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# Chain assembly link Pattern, 3D cam roller pattern and timing belt tooth pattern

## Chain assembly link Pattern, 3D cam roller pattern and timing belt tooth pattern

Idea: Pattern option needed for pattern along curve for equally displacement (not distance / curve length which is currently available)
We need a resolution in Creo Parametric 8.0 for a chain assembly.
We want to assemble a chain in a curve using a curve pattern. But the pitch distance is not equal in the straight line and in the curved path. It is the same along a straight line and varies along curved paths. This is critical assembly and so we should assemble the chain as exactly as they are in real assembly. How to assemble a chain in a curve using a curve pattern without changing the pitch value?

1) There may be a lot of ways to assemble the chain links in a curve. But chain assembly is used universally and so there will be a simple solution to do this (For instance, pattern). So, we want to assemble the chain links using "pattern" along the curve or else a very simple method to do this. Because for a long chain assembly we could not assemble multiple times or go for a lengthy process.
2) There is a way to do this using "pattern". While we search on the internet in all places this method is used. But the problem is the chain links will not assemble in the exact place as the pitch value varies along the curve. But as the assembly is critical we need to assemble the chain exactly in the same place as they will assemble in real life.

Our trial and difficulties:
We have tried to pattern this using eight patterns.First and second are for top straight line pattern two times for inner links and outer links. 3rd and 4th are for curve patterns. 5th to 8th are mirror patterns.
1) If we change the no of links, the pattern will fail and we need more time to correct them and reassemble the links.
2) If we change the no of links, sometimes the link position will change (the same link comes nearby at the pattern ends) so that we have to reassemble the links once again.
3) Creo Parametric does pattern using number id. For instance, if we do a pattern first time, the number will be 1 to 10. For the second pattern, the number will be 11 to 20. We have connected the "no 10" link to the "no 11" link. When we change the number of links for the first pattern as 1 to 5 and for the second pattern as 6 to 10. The pattern will fail and creo will not change the assembly reference from 10 - 11 to 5 - 6. This is the major problem in Creo which should be fixed or we need to know the solution if any one is there. Because this not only affects the chain pattern but also all other patterns like sprocket teeth pattern, gear teeth pattern, toothed belt pattern,etc.
4) If we try to assemble other complex curve shapes (using more idler sprockets) this will be very difficult to assemble.
5) Sometimes if the no of teeth on sprocket changes, the last link on sprocket (curve) will not meet at the straight line end it has to be assembled a little inside from the straight line. This is very difficult to assemble using more steps and more patterns. (My given curve to you is like this). We have achieved this using relations. But if we change the no. of teeth this will also fail. We do not have enough time to program this.
6) Finally, if there is an option to pattern along the curve using equally spaced displacement (not distance along the curve) between points, all this problem can be fixed easily. Using programs it is possible to develop such an option. So, kindly add this pattern option in the curve pattern tools.

We also found an udf chain assembly curve and that also was not properly assembled. They only look like a proper chain assembly.
Also, we need to assemble cam roller on cylindrical groove cam using pattern on curve and also creating tooth on curved belts.
Kindly implement a pattern tool to pattern along a curve with equal displacement.(Not distance along curve which is now available)
13-Aquamarine

This is the Universal requirement. Kindly consider this so that it will be very useful to many of the users worldwide. Because without a timing belt or a chain it is very rare to see machines.

13-Aquamarine

It is taking so long without any reply. Kindly acknowledge the idea and do the implement.

13-Aquamarine

Is there any tool to achieve the mentioned pattern?

13-Aquamarine

PTC is very late in acknowledging the ideas and solving the problem, even though time and production is very critical to customers. Still we are insisting to acknowledge this idea or to solve the case which is we created (Case id: 15956411).

23-Emerald II

I hope for the sake of your career and company you are not waiting on PTC to upgrade the software to finish a project. PTC does a decent job of fixing bugs in the software in a timely basis but they do NOT make product enhancements on a timely basis. If you review the ideas in this website, you will find many really great product enhancement ideas with 100's of votes that have been ignored for many years.

13-Aquamarine

If you review the ideas in this website, you will find many really great product enhancement ideas with 100's of votes that have been ignored for many years.

That's why we are disappointed. Also, today I saw a machine assembly of a big company which uses the same in the 3d curve pattern, if there is a solution means why PTC is not solving the case till now are not providing the solution.

Community Manager

Thanks for using the Community.  I wanted to let you know that I have reached out to our internal teams to ensure that they are aware of your feedback.

Regards

Leigh

13-Aquamarine

Hi @Leigh

Thank you for your reply. Kindly solve the case (Case id: 15956411) as we saw the machine Creo website designed with Creo has that solution or else acknowledge our idea and create a pattern tool as there may not be a machine in the world without chain assembly or timing belt or a cam. This problem is addressed by someone a seven years ago. But still there is no any resolution.

13-Aquamarine

Any solution?

19-Tanzanite

Having the option to use cord length when patterning on a curve would be very useful for chain type assemblies.  This would allow for a much closer approximation of reality using pattern rather than creating the the cords in a sketch and individually assembling the links.

13-Aquamarine

Yes. It will be very useful if PTC gives a solution for this.

15-Moonstone

For above, we have to do the dimension pattern using point with proper pitch and then assemble the chain link and then use reference pattern.

But this is also the long process and if other competitor has best solution like chain pattern as a separate command.

do we have this in our road map.