Two/Multiple Reference Spheres in 1 Cal Routine

[[Jo...]]

Hello all,

I am looking for some help/considerations when creating a qualification program designed for two reference spheres.

 

For some background, I have added a second threaded hole to hold another reference sphere pointing in the Y- to be able to qualify a specific probe. (See attached Image)

I want to add that specific probe to the current probe qualification routine.

Is it as simple as adding a second master probe qualification using Ref Sphere 2?

 

For example,

Characteristic List:

1. MasterProbe qualification Using Ref Sphere 1

2. Probe 1, 2, & 3 qualification using Ref Sphere 1

3. MasterProbe qualification Using Ref Sphere 2

4. Probe 4 qualification using Ref Sphere 2

5. Applicable Stdev characteristics for all qualified probes

6. End routine

 

Is this method the correct way, or are there other considerations? Unfortunately, I do not get much actual CMM time to test this. The last time I tried this, the reference sphere 1 location calibrated the reference sphere 2 location as this was the last "Ref Sphere Loc" performed. This gave an error during the production probe qualification routine. 

 

TIA

 

[[Mi...]]

Yes that works.

 

We handle the situation by physically moving 1 ball instead of having 2. Same difference really.

[[Jo...]]

Hey

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thanks for the feedback. 

Do you perform a "ref. Sphere Position" between the Ref Sphere relocation?

Or is this within the same qualification routine and the spheres are always in the same location/orientation?

[[Mi...]]

Anytime you even think the Ref. Sphere has moved you must redo "Ref. Sphere Position"

 

So we:

Ref. Sphere position ( Using RSH Sphere definition if it's that type of sphere)

Calibrate all probes for that position

Move Sphere ( Change tilt and/or Rotation)

Ref. Sphere position again

Calibrate all probes for that position.

 

[[Jo...]]

So in your case, because you are using the same reference sphere in two different locations; you are redoing the Ref Sphere position. 

But in my case, I want to be able to "ref sphere position" for both reference spheres and for it to remember their respective location/orientation. Is this even possible, or is the software not designed to do this?

[[Mi...]]

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I'm sure it's fine to do both at the start. The locations are saved.

 

Just always make sure the right Sphere is selected. I picture the wrong one being done.

[[Jo...]]

Yeah, that's always my thought. I want to make it as idiot-proof as possible. That was my idea behind attaching a new ref sphere to the existing RSH. 

I will have to get some time to do some more testing. 

[[Cl...]]

Contura G2 VAST Gold XT. I use two ref spheres (30mm & 8mm), both attached to the same base. The base is mounted on a round keyed pallet. This pallet gets inserted into a schunk pneumatic chuck. The chuck is permanently located in the center of the CMM on a R&R Fixture grid plate. All styli systems are qualitied with no problems.

[[Jo...]]

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Hey Clarke,

Are you calibrating these within the same stylus system qualification program or are these calibrated manually?

Edited March 11

[[Cl...]]

The same program.

Here's the ref sphere I use. It is mounted on an aluminum plate that is keyed to fit into a Schunk pneumatic pallet. The pallet is bolted to a R&R fixture grid plate. All of our fixturing is part specific/Poke Yoke and are mounted on the round aluminum plates. We simply remove and replace them as we run them. Giddy up!

Edited March 12

[[Cl...]]

[[Ri...]]

There should be an older topic on this.

I have used up to 4 Ref Spheres. We used two of these, one at -X and one at +X.

Double Reference sphere holder, Invar, 400mm, M8/M12 base (reference sphere not included) - Reference Sphere Holders (RSH)

 

Someone else posted they used about 8, I think there were pictures too.

[[Jo...]]

Hello All,

I'm a new Zeiss/Calypso user, trying to adapt my brain from PC-DMIS. I created a program with 3 Probe System Qualification characteristics. The first 2 use sphere 1 (30mm), the 3rd uses sphere 2 (8mm). It runs through the first 2 as expected. Then it gets the third stylus system from the rack, articulates into the required position, and then goes straight up in Z until I stop it. Does anyone have an idea why this would happen? The sphere is located. If I run a manual qualification with the stylus system from Probe system qualification #3 it runs through without a problem.

I'm using Calypso 2023 on an Accura machine with a VAST RDS-XXT sensor. Would the sensor possibly have anything to do with why this would happen. From what I can see, those who have posted that they run qualification programs with multiple spheres are using XT sensors. Has anyone run a multi-sphere qualification program with an RDS-XXT?