### Tip Calibration Information

The purpose of tip calibration is to calculate the distance from the second joint's center point (the A joint’s center) to the star probe’s tip center. You may want to measure more than one A,B combination so that PC-DMIS can average the star tip offsets computed, resulting in better accuracy in reaching the sphere when the CJoint calibration cycle will be performed.

Before Proceeding:

- You should already have calibrated the A,B wrist device; and the files named acomp(s).dat and wrist(m)(s).dat should exist on your computer’s hard drive.

- You need to mount a star probe on the CJoint device with the tip pointing in the X+ direction. PC-DMIS uses this tip to calibrate the CJoint. Tip calibration in this case does need to be done.

Note: You can also obtain the A,B calibration map with the CJoint mounted on the wrist. This will increase the accuracy of angle position computations for any A,B, and C angle combinations.