Cylindrical Styli - Flat Bottom

[[Ke...]]

Ok,,, it looks like I need to break down and buy a Cylindrical stylus... and it looks like I can't find any right away except for those with flat bottoms. Any pro tips (or links) on how to calibrate these?

[[Cl...]]

What kind of CMM head do you have? If a Vast XT, I would think you treat it as a disc probe?

[[Ke...]]

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XT

I have never has a good reason to use a disc probe, either. lol

[[Ma...]]

In the User Guide search for Qualifying Styli Manually.
There is some information on qualifying a cylindrical stylus.

[[An...]]

Calibration of a cylinder probe

Procedure:
- Calibrating a cylinder probe in manual mode
- Re-measurement on the calibration sphere
- Manual correction of the probe data

1. assemble a cylinder probe.
2. measure the probe in "cylinder" mode at the equator
of the calibration sphere, with three points in each of two
sectional planes.
3. after you have completed the calibration,
you should switch to the side of the measuring elements.
4. measure a circle at the equator of the calibration sphere.
5. compare the diameter of the circle with the
diameter of the calibration sphere.
6. the deviation from the actual diameter must be
must now be corrected.
7. open the probe data and edit the
probe radius. ( similar procedure for disk probes )
8. if necessary, repeat the process several times.

[[No...]]

I'm astonished that Zeiss always forgets to mention this (in the past they did):

With a cylindrical stylus you need to take care of the position and size of the zone where you touched the calibration sphere and you should not measure outside of that zone. Since the stylus is not spherical (like a disc stylus) every small amount of tilt from its ideal axis will later result in a position shift and a deviation of the radius/diameter if you touch your part outside of the calibrated zone. Also if that zone is too wide, it will not produce reliable results.