hexagon logo
Register Sign in
  • Replies 15 replies
  • Subscribers 224 subscribers
  • Views 148 views
  • Users 0 members are here
Options
Related

problem with fixture plate

pcdmisstudent
Hello everybody

So we have this fixture plate on our cmm with some pins on it.
and all parts we measure are put in a fixture and slided against the pins, so no manual alignment requierment.

problem is that every year when hex comes to calibrate our CMM, he has to take off the fixtureplate
and when he puts it on again, the plate is in a slight different position.

This kinda screws up for alot of our parts because we have to run the manual alignment again.

Has anyone any idea for either
1. A good setup for the plate so its precicily in the same position everytime we remove it and put i back. (Currenctly we put it with 3 bolts in the graphite plate)

or
2. Work with a zero point system so that we align on our fixture plate and all other manual alignments are based on that. so if we remove /put back our fixture plate all we have to do is do a 3/2/1 alignment on fixtureplate. (instead of running manual alignment on every part)

ty guys!
Parents
  • I highly recommend the external alignment method neil.challinor outlined. It has the additional advantage that if you ever get a second CMM, you can put a second identical fixture plate on it, define the same external alignment, and put the same tips and angles on it all your routines done this way will automagically run on both machines without any additional effort. It blew my mind the first time I got it to work on our setup.

    One thing I do differently from what he said is that I still start with a manual alignment after I recall my fixture alignment. Programming that offline finds the necessary offset from the fixture alignment. And if the fixturing ever changes somehow, you can just mark and run the manual alignment and you'll be good to go. You should be able to use this to convert your existing programs - put the recall command above your existing manual alignment, then run it through including the manual alignment. The CAD may end up in a goofy spot, but your program will be properly using the fixture alignment.

    Regarding offline programming, I just copied one of the .aln files to my offline workstation. I haven't had any issues with that.
Reply
  • I highly recommend the external alignment method neil.challinor outlined. It has the additional advantage that if you ever get a second CMM, you can put a second identical fixture plate on it, define the same external alignment, and put the same tips and angles on it all your routines done this way will automagically run on both machines without any additional effort. It blew my mind the first time I got it to work on our setup.

    One thing I do differently from what he said is that I still start with a manual alignment after I recall my fixture alignment. Programming that offline finds the necessary offset from the fixture alignment. And if the fixturing ever changes somehow, you can just mark and run the manual alignment and you'll be good to go. You should be able to use this to convert your existing programs - put the recall command above your existing manual alignment, then run it through including the manual alignment. The CAD may end up in a goofy spot, but your program will be properly using the fixture alignment.

    Regarding offline programming, I just copied one of the .aln files to my offline workstation. I haven't had any issues with that.
Children
No Data
© 2024 Hexagon AB and/or its subsidiaries. Privacy Policy | Cloud Services Agreement