Quote Originally Posted by brucehvn View Post
Anyway, what I've noticed is that if my current offset is set to say -10.65, when I run the G29 command, the 4 points it probes list z values close to and around that offset. However, when I run the M48 code, the numbers it reports for each sample are around the 10.24 range. The test comes out very acceptable. I can't see that there's any great fluctuation or problems with the probe, but I'm curious why the numbers are different as that amount of difference looks to be in the ballpark of what might actually get it printing properly again. I'd guess it's about .4mm off.

Bruce
Bruce,

Did you figure this out? I'm having the same issue. G29 results seem to vary quite a bit but M48 results are very consistent and differ from the G29 resutls. And, like you, the difference seems like it would explain my occassional air prints. It seems the two should produce similar measurements. If not, it would be nice to have an explanation as to why.