Need help on Tolerance stackup
Need help on Tolerance stackup
(OP)
Hi,
Please find the attachment of the aprt. I am really struggling to perform stackup on this. Please help
Please find the attachment of the aprt. I am really struggling to perform stackup on this. Please help
Regards,
Paul





RE: Need help on Tolerance stackup
RE: Need help on Tolerance stackup
What are you trying to figure out? I think you are missing info too.
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JHG
RE: Need help on Tolerance stackup
I am trying to figure out the gap between the end of (1) and the portion of (6) which is outside, and it would finally help me to get the overall length (OAL) (which is what I am calculating by worstcase and later RSS). The problem I am actually facing here is, the dimensions 2.18 and 2.58 overlaps, I really did not come across this situation until now. What approach should I have to stackup incase of overlaping dimensions. Please find the attachment for the gap for your convenience. Thanks.
Regards,
Paul
RE: Need help on Tolerance stackup
RE: Need help on Tolerance stackup
Once that is done, you would start at the right side of component 1 and draw a path of vectors which eventually lead to the right side of component 6. This is the most important part of a stack -- chaining these vectors together, and this path has to go through the contact points where the various parts touch.
Based upon that you can then add up the appropriate numbers. But again, don't try to do the math until you first create the stack path. And that's just for one extreme; to find the other extreme (max or min) you would jiggle the parts again and probably get a totally different stack path.
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Need help on Tolerance stackup
These will be affected by the allowed assembly loads and their variation and the amount of friction at the interfaces.
RE: Need help on Tolerance stackup
The stackup is to be done at an initial stage i.e there would be no movement (of the plunger rod) at all. And there is no load as well. What I want is to create a stack path and calculate thereafter, but the problem is 2.18 and 2.58 is overlapping. So in this case how do I approach for creating the path or loop or chain as you say.
Please find the attachment as an example but without having any overlaps. Thanks
Regards,
Paul
RE: Need help on Tolerance stackup
RE: Need help on Tolerance stackup
Thanks for the confirmation, could you please tell me if there is any other way out?
Regards,
Paul
RE: Need help on Tolerance stackup