- Joined
- Mar 21, 2016
- Messages
- 251
ok...so one long lunch later I'm feeling better about things. I took the rail onto the surface plate and the total deviation was under .002" cool...it's as flat as I could ask for.
So I put the rail back on the base and tried Ken's method. Indicator right next to the bolt head, and starting in the middle of the rail and worked outward.
All but one of the heads was within a few tenths, and the other one was about .001 low. I kind of knew it had a low spot there as when i stoned the top the lubricant would always pool there. Cool...so after adding the appropriate shims I was curious and went back to the repeatometer trick. The whole rail is within .001 now. Cool! Starting to feel confident that it's actually flat.
so now onto measuring parallelism to the slave rail!
I swept the surface and found the high spot, set my zero and went to work. Not the best results I'm afraid. It's low as much as .010 in one area! But I feel a little lucky, I stuck a straight edge across the top of the master rail and measured the change in height to the high spot on the slave and it's within .005". Well within NSKs advertised limit. So I guess I have some shimming to do, and then onto the X axis
So I put the rail back on the base and tried Ken's method. Indicator right next to the bolt head, and starting in the middle of the rail and worked outward.
All but one of the heads was within a few tenths, and the other one was about .001 low. I kind of knew it had a low spot there as when i stoned the top the lubricant would always pool there. Cool...so after adding the appropriate shims I was curious and went back to the repeatometer trick. The whole rail is within .001 now. Cool! Starting to feel confident that it's actually flat.
so now onto measuring parallelism to the slave rail!
I swept the surface and found the high spot, set my zero and went to work. Not the best results I'm afraid. It's low as much as .010 in one area! But I feel a little lucky, I stuck a straight edge across the top of the master rail and measured the change in height to the high spot on the slave and it's within .005". Well within NSKs advertised limit. So I guess I have some shimming to do, and then onto the X axis