Dave K
Diamond
- Joined
- Mar 21, 2004
- Location
- Waukesha, WI
Haas, SL10. Strange situation. When turning something kinda long, and there's a bit of a taper from front to back, we program out that taper. I'm talking about .001 - .0015 ish taper along about a 6-7 inch length. Yes, this is supported by tail stock. When working out the taper, we almost always have to go with the X axis needing to go in the plus direction as the Z is turning, or, make the side close to the chuck, larger, so it matches the front.
None of that is a big deal, but what's weird is we get this dip in the middle of the shaft that's always undersize. About .001 under, yet both ends are perfectly matching each other. However, I noticed one day when running another job, the taper had to go the other way. In otherwords, it was larger toward the chuck, so I had to taper it with a - U move while turning. When I got both ends to match each other, the dip was non-existent. So it appears when I need to trim the X in the - direction, that dip is gone, and I get a perfect straight turn.
What the hell is this? Is this a back lash issue in the X axis?
None of that is a big deal, but what's weird is we get this dip in the middle of the shaft that's always undersize. About .001 under, yet both ends are perfectly matching each other. However, I noticed one day when running another job, the taper had to go the other way. In otherwords, it was larger toward the chuck, so I had to taper it with a - U move while turning. When I got both ends to match each other, the dip was non-existent. So it appears when I need to trim the X in the - direction, that dip is gone, and I get a perfect straight turn.
What the hell is this? Is this a back lash issue in the X axis?