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L
ldrutel1-Visitor
1-Visitor
November 2, 2017
Question

CREO3-M130 PATTERNS BY REFERENCE

  • November 2, 2017
  • 2 replies
  • 3755 views

Hello all users

I use CREO3 M130 and i have some problems with the patterns functions.

In this sample i have do different holes by patterns (dimension, axis, points and direction). In the assy a would use the pattern function by reference only.

1) Firts, for th part 2 (Washer) is it possible only for the pattern 1 and 3 not for the 2 and 4 Why ?

2) Second, i would like assembly the part 3 (Screw) on the washer and use the pattern by reference too. And in all the situations, not working.CREO3-M130 - PATTERNS.jpg

2 replies

P
PCV_co.6-Contributor
6-Contributor
November 2, 2017

Change constraints for washers and screws from axis-axis to cylinder-cylinder. In this way all patterns works.

L
ldrutel1-VisitorAuthor
1-Visitor
November 2, 2017

Great , his solution resolve the first point. Now i can pattern the all the washers by reference.

But, for the screw, i have change also the assy axis/axis by Cylinder screw/Cylinder washer and the pattern reference not work. It work if i assy the screw : Cylinder screw/Cylinder part1 and gap Surface screw/Surface part1 but this solution is not really the best.

P
PCV_co.6-Contributor
6-Contributor
November 2, 2017

I just changed constrains for screws from (screw axis)/(washer axis) to (screw cyl)/(washer cyl)Capture.PNG

T
TomD.inPDX17-Peridot
17-Peridot
November 5, 2017

I use an old version of Creo 2.0 (M040) on a regular basis.

I find that the reference patterns are particularly problematic at both part and assembly levels.

Some I've reported and have received SPR's.

 

I also use Creo 3.0 and it also has similar issues with reference patterns.

In general, I avoid reference patterns unless they are straight forward.

 

At the assembly level, I use the following technique:

Hardware sets are related to each other where only one of the "set" (washer, lockwasher, nut for instance) is bound to the assembly.  In this case, it would likely be the 1st component in the stack, the washer.

 

Creo is not Solidworks (not that you are implying so...).  Solidworks is forgiving for some of this kind of logic where Creo is painfully adherent to strict constraint rules.  However, Creo is also a lot more powerful in selecting references and managing these assembly constraints.  This tight adherence really shines in Pro|Programming functions for configurable development efforts.  If using a reference pattern reliably is important to me, I will manage it with relations instead.

 

 

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