How best to ask for CMM data ?
How best to ask for CMM data ?
(OP)
We have an expensive large bearing set manufactured and CMM'd by our sub-contractor.
The Data he is sending us is largely rubbish - consisting of 2 unreferenced columns of txt data -( X,Y) and an un-datumed DXF file with offset profiles and no other information.
What can i reasonably ask him to supply that is useful?
We have solidworks cad.
Thanks
The Data he is sending us is largely rubbish - consisting of 2 unreferenced columns of txt data -( X,Y) and an un-datumed DXF file with offset profiles and no other information.
What can i reasonably ask him to supply that is useful?
We have solidworks cad.
Thanks





RE: How best to ask for CMM data ?
I would request a proper drawing of the part being measured, showing the coordinate system the CMM operated in, with respect to the part. You must know where the origin is, what plane it is on and what datums were used, so that the coordinate system can be defined in the SW model, before the CMM measurement points are imported into that model.
The dxf file should have more information than (X,Y), the CAD system will need a (Z) value. What does 'offset profiles' mean, is it any thing do with the probe spherical radius ?
If the CMM was driven by a program to goto pre-determined points then the two files can be compared to each other to give a file of differences, which can be further analized.
The sub-contractor should supply enough information so that there can be no doubt, and no assumptions have to be made.
RE: How best to ask for CMM data ?
There are hundreds of companies that do this. And frankly they should know what info to give you. Give them a shot to redeem and if they still are not helpful, ship themout and get somebody else.
Good Luck!
Quote: "Its not what you know, its who you know"
Everythings a learning experience-Everything
RE: How best to ask for CMM data ?
RE: How best to ask for CMM data ?
RE: How best to ask for CMM data ?
RE: How best to ask for CMM data ?