Disc stylus qualifying

[[Zo...]]

Trying to qualify a custom disc stylus on our Contura with VAST XT for the first time and it isn't recognized by Calypso. I tried following instructions online, got a reference probe copied, Diameter adjusted to the disc diameter, set up a ring gage on the table, ran a program to measure the ID, but when I insert the disc probe, the control doesn't recognize it, so cannot run it to compare the measurements, as the instruction said.

Can anyone provide proven steps to set up a disc stylus to measure ID groove with a step?

[[Du...]]

I believe an XT you would just qualify manually as normal, I think the steps you are following are meant for an XXT. 

 there may be something in this post that may help you

[[Zo...]]

Please sign in to view this quote.

I never qualified a probe manually, always automatic, and when I tried to do it today with the disc, it didn't like it.

I will need to read up on what information it needs, what to use as a reference, ( maybe the 1" ball...) and what else to consider, like shaft direction, which I guess would be the stem/shaft above the disc, then the "Z" moves down to the center of the sphere to probe it laterally, along "X" and "Y"...etc

 

[[Mi...]]

You are way over complicating this if you have an XT machine. I don't have instructions handy, but XT can properly calibrate Discs without doing anything crazy. Like all probes the first time is manual. You tell it that it's a disc, and follow the steps. I usually do 2 4 point circles, then let the machine redo what I did from scratch.

 

I'm sure there's a knowledge base article on this too, if not there should be.

 

XXT requires questionable methods to calibrate a Disc....

[[Du...]]

there is, https://portal.zeiss.com/knowledge-base?id=420710 

Please sign in to view this username.

 here you go, try this and let us know if it works out

[[Du...]]

there is a dropdown where you would select disk and it should automatically set it to manual, if not the dropdown for that is right next to it

[[Zo...]]

Please sign in to view this quote.

Thanks

[[Zo...]]

I was able to qualify the stylus manually, but I wasn't able to define the disc diameter and thickness. I didn't think they need to be defined but the initial measurements are off, by a lot, like the Z move for the rim diameter should be Z -.111, but in reality it is at -0.061, which would make sense taking half the thickness of the .10 disc into consideration, but in my view, it should be -.111+.05=-.161,  and it isn't. So I am still trying to fine tune it and verify that it setup properly. Not sure how, because I am not sure of what the stylus is missing. It was manually calibrated, seemed happy, but apparently it isn't making ME happy. 

I, by the way am mostly interested in measuring DIA 5.777, hence the need for the custom-made disc, precision ground in house from M42 stock, all other dimensions can be done with standard probes.

[[Zo...]]

I am not sure where the manually qualified disc probe's bottom is assumed to be, at what Z depth, my guess would be +0.05 with a 0.10 thickness, but this is what the "Z zero" looks like on the table, with reference to the base alignment: 

 

[[To...]]

Maybe this will help

[[Du...]]

Not 100% sure but i do believe Z zero would be the bottom of your theoretical sphere, its been a while since ive used one on a non CAD program but i think you would need to compensate for that.