How to construct this DRF according to ISO ?

[[Gu...]]

Hello all,

 

I have a part with 3 holes. First one is an axis (datum A), second is an axis (datum B) and the third is located by A and B (see below).

 

 

My question is : how to construct the DRF A¦B according to ISO standard ?

I made a 3d-line (datum A) for the primary rotation and X origin and Y origin.

But I made a CIRCLE on datum B for the secondary rotation (can't use a 3d-line since it's same direction than datum A).

 

How would you construct that in calypso ?

 

Thanks 🙂

Guillaume

[[Cl...]]

Are there basic dimensions from hole to hole that you left off?

Edited August 25

[[Ch...]]

try the new 'parallel cylinder' option ? , I think that is for 2 cylinders that form one datum (mainly in ISO).

Alternatively, you could use -A- as primary and secondary, and -B- for rotation or tertiary only.

[[Ma...]]

I've not tried parallel cylinder so i can not speak for that, but using cylinder A as datum A, then there can be a problem while cylinder B won't be parallel to cylinder A.
You can use circle at middle of cylinder B. This you can set rotation at any number ( if Y origin of B is not same as datum A ).

But this sketch is not a good one - at least try to mimic real drawing.

[[Gu...]]

Thanks for your repsonses

 

Please sign in to view this quote.

Clarke :  no, only the two center distances. I'm not sure we can write it like that.

 

 

Please sign in to view this quote.

Chris :  I'm working on calypso 2016 so I'm not sure that I have this option. It's good to know there is a way to do it on the latest version 🙂

 

 

Please sign in to view this quote.

Martin : Yes I can't use cylinder for datum B, so I used a circle in the middle of the cylinder. The sketch match my drawing (miss only the TP of B ¦A). I agree with you that this is not really conventional.

 

 

I will search for the parallel cylinder on the new version of calypso (I hope we will get it soon !!).

Have a good day 🙂

 

Guillaume

[[na...]]

Please sign in to view this quote.

Since you are on Calypso 2016, recall cylinder into a circle, or make multiple path in circle -> https://qualityforum.zeiss.com/topic/13954-parallel-cylinders-for-secondary-amp-tertiary-datums/?do=findComment&comment=72360 for datum feature B.

Parallel cylinder isn't the right choice here, because you have datum system |A|B| and not |A-B|.

Edited August 26

[[Ch...]]

yes I would not use a cylinder for a tertiary datum in this case, perhaps reduce to a circle only or a point at an intersection of cylinder and face etc.