Reference sphere

[[Sh...]]

Hi, I normally use stylii with a DK of 1.00mm and above but I have a job coming up where I will require a DK of 0.5mm . I currently use a 25mm reference sphere. My question is will this reference sphere suffice or do i require a smaller sphere for a stylus this small, thanks in advance for any suggestions

[[To...]]

It depends on the MLE of this stylus. If it's 2.5mm, you'll probably need a smaller reference sphere.  I'm not exactly sure where the cutoff is.  I feel like anything above 5mm will be no problem.  I was able to qualify most 0.5 probes with my 25mm ref sphere.  I also noticed on one brand, not Zeiss, that there was a square shoulder between the ML and MLE, which cause the stylus to shank out.  Most styli have a taper between the 2 shanks which gave the necessary clearance.

 

[[DW...]]

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You need the 8mm sphere for 1mm and smaller styli to qualify 180° of the probe. 

[[Sh...]]

Thanks very much for your help, greatly appreciated