[Ni...] Posted June 23, 2020 Share Posted June 23, 2020 Good Morning, We have a long probe that is 1mmX120mm. We calibrate it using a small reference sphere, tensor mode with a force of 30mN and 20% dynamic, but starts to bend when touching off on the sphere. Does anyone know if that is normal or if I need to change the force and the dynamic percentage? Looks like its going to snap. Thank You, Nixon Uruchima Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/ Share on other sites More sharing options...
[SH...] Posted June 23, 2020 Share Posted June 23, 2020 Please sign in to view this quote. What type of sensor you are using?,try it in 100mn and 50% dynamic. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83118 Share on other sites More sharing options...
[Ri...] Posted June 23, 2020 Share Posted June 23, 2020 That is an incredibly small, but long probe. I don't know how you are going to get that qualified. The lowest setting on an active head is 50mN. I don't think that is going to be low enough. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83120 Share on other sites More sharing options...
[Ni...] Posted June 23, 2020 Author Share Posted June 23, 2020 Please sign in to view this quote. What do you mean by what type of sensor? I am using Vast XT with a reference sphere of 0.15748 Radius. Contura Tensor Mode. Measuring Force for Probing System Qualification: 30mN Probing Dynamic in %: 20% Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83122 Share on other sites More sharing options...
[Ni...] Posted June 23, 2020 Author Share Posted June 23, 2020 Please sign in to view this quote. We've gotten it qualified before but it does flex/bend when doing so. Just wanted to see if that was normal or what would the normal procedure be. It is something Zeiss facility used for one of our parts when we had them build us a program. The lowest that ive done is 30mN. anything lower and the head starts going backwards after a few points. I just worry this thing will snap at any time from all the flexing. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83124 Share on other sites More sharing options...
[SH...] Posted June 23, 2020 Share Posted June 23, 2020 Please sign in to view this quote. I mean probe head ,it is vastxt. Usually l do qualification 1mm probe with 100mN and 100% dynamic, I also use vast XT. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83126 Share on other sites More sharing options...
[Ri...] Posted June 23, 2020 Share Posted June 23, 2020 Please sign in to view this quote. Wow... OK. Yeah, it's normal for it to do that if it is that unrigid. I've seen 1mmx40 do that, so I can't even imagine your stylus. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83128 Share on other sites More sharing options...
[Ri...] Posted June 23, 2020 Share Posted June 23, 2020 Please sign in to view this quote. Shabu, His problem is the fact that is probe is super long, and skinny. If it was a typical 1mmx20 or shorter he wouldn't have this problem. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83130 Share on other sites More sharing options...
[SH...] Posted June 23, 2020 Share Posted June 23, 2020 Please sign in to view this quote. It might be a stepped stylus... Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83132 Share on other sites More sharing options...
[To...] Posted June 23, 2020 Share Posted June 23, 2020 Please sign in to view this quote. The qualification routine is actually measuring the amount of bending, so yes it is normal, but I have a hard time visualizing a 1mm x 120mm probe. I can imagine it is bending a lot. Can you post a picture? Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83134 Share on other sites More sharing options...
[Ni...] Posted June 23, 2020 Author Share Posted June 23, 2020 Please sign in to view this quote. When it touches off on the sphere it touches 2 times on the same spot before moving to the next spot. The first time it backs off right after touching it but the second time it puts more force I guess until it bends and then relaxes back into position. I usually get a deviation of .0018 every time I calibrate this thing. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83136 Share on other sites More sharing options...
[SH...] Posted June 23, 2020 Share Posted June 23, 2020 Your guess is correct,the probing force will be different in second time but Zeiss will not supply a probe that cannot be calibrated. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83138 Share on other sites More sharing options...
[Ni...] Posted June 23, 2020 Author Share Posted June 23, 2020 Please sign in to view this quote. So the bending is normal? And is it ok to use 30 for force and 20% for dynamic? Zeiss employee told me to use low force and low dynamic when calibrating small probes like our 0.5mm. So that is why I have low force and dynamic for our 1mm. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83140 Share on other sites More sharing options...
[To...] Posted June 23, 2020 Share Posted June 23, 2020 Please sign in to view this quote. Yes, the bending is normal. Watch the lower right-hand corner of the LCD screen on the joystick controller box. You'll see the probing force values used for each point taken. The variation in the point readings help determine the bending map of the stylus. Thanks for the picture. Do you have a backup probe handy? 😃 Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83142 Share on other sites More sharing options...
[Ni...] Posted June 23, 2020 Author Share Posted June 23, 2020 Please sign in to view this quote. 😱 🤣 I will def ask my supervisor and engineers to put an order for extra ones. Thanks a lot for the help. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83144 Share on other sites More sharing options...
[Ch...] Posted June 23, 2020 Share Posted June 23, 2020 No way in a million years is that thing qualifying. Rotary adapter, with a knuckle, plus the length, and only 1mm. That sounds like a nightmare. I would replace the rotary adapter with a solid shaft. You need more rigidity. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83146 Share on other sites More sharing options...
[Cl...] Posted June 23, 2020 Share Posted June 23, 2020 With a probe that long wouldn't you want to use Gage Correction as well? Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83148 Share on other sites More sharing options...
[Ni...] Posted June 23, 2020 Author Share Posted June 23, 2020 Please sign in to view this quote. What is a gage correction? I am still new to CMM Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83150 Share on other sites More sharing options...
[Ni...] Posted June 23, 2020 Author Share Posted June 23, 2020 Please sign in to view this quote. Solid shaft? is that the long adapter? I have used that but then the little cube at the bottom is not straight. That is the reason I used to rotary adapter so I can straighten it out Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83152 Share on other sites More sharing options...
[Ch...] Posted June 23, 2020 Share Posted June 23, 2020 This is how I would do it. 1mmX120.png Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83154 Share on other sites More sharing options...
[Ri...] Posted June 23, 2020 Share Posted June 23, 2020 Please sign in to view this quote. I'm not a fan of trying to square up a stylus system on the MT plates that way. Unless you have the FixAssist it is a pain in the butt. I suggest using the 30mmxØ20mm Rotary Joint. I've used these religiously with great success. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83156 Share on other sites More sharing options...
[Ri...] Posted June 23, 2020 Share Posted June 23, 2020 Or you could just buy one of these. Lol. https://shop.metrology.zeiss.com/INTERS ... -US-300000 Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83158 Share on other sites More sharing options...
[Ch...] Posted June 23, 2020 Share Posted June 23, 2020 Richards idea is actually better until you bring the PO for the FixAssist and the 30mmxØ20mm Rotary Joint to management. If you really want to be accurate without the equipment then you can make cylinder on the reference sphere with the shank of the stylus to get the exact A1/A2 angles. Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83160 Share on other sites More sharing options...
[Ow...] Posted June 23, 2020 Share Posted June 23, 2020 I'd definitely want to verify the stylus accuracy by checking a ring gauge (ID) or plug gauge (OD) around the same size you're using it to check to see if it's actually measuring the size correctly. I've attached an older document on how to use the gauge correction feature but, it should still be relevant. Could probably select the F1 key and search for the current instructions.Gauge Correction Qualification inst.doc Link to comment https://qualityforum.zeiss.com/topic/15410-1mmx120mm-probe/#findComment-83162 Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in