Datums are off inside programs (All out in same direction)

Hello all,

I seem to be running into a problem with my 2way and 4way checks inside my programs. All of a sudden 2 fixtures in a row are showing an offset on my 4way and 2way 0.5mm in the same direction.
For Example I pick up the tooling balls come back check 2 way and 4way and both fixtures show they are out 0.5 mm in same direction (Machine axis). Does this make any sense ? could it be a bent probe that could be causing this issue ? I'm not sure whats going on here.

I have had this issue while using an SP25 probe system. Sometimes the styli holders don't sit right in the module - the little balls of the kinematic coupling don't line up with the grooves. This makes the probe assembly about 0.5mm longer than it should be.

More than once I have had the probe pick up the stylus holder wrong (slightly rotated), successfully calibrate the probe all while it is seated wrong, then put the probe away in the probe rack in a manner that fixes the orientation (A little V shaped notch in the probe rack can automatically fix slight rotation errors). After that the probe is picked up correctly and all the measurements are shifted by half a mm along the vector of the probe module. It can make for some really confusing measurement errors if you use lots of different probe angles.

I often wish the SP25 probe could detect this problem by using a proximity switch, check conductivity across the balls, or something.

This may not be your exact problem, especially if you use a different probe system, but it may be similar.

Hello all,

I seem to be running into a problem with my 2way and 4way checks inside my programs. All of a sudden 2 fixtures in a row are showing an offset on my 4way and 2way 0.5mm in the same direction.
For Example I pick up the tooling balls come back check 2 way and 4way and both fixtures show they are out 0.5 mm in same direction (Machine axis). Does this make any sense ? could it be a bent probe that could be causing this issue ? I'm not sure whats going on here.

I have had this issue while using an SP25 probe system. Sometimes the styli holders don't sit right in the module - the little balls of the kinematic coupling don't line up with the grooves. This makes the probe assembly about 0.5mm longer than it should be.

More than once I have had the probe pick up the stylus holder wrong (slightly rotated), successfully calibrate the probe all while it is seated wrong, then put the probe away in the probe rack in a manner that fixes the orientation (A little V shaped notch in the probe rack can automatically fix slight rotation errors). After that the probe is picked up correctly and all the measurements are shifted by half a mm along the vector of the probe module. It can make for some really confusing measurement errors if you use lots of different probe angles.

I often wish the SP25 probe could detect this problem by using a proximity switch, check conductivity across the balls, or something.

This may not be your exact problem, especially if you use a different probe system, but it may be similar.