Base Alignment for Summetrical Parts

[[As...]]

Hello

I am new to ZEISS Calypso, I am having troubles with measuring the slots in this part (Image attached). Some times the 0.5 mm probe misses the Slot wall. I am currently using the Face and the ID of the part for base alignment (Planar Rotation - ID, X Origin - ID, Y origin - ID and Z Origin - Top Face of the Part).

I don't understand what wrong with the program, do I need to make changes to my base alignment ?

Thanks

[[Za...]]

Yes change your base alignment and use a line or symmetry of slot to stop the rotational freedom. Then manually align the part.

[[To...]]

Please sign in to view this quote.

The object of the Planar Rotation feature is to stop rotation about the Z axis, which is centered on the ID. So, the ID cannot control rotation about Z. As Zach mentioned, using a symmetry construction from 2 lines on the slot would work. Focus on a type of feature capable of controlling rotation about the Z axis.

[[Er...]]

Are you looping the Base Alignment? i.e.
baseSystem().valueA<0.005

Using constructions in any Alignment has caused me troubles when I least need them. They can run fine, then piece 27 just loses it's mind and can't calculate the alignment.