Welcome to the Onshape forum! Ask questions and join in the discussions about everything Onshape.
First time visiting? Here are some places to start:- Looking for a certain topic? Check out the categories filter or use Search (upper right).
- Need support? Ask a question to our Community Support category.
- Please submit support tickets for bugs but you can request improvements in the Product Feedback category.
- Be respectful, on topic and if you see a problem, Flag it.
If you would like to contact our Community Manager personally, feel free to send a private message or an email.
Options
Having trouble with Tangent Mate, sometimes it works after a reload, sometimes it doesn't
cogzoid
Member Posts: 5 ✭
I'm working on a gear driven linkage for creating a shaking movement. The Tangent Mate in this Assembly seems to be kind of iffy. Sometimes it works fine when I Animate one of the Revolute Mates, and other times I get an error or even worse, a bunch of broken Mates throughout the assembly. Sometimes I can fix it by just reloading the entire document.
https://cad.onshape.com/documents/7b82701561c9f49cc40b0415/w/a20194eeec1f01accfc9ba5f/e/a5ebf6b451e1fcf918cac497
Is there a better way to do these Mates so that they're more stable? I might also be doing the Tangent Mate wrong? I extended the slot .004 longer than the travel of the crank pin and that seemed to help stability, but not entirely. Any advice is welcome.
https://cad.onshape.com/documents/7b82701561c9f49cc40b0415/w/a20194eeec1f01accfc9ba5f/e/a5ebf6b451e1fcf918cac497
Is there a better way to do these Mates so that they're more stable? I might also be doing the Tangent Mate wrong? I extended the slot .004 longer than the travel of the crank pin and that seemed to help stability, but not entirely. Any advice is welcome.
Tagged:
0
Best Answer
-
Options
john_mcclary
Member, Developers Posts: 3,898 PRO
you can set a stroke limit to the pin - slot mate5
Answers
You are correct that extending the slot so you never bottom out is one solution.
You basically trying to keep in the "red" part of the curve.. just before it snaps from positive value to a negative value. Which flips the mate alignment, which causes the error.
Edit:
On second thought, try a pin/slot mate. You may need to add an additional part to act as an axis, seeings how the pin rotates while traveling the slot.
It may actually be that compound rotation of the slot itself and the pin within it that is causing the jump from positive to negative..
Part of this is just academic. I'm able to design the assembly just fine, but I'm trying to learn more about Onshape and I'm surprised that this is a limitation. Surely I'm not the only guy using a crank pin in a slot...