topic Re: Trying to duplicate threads in Inventor Forum

Trying to duplicate threads

matthew_neesley — Tue, 16 Mar 2021 16:44:56 GMT

Hello to all:

I have an existing model with threads. I am trying to re-create the threads in a new project, and INV won't duplicate them correctly. I have attached the original model file (cylindrical part), there is a block off to the side with the same diam. hole, with a thread feature that matches the specs of the original. Could someone look this over quick and tell me why the threads won't duplicate correctly? Thanks in advance!

Re: Trying to duplicate threads

mcgyvr — Tue, 16 Mar 2021 17:54:14 GMT

@matthew_neesley What specifically isn't working for you?

Did you just not define the "Behavior" section to set the thread depth?

Or are you talking about the perceived pitch difference in the applied cosmetic image applied to each hole?

Re: Trying to duplicate threads

johnsonshiue — Tue, 16 Mar 2021 19:55:37 GMT

Hi! This is an interesting issue. It does seem that the thread graphics looks different on the older thread than the newer one of the same spec.

The interesting thing is that if I export the part as STEP and import it back to 2017, the cosmetic thread there looks the same as the newer one in 2021. The only two possibilities are 1) the 2017 thread was created based on a different thread table than the one shipped with 2017, or 2) there was a bug in 2017 that showed the finer thread image somehow.

Many thanks!