[Ke...] Posted February 18, 2021 Share Posted February 18, 2021 Wondering if anyone has any experience using a pointed stylus(?) Looking for a way to measure a shallow groove, without resorting to purchasing/using a 0.2mm probe. Any insight would be appreciated. Pointed Stylus.png Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/ Share on other sites More sharing options...
[Cl...] Posted February 18, 2021 Share Posted February 18, 2021 I'm sure my response won't help, but I would imagine the you would treat it (qualify it) like a sheet metal probe. Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/#findComment-68852 Share on other sites More sharing options...
[Ke...] Posted February 18, 2021 Author Share Posted February 18, 2021 Please sign in to view this quote. While "pointed", it has a 0.1mm radius, so I was planning on qualifying, and using it, as a standard probe. I'm just looking for something that's a little more durable than a 0.2mm dia. ruby. Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/#findComment-68854 Share on other sites More sharing options...
[Cl...] Posted February 18, 2021 Share Posted February 18, 2021 Sorry, didn't read the entire post. I jumped to a conclusion. 😃 Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/#findComment-68856 Share on other sites More sharing options...
[Se...] Posted February 18, 2021 Share Posted February 18, 2021 Hello, we also use that kind of probe for one specific measurement (a small groove profile) It has an angle of 25° and R0,1 at the end. We got that from our customer with following information for the qualifying: 1st you qualify a small ball probe Ø1 with the same length then you do the geometry re-qualification with the actual pointed stylus and 120° sphere coverage. This stylus is quite good, but you won´t reach the same accuracy than with standard ball stylus. Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/#findComment-68858 Share on other sites More sharing options...
[Ke...] Posted February 18, 2021 Author Share Posted February 18, 2021 Please sign in to view this quote. I was wondering if this may be the case... Do you have any info on how you would characterize the difference in accuracy? Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/#findComment-68860 Share on other sites More sharing options...
[To...] Posted February 19, 2021 Share Posted February 19, 2021 Back a couple of years ago, we had a request to do a demo using one of these probes to "scratch" timing lines on some glass lenses. Seemed to work ok. I was able to qualify the probe with a greatly reduce sphere coverage angle with VAST-XT head. But it wasn’t used for any measuring. Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/#findComment-68862 Share on other sites More sharing options...
[Se...] Posted February 19, 2021 Share Posted February 19, 2021 Please sign in to view this quote. We check our cmms whith a short program measuring the ceramic calibrating ball Ø25. Here you can see the position in X,Y and Z and the diameter of our last 168 measurements. As you can see, we have 2 Stylus. It seems we had some incorrect measurements . Nevertheless the mean values are not realy impacted except for item 63 and 73 .pointed probes.jpg Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/#findComment-68864 Share on other sites More sharing options...
[Er...] Posted February 19, 2021 Share Posted February 19, 2021 I would look into how the diameter MIN is getting reported as near zero. Find out how that is happening first. Then take it from there. Link to comment https://qualityforum.zeiss.com/topic/13470-pointed-stylus/#findComment-68866 Share on other sites More sharing options...
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