Creating qualification for 2 reference spheres on same stand?

[[Lu...]]

Hello, for reference i have never created a new probe or a new qualification program or anything. I have done research but I am having a hard time finding info on a couple different things.

Currently we use a 30mm reference sphere at a 45 degree angle for every probe we have, even our small probes. this has caused some major inaccuracy in some of our smaller probes and I am getting it set up to where I would like to have the 30mm sphere standing straight up, and a 8mm ball at the 45 degree angle (unless there is a better setup that you all recommend). 

I believe I know how to edit our current reference sphere to stand straight up, and i believe i can figure out how to add another reference sphere at a 45 degree angle. what i want to know is do i need to put in somewhere that they are both there at the same time, to where when it does the qualification of some probes it doesn't crash into the other sphere? I'm going to be creating a new qualification program that would hopefully qualify all the probes at the same time, though if necessary i will have 2 separate qualification programs for out smaller and bigger probes. 

Is there anything else to consider when modifying the qualification spheres? I have never had any official training on CMMs and though I have found work instructions that help I havent yet seen something about this. Thanks!

[[Ma...]]

I think there is no problem with having two ref. spheres on same stand. Calypso is asking only for it's center.

If you are removing that stand with spheres, then you have to first tell it's new position of both spheres before running a program.

If i remember correctly, then in program you have finding center of ref. sphere ( i am not sure if you can select which ref. sphere is selected ), but in program you have two spheres with correct diameter, which will later be used for calibration.

[[Lu...]]

Please sign in to view this quote.

So Calypso wouldn't crash into the other sphere during qualification even without telling it to path around another sphere?

[[Ma...]]

That's not what i said - you would describe closely how they would be used, positions and so on.

We are using star probe systems, so we have one ref. sphere at 45 angle and rotate it by 180° to cover all 5 probe tips.

Calypso won't alter movements just because there can be next sphere, but if you correctly set calibration, then you can avoid collisions.

[[Je...]]

Please sign in to view this quote.

Hi

Please sign in to view this username.

.  Thanks for posting about this.  Very interesting.

We use a measurement plan to qualify all stylii, and this utilizes both 30mm and 8mm spheres.  These two spheres, however, are mounted on different posts.

Important:  Calypso does not automatically adjust the navigation paths of a stylus qualified on one reference sphere based on the location of another sphere.  Collisions are possible without proper planning.

If it's necessary to fixture both your reference spheres on the same post, you'll need to plan for clearance.  I'm sure this can be plotted and mathed, but you can also just observe a qualification in CNC on slow speed to get an understanding of required clearance.

Edited yesterday at 08:50 PM

[[Ri...]]

I have worked on systems with 4 master spheres.

Two were at the far -X and two were at the far +X.

At the far -X:

One sphere was 45 +X+Y and 45 +Z

The other sphere was 45 +X-Y and 45 -Z, just the opposite for the far +X.

You would have to qualify each master sphere giving each sphere a number.

Then when qualifying individual styli, you program what stylus used which master sphere by the master sphere number.

This was on a system using VAST XT Gold from single -Z styli to multi star and custom probes with up to 6 tips. I see no reason why this wouldn't work with VAST XTR Gold and RDS XXT.

With the RDS XXT, you would have to use Lists, I do not believe the CAA would be able to work on the configuration I described.

 

Edited 9 hours ago

[[Lu...]]

Please sign in to view this quote.

Yes that is probably what I will end up doing, i believe i have it figured out to where all my probes "should" qualify without crashing into the other sphere but i can only wait and get it done whenever out 8mm sphere comes in (which i absolutely will be running slowly and monitor). Thank you very much

 

Please sign in to view this quote.

This is something I haven't really considered yet, could i write my qualification program to check the location of both spheres at the beginning of the program automatically? Or would that need to be done before by using the "reference sphere position" in the probe management menu first. I saw on a work instruction I found that you can put a "qualification" characteristic for the master probe and it will check the reference sphere position, but to only do this if you can put the reference sphere stand in the same spot/rotation which I can do. If not its no big deal its just something I'm curious about, thank you all for your help!

[[Lu...]]

I have another question, I believe i don't understand the "Sphere coverage" and "Taper angle" for the probes when qualifying against the reference sphere. Based on my understanding, a "180" sphere coverage would mean the probe covers half of the reference sphere right? Yet i have a probe that physically could not reach below my current reference sphere (its a probe facing to the left, pretty small ruby and the shaft is facing upward really close to the ruby.) yet the sphere coverage for that probe is also set to 180. Am i not understanding "Sphere coverage" and "Taper angle" correctly? I can take photos if it would help you all to understand

[[Ma...]]

Sphere coverage would be for scanning ref. sphere - but tensor is ignoring that number and is doing 180° anyways.

I am not sure about taper angle - once i am doing aquisition of ref. sphere, then i am setting up some angles.

[[Ri...]]

Short video of my Master Sphere setup.

1 thru 5 are all 30mm Master Spheres, 6 is an 8mm Master Sphere.

Each one you create can be assigned an orientation (Inclination Angle, Rotation Angle), as seen in the short video.

From this, if I have Master Spheres 1 thru 4 setup on the CMM and a Star probe with 4 tips (-X, +X, -Y, +Y) I can assign each stylus tip to a specific Master Probe by its Number assignment. 

When you run an Automatic Qualification, the built-in routine will run each stylus tip to its respectively assigned Master Sphere when you manually qualified each tip.

Clearance Distance is established for each individual Master Sphere in the "Clearance Distance dialog". In my case, the Clearance Distance is the same for all Master Spheres.

Edited 6 hours ago

[[Je...]]

Please sign in to view this username.

, make more videos about Calypso programming.  Youtube or other platform perhaps?

[[Ri...]]

I haven't thought about posting any. I have deleted more than I can recall from other forums.