"Extra" Clearance ?

[[Da...]]

This isn't the first time this has happened , but I would like to know how this happens, and whether or not I can stop it from happening.

I have a tee shaped probe for checking cylindrical parts that are laying on their sides.. I run 1/2 the circle from one side then hop over and complete the circle from the other side. I have learned from experience ( crashes) that the best way to set up the clearance cube is to type it in, rather than trying to use the active probe and beep it in. So the problem is I have a small part, so I don't want a huge clearance cube. So I type in about .250"+ and minus on the side and I get well over .750 actual clearance.

I've tried reducing the clearance number but the actual clearance stays the same.

Any Ideas???

[[To...]]

Depending on size of your probe configuration, it will affect the travel. If the probe configuration is smaller that the pre-defined sensor clearance size, then clearance moves are designed to protect the sensor from entering the clearance cube. If the stylus system is larger than the pre-defined sensor clearance size, then clearance moves are based on the stylus.

Since you're using a T configuration, I'm guessing you're seeing the effects of the sensor clearance size.

[[Mi...]]

I have ran into this as well. Someone told me that the cube will be affected by which probe on the 3 way is active. I have never researched this, but What I usually do is use a singe 1 down probe, make my cube with that and I have never had an issue.

My 3 & 4 way probes follow the cube just fine even though I did not use them to make it. Funny but it works

I also add in the Cube with the jogbox and I don't manual enter coordinates.

My .02

[[Da...]]

Dave, have you seen this post? -> viewtopic.php?f=13&t=1311#p8651
Basically what Tom describes