Confused hole on 2nd (X plus) workplane

[Devaney]

Running a program and when I go to the X plus to check hole diamter and location the probe enters the hole well below the center line and continues to probe from that location. When plate checked the part comes out right and all other features seem to be utilizing the correct prehit and retract distances.

Does anyone know what I did to get it this way? And how do I correct it?

[John Kingston]

Is it an autofeature or learned? Take a look at your theoreticals versus actuals. They should be very similar. If you can, post a copy of that section of your program. Some of the gurus here may see something that's out of wack.

[Paul Sarrach]

You are in the correct plane and your target vectors are correct?

[Devaney]

CIR19789 =FEAT/CIRCLE,RECT,IN,LEAST_SQR
THEO/1.2726,-6.9925,1.7089,1,0.0000014,0,0.2502
ACTL/1.272,-7.0026,1.7488,1,0,0,0.2511
MEAS/CIRCLE,5,WORKPLANE

I think I see what your saying. The 1.7089 theo is .040 off of the actl. Should I check copy to actuals. Someone told me there is some bad Voodoo with copy to actuals.

[Devaney]

You are in the correct plane and your target vectors are correct?

Yea, I'm pretty sure thats all good.

[george frick]

DO YOU HAVE A GOOD PROBE CALIBRATION FOR THAT ROTATION?

[Devaney]

DO YOU HAVE A GOOD PROBE CALIBRATION FOR THAT ROTATION?

I just calibrated and it looks great. Good idea though, I should have checked that right away.

[george frick]

LOOKS LIKE YOUR ONLY OUT IN Z. TAKE A MANUAL HIT ON A FLAT SURFACE IN Z ON THE PART & SEE WHERE YOUR AT. .040 OFF? WE CAN GO FROM THERE.

[John Kingston]

Where should the hole be in zaxis? Your theo. should be that.

[J Temmen]

CIR19789 =FEAT/CIRCLE,RECT,IN,LEAST_SQR
THEO/1.2726,-6.9925,1.7089,1,0.0000014,0,0.2502
ACTL/1.272,-7.0026,1.7488,1,0,0,0.2511
MEAS/CIRCLE,5,WORKPLANE

I think I see what your saying. The 1.7089 theo is .040 off of the actl. Should I check copy to actuals. Someone told me there is some bad Voodoo with copy to actuals.

The hole has an X vector so the Z offset wouldn't affect the depth it measures at.You need to look at the X coordinate. Use auto features to measure the circle with sample hits to find the X face then adjust the nominal if nesc.

[Devaney]

LOOKS LIKE YOUR ONLY OUT IN Z. TAKE A MANUAL HIT ON A FLAT SURFACE IN Z ON THE PART & SEE WHERE YOUR AT. .040 OFF? WE CAN GO FROM THERE.

Everything looks good there too. This is an older program and it's taking readings well enough. I've taken and changed the theos to the print and it seems to run better.