Small 0.2mm Probe Keeps Breaking

[[Er...]]

Hi all,

Our DS 0.2mm x L 18mm (626103-5122-018) keeps breaking. It has broken during re-qualificaiton at 15mN force and 5% probing dynamic and during parts inspection. While observing the probe during a qualification with a digital microscope, that probe is flexing.

Does someone also have experience with 0.2mm probes that can share some wisdom?

Thank you!

[[Ma...]]

I would exclude dynamic tensor - this probe would be better just for points - scanning can be tought for this probe

[[Er...]]

Hi Martin,

Good point. We did in fact change the qualification mode for dynamic tensor to tensor after breaking it the first time. However, while re-qualifying it, it broke again. 

We'd like to come up with a recipe that allows us to reliably use 0.2 mm probes. Avoiding scans could be a part of the recipe. 

Thank you.

[[To...]]

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Many probes have some amount of flex in them.  The function of the qualification, i.e. Tensor, Dynamic Tensor, Passive qualification, etc., is to measure the amount of flex that a stylus has, often referred to as the "bending map". Once this has been established, it is used to correctly measure features.

 

 

[[Er...]]

Hi all, 

Thank you everyone for your inputs. I used the six point calibration and the probe seems to be holding up for now.

[[Th...]]

This topic interests me because I have a small 0.65mm internal square slot to measure.  The minimum entrance diameter is most efficiently acquired by vision system by our supplier.  And now I'm trying to replicate their In-spec readings with a 0.5mm probe.  Does anyone have advice as so far I keep getting values way too high.  It appears there is an optimum depth at which to check the opening which I must hunt for.

I'm using a large 12/18/10 Prismo with VAST probe head.  

Based on the behaviour of the CMM when I tried to use Curve to hunt for the narrowest point - a probe broke - I wonder if I am using the wrong instrument, ie. such a massive gantry relative to part size.  Would a machine like the O-Inspect be better suited for such small parts?  I know a salesperson would be more than happy to give a presentation, but I don't think our company will be buying new equipment anytime soon.  

Thanks for any feedback.

Edited Tuesday at 12:38 PM

[[Ma...]]

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 Using laser or optics you are getting less deep while lowering diameter. So i would expect for 0,65mm to be depth max 1,5mm - but it's just a wild guess.