reference sphere

[[Ün...]]

Hello everyone

We will purchase a reference sphere to be used on the Contura XXT TL3 device.
We use probes between Ø0.5 and Ø5.

Generally, we use Styli straight, ruby sphere, tungsten carbide shaft type probe.

Which one do you think is more suitable?

[[Da...]]

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Depends on the lenght of shaft, but you might be shanking with 0,5mm diameter styli on a 30mm diameter reference sphere.

[[Se...]]

Hi,

as far as I know, matt finish is specially designed for optical systems. Of course it also works fine with ball probes...

[[Cl...]]

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We have the same range of stylus sizes on our Conturas and use an 8mm reference
sphere for them all with no issues. The matte sphere is used for the DotScan.

[[Ke...]]

I have used 30mm spheres for XXT systems without issue, so long as the probe length is sufficient to not shank. However, I believe the normal Reference Sphere for an XXT system is a 25mm sphere, though an 8mm may be necessary as well based on the length of the probes, as Dane pointed out.

You do not want to utilize a matte sphere for any kind of tactile scanning as the repeated scanning patterns will wear the matte sphere and negatively impact its size and roundness. Here is a Matte Sphere that was being used for Tactile Calibration scans by a customer, heat mapped.

[[To...]]

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I believe Conturas with XXT comes with 30mm Ref Sphere. And, DuraMax machines come with 25mm.

[[An...]]

I calibrate up to 5mm styli on an 8mm reference sphere.
I also think I read in a Zeiss documentation that styli up to 1.5mm should be calibrated on an 8mm reference sphere.
In the meantime, I hardly ever use the 25mm reference sphere.
I have not noticed any significant differences when calibrating the styli on an 8mm or 25mm reference sphere, which is why the 8mm reference sphere remains my main choice.

[[Ün...]]

We have 2 contours. We have Ø30 spheres that come with the devices and a Ø8 reference sphere for Ø0.5 probe calibration.

Unfortunately, one of the technicians dropped the Ø30 reference sphere and it became unusable. Therefore we will take the reference sphere

I had previously read on the forum that including Ø0.5 probes can be calibrated with a Ø25 reference sphere.

However, the ability to calibrate all probes with the Ø8 reference sphere was also new information.

Our probes are generally 40-60 mm long, so if we can calibrate all probes with the Ø8 reference sphere, I can buy a new Ø8 reference sphere.

Thanks for your valuable information

[[Da...]]

I just want to share my experience not so long ago with qualifying I think 0,5mm diameter ruby on 25mm diameter reference sphere. Sigma value was qualified very low 0,0003mm I think, but the diameter was wrong (too big). I saw that difference when 1st lowered sphere coverage and confirmed with 8mm diameter ref. sphere afterwards.