I was wondering if anyone has any sort of rule-of-thumb about how many points to take on diameters. I know that varies for size and/or maybe what kind of tolerance on the feature. I mean, I know how many hits I usually take on certain features and what works for me, but is there any sort of stuff out there that talks about recommended numbers of hits for features? Just wanted peoples thoughts on this...
One good practice is to study different methods on a ring gauge, number of hits, clockwise, anticlockwise, pre hit / retracts, touch speed's, probe size, touch trigger, scanning etc. Then check the results against the calibrated ring size.
The problem with using a ring gauge is that it doesn't take into account the process used to create the circle. If the circle is produced using a sand casting you will use way more touches than if it was made using a grinding operation.
One good practice is to study different methods on a ring gauge, number of hits, clockwise, anticlockwise, pre hit / retracts, touch speed's, probe size, touch trigger, scanning etc. Then check the results against the calibrated ring size.
The problem with using a ring gauge is that it doesn't take into account the process used to create the circle. If the circle is produced using a sand casting you will use way more touches than if it was made using a grinding operation.
