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- First we take a machine “footprint” with a RENISHAW
Ballbar to be able to demonstrate the difference of the machine
condition before and after the service work.
- Next we work on the machine geometry to minimize all mechanical
“impurities” like angular errors, axis slop, backlash,
and squareness errors etc. Leveling is done with an electronic
level with a resolution of 0.1 arcsec (0.000006”/ft). This
makes sure the positioning accuracy is consistent over the full
working envelope of the machine.
- Once the machine is leveled and any gross geometrical error
taken care of, the superior accuracy of the laser will be used
as a reference for pinpointing any minute positioning errors.
We compensate these errors in the machine’s pitch parameter
list on many different machine controls. Some of the newer controls
let us compensate straightness also.
- After all calibration work is performed we take another ball-bar
test to show the accuracy improvements of the calibration and
service work.
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