper of .001 over 9 inches. I'm not sure it is worth trying to get any better at this point. I am curious as to what others are seeing when checking their headstock alignment.
Next project is a tailstock DRO.