How do you turn a part upside down and maintain yur past alignments? Is there a way to stitch things together or do you have to run 2 separate programs? Can't find anything in the hel file on this.
2: since a large number of the parts I am doing for my current employer are circular parts, this company uses a machine lathe chuck, mounted to the surface plate, with a recalled global alignment done to the tops of an interchangeable pin set. That way, the center of the alignment is ALWAYS at the same exact location, no matter if the part is flipped or not.
We have one of these too, however because we cannot guarantee it is level or the same height once it has been flipped over (we work to very small tolerances), we have to do an alignment again for the Z axis anyway, and so we do the Y and X at the same time too. Our components aren't very heavy, so they can 'float' at different heights in the chuck if not put back exactly the same.
We have one of these too, however because we cannot guarantee it is level or the same height once it has been flipped over (we work to very small tolerances), we have to do an alignment again for the Z axis anyway, and so we do the Y and X at the same time too. Our components aren't very heavy, so they can 'float' at different heights in the chuck if not put back exactly the same.
That would be a difference in our parts... Mine are mostly iron castings weighing in excess of 20lbs. Our tolerances aren't huge, but at 50 microns, the weight is pretty good at keeping us in the same general area.
That would be a difference in our parts... Mine are mostly iron castings weighing in excess of 20lbs. Our tolerances aren't huge, but at 50 microns, the weight is pretty good at keeping us in the same general area.
It depends what your best practices are then. We follow NPL guidelines to the letter when it comes to Metrology, but this could be too extreme for other companies. If you use fixtures and the component is heavy enough to exert downward pressure then I don't see as much of an issue.
When it comes to dimensioning a part with a flip in the program, how do you dimension a height from a plane before the flip and after. I have the part on a vblock sitting on a face that I cant get any hits on until I flip the part. Is there a way to assign a variable and create a generic point? Will that dimension be accurate
Or would it be best to elevate the part to get as many features as I can before flipping the part. I want to create a dimension from a plane before the flip to a plane after the flip. Looking for the most accurate and less time consuming way. There is a plane I cant get to when I set the part up on a vblock. If its better to make a fixture to reach that plane I will take the time to make one.
