I have a new passive probe and it doesn't seem to be very accurate. I used the set screws to calibrate it. I put an indicator on the probe tip and hand rotated the spindle (grabbing it up by the motor). Runout was 0.0001", so that's as good as it's gonna get. In the offsets table I entered 0.1181" for the probe diameter. I double checked the ruby diameter by measuring with a micrometer. I secured a high quality (Hermann Schmidt) 123 block to the table and measured X-axis across the 1" side. To do this I zeroed on the left side of the block, then jogged to the right side (not changing Y and setting z height the same on both sides of the block) and used the Find X- button and got a reading of 0.9908. Repeatability is very good, withing a tenth, but accuracy it terrible, over 9 thou off. I did the same on the y-axis using the 3 inch side and it read 2.9922" Again, repeatability is great, but accuracy isn't. Do I have a bad probe?