5 ms·
They know the capabilities of the machine that will produce the part. It is a misunderstanding of the process to think that slapping geometric tolerances on a
by asmithmd1 17y ago
They know the capabilities of the machine that will produce the part.
It is a misunderstanding of the process to think that slapping geometric tolerances on a drawing will change the part. If the process specified produces the desired part within tolerance then there is no need to specify it further. If the process can not produce the part reliably then adding tolerances to a drawing is not going to help. They do mention the one functional specification they need -a press fit into a bearing
- kqr2 17y agoAlthough they do a press-fit test, what about the outside dimensions? What about material quality? The purpose of geometric tolerancing a design is so that when you assemble all the pieces together with varying tolerances, you have a good chance that it will all fit together. I've worked with machines with stepper motors in the past and they can get out of alignment. Don't get me wrong. I think the whole maker movement is really cool. I'm just saying that manufacturing a quality product is not easy. I'm even thinking about buying one, however, if I bought a kit and the pieces didn't fit together very well, that would be frustrating.