How to qualify a Cylinder Styli?

[[Ri...]]

I did a search here and came up empty.
As the title says, just trying to find out how to qualify a cylinder stylus.

Any information or documentation you could provide would be greatly appreciated.

[[Jo...]]

Taken from Calypso user guide

Cylinder styli.png

[[Ri...]]

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Odd that it would be there but not in the actual Calypso book/pdf that comes with the machine.
But, I'll take it!

Thank you. 😃

[[Ri...]]

The posted image has insufficient information.


Once I touch off in the direction of the shaft the machine takes off automatically and treats it like a spherical stylus, which isn't going to work. How can I change the mode to manual, or have the option to change it to manual available? "Qualify passive" is the only mode available.

How do I qualify it like the full instructions in the image shows? The options stated do not appear to be available

Vast RDS C-CAA-s XXT

[[Mi...]]

Some setups can't technically use a cylinder stylus. I can't remember if it's a limitation of the probe head or the software version, but sometimes you have to "fake" it in the software by qualifying it as a sphere probe. This only works if you have a hemispherical tip, of course.

[[Th...]]

The XXT doesn't officially support cylinder styli. What Michael said about ball-end cylindrical styli is how we've gotten around this on our own XXT-equipped machines, but I don't know that there's a workaround otherwise.

[[Ri...]]

Well this is bad news.
If I can't use cylinder cylinder probes then would I be correct to assume then that I can't use disc probes either?


Can this type of cylinder be fudged in? (you stated a hemispherical end)
626113-0151-016
https://shop.metrology.zeiss.com/INTERS ... 3-0151-016
or
https://www.itpstyli.com/OnlineShop/Pro ... M302004030

The two I already purchased are flat bottom, so I supposed I have to eat those. 🙁
Really hope the hemispherical cylinder types above will work. (fingers crossed)

[[Mi...]]

See the attached document. Also check out viewtopic.php?f=13&t=393&p=5693

This involves using a ring gauge to do a sort of manual calibration. I've tried, but found it doesn't work well if the ring gauge is very different in diameter from the part you're trying to measure.

Create_Disc_Probe_for_VAST_XXT_140315 (1) (1).pdf

[[Ri...]]

With how easy it is to build star stylus systems, I've always wondered why you would ever use a disc probe. I have never found a case for using a disc probe over a T or a star. You are so limited with what you can do with it.

Why do you need a cylinder stylus system? There are so many possible errors in the buildup that could lead to even great measurement uncertainty. Not worth it in my opinion.

[[Am...]]

We use a cylinder stylus for measuring diameters that come to a sharp edge.

[[Th...]]

Similar to that, we use cylinder styli to scan long and thin edges that a sphere stylus might slip off of due to material bend.

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Both of those would work. You would just treat it like any other stylus on your machine. However, I've found that the 1mm cylinders we use tend to qualify with larger form deviations, and the one I have installed is narrower than its expected diameter.

[[Ri...]]

I have several dove tail style o-ring grooves that terminate with a sharp edge. They're the only reason I'm even looking at cylinder probes.

I also have inside diameter groves that I cant access. Hence the Disc probes.

The reason I would prefer a disc probe over a star styli as suggested above is cost. a star sylii is 1500-3000$ depending on exptensions etc. A disc probe is 95$.

[[Da...]]

Richard, just an idea: you could also take some ordinary ruby XXT styli (with tungsten carbide shaft) and qualify the shaft itself as a cilinder probe.

for example -> https://world.probes.zeiss.com/en/Styli ... bdb48.html

I know tungsten carbide shafts tend to have small roundness, I did some measurement a while ago, not sure about other materials. But you can easily measure others and check.