I was running a part that has had a old program on it on a global s 9.15.9 chrome. I found it oot. I was told that part has to be ran on the 7.10.7 global advantage. So I did and found it to be good. Same part same program same head and porbes. Why would this part run good on 1 machine and not on the other? I can run other parts to within a couple tenths of each other on both machines but not this one.
Big .020 to .090. It looks like the alignment shifted down on the cad. Part frame is off from the cad even after running the part. It's enough it misses features. It's like it has flipped. Vectors. It also looks like the probe is 180 degrees from machine to machine. Hexagon is on top a90b90 on 1 machine and on the bottom on the other.
I am told from other who worked here a long time this happens all the time depending on the part. Its no wonder why management has no faith in the cmms. The guy I replaced just told they thays how cmms and pcdims are. He would then take a few easy feature call them what the drawing said and ship the pars. Management turns a blind eye as money comes in. Now we have new customers and as9102 and they want cmm data and I can not give it with his programs.
Yeessh! That sure sounds like a significant difference. That is a head scratcher. It will probably turn out to be something really simple, like the first or second alignment missing a level or rotate command or something. The sort of thing that may work with one machine/fixture, but not with another.
I'm sorry that you're coming into that sort of work culture. Sounds like you have an uphill battle ahead of you. Good for you for trying to find solutions rather than just shrugging and following the old dumb procedures.
Me personally, I would start going through the program with everything at CAD nominals and then start looking at the alignments in the program, if your alignments are solid your program isn't going to repeat well. I've been burnt n learnt on that. If you have to run the final alignments twice to make sure that you are good then it needs to be done.
We run 17 CMMs from new Global CMMs to old PFx's and if the programs are all touch even though we use LSPX1H_T sensors on the Global CMMs we are often seeing less than 0.005-0.010mm difference in reports providing the probes were qualified recently.
sounds like the methods of measure aren't controlled between machines. Get your methods of measure under control. have one routine to measure product on multiple systems.
I think
Cris_C nailed it with comment about improper alignment level, or missing rotation. Those were common occurrences in my fixing issues. Additionally, programs (by previous guy) would start measuring from machine coordinates, so there was no initial part alignment. That doesn't quite seem to be your issue necessarily. I would double check alignments and ensure each is "complete" individually-not merely an update of a RECALLed alignment.
Hosed alignment with missing features. The Demon don't care. It will keep chugging along with whatever latent data it can find anywhere in the buffer.
Throw a report print command at the end of a few programs and let the fun with programming begin.
I think Cris_C nailed it with comment about improper alignment level, or missing rotation. Those were common occurrences in my fixing issues. Additionally, programs (by previous guy) would start measuring from machine coordinates, so there was no initial part alignment. That doesn't quite seem to be your issue necessarily. I would double check alignments and ensure each is "complete" individually-not merely an update of a RECALLed alignment.
One of the things that I have learned (from someone here or the other forum) is to recall the machine coordinate system (STARTUP) when building the 6 DOF alignment. IMO it cleans the garbage out of the alignment process
One of the things that I have learned (from someone here or the other forum) is to recall the machine coordinate system (STARTUP) when building the 6 DOF alignment. IMO it cleans the garbage out of the alignment process
Very astute Mr. Wade, that's been on my mind lately.
What is Six DoF? Is that's what's going on in the Ukraine?
it also breaks the chain of recalls and speeds up execution time, as the demon isn't looking at all your previous alignments whilst trying to figure out how to make the new one.
