ALIGNMENT WITH A PRIMARY DATUM SURFACE (FREEFORM)

[[Fr...]]

GOOD DAY ALL, IM USING CALYPSO 7.6, (2022) 

THE PART IM WORKING IT IS A CARBON FIBER ONE. DATUM "A" IS A CURVE SURFACE. DATUM "B" AND "C" ARE 2 PILOTS HOLE .098" DIA

I CAN CREATE FOR SURE THE FREEFORM SURFACE ON THE CAD AS WELL AS MY DATUM B AND C

WHEN I WANT TO ALIGN MY PART IN THE CMM THE SOFTWARE JUST DOESNT LET ME CHOOSE MY DATUM "A".

SO NOW IM BLOCKED WITH THAT, CAN SOMEONE HELP ME.. :S

I LEAVED THE DRAWING IN  THE ATTACHEMENT..  NOTE: IN ANOTHER METROLOGY SOFTWARE I HAVE NO TROUBLE TO ALIGN THE PART..

*** IM A NEW USER WITH CALYPSO 🙂

[[DW...]]

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  It's not letting you choose A because it is a free form surface. Are you familiar with a Reference Point System (RPS) alignment? Might be what you need to do here.

[[Cl...]]

Someone may correct me, but I think the 3d Best-Fit method alignment would be appropriate here. There is a detailed on-line video on how to perform this.

[[Ma...]]

I have no idea how that part looks like and what options are, but if you can place that part on table to be able to measure datum A, then i would perform simple alignment ( table as plane, 2d line to lock rotation and simple point to have origin and then perform RPS or detailed scan of that datum A to perform FF bestfit.

[[Ri...]]

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This is what I have used in the past when I was doing medical parts.

I had a family of Cervical Plates; there was no single flat or straight surface on these.

This link has some information, in particular how the alignment is created.

Maybe this will be helpful.

 

[[De...]]

I would use 3d best fit alignment and loop it a few times. Its what I used on knee replacements.