ndzied1
Lifetime Supporting Member
I'm trying to set up a machine with an OMRON F-10 Pattern matching sensor and having a bit of a problem interpreting the interpreted, so called, instructions which came with it.
I'm trying to detect the presence / absence of a groove in a part. The sensor has the capability of doing a plain (contrast averaging) measurement or a pattern measurement. I'm pretty sure I want pattern matching.
Also, using some downloadable, free, (you get what you pay for) software you have the ability to futz with the detection area and pattern area and something called a registered area but the whole thing is a little fuzzy and the area's seem to change at will. I really need to get a good grasp on this to mask out some bright spots in the camera's field of view.
Also a note, we have pretty much determined that it will be better to teach the system on the absence of the groove as that image is more stable than the one with the groove (i.e. the groove width varies slightly). When the groove is absent, there is still a chamfer in the view which displays as a bright horizontal line in the field of view. This is the pattern I want to remember.
I know there are probably other ways to do this but this is the system I have now and really can't change it.
I have it close but I still get false readings maybe 1 in 250 parts which is way unacceptable on a 2 shift a day machine w/ a 19 sec cycle time. So far I have only rejected good parts but I'm sure if I don't have a good handle on what this thing is doing it's only a matter of time before I pass a bad part. This is the last inspection machine before these parts get shipped to a big-4 auto mfg. and you know what happens if they find 1 bad part
Any insight into setting this thing up would be greatly appreciated.
I'm trying to detect the presence / absence of a groove in a part. The sensor has the capability of doing a plain (contrast averaging) measurement or a pattern measurement. I'm pretty sure I want pattern matching.
Also, using some downloadable, free, (you get what you pay for) software you have the ability to futz with the detection area and pattern area and something called a registered area but the whole thing is a little fuzzy and the area's seem to change at will. I really need to get a good grasp on this to mask out some bright spots in the camera's field of view.
Also a note, we have pretty much determined that it will be better to teach the system on the absence of the groove as that image is more stable than the one with the groove (i.e. the groove width varies slightly). When the groove is absent, there is still a chamfer in the view which displays as a bright horizontal line in the field of view. This is the pattern I want to remember.
I know there are probably other ways to do this but this is the system I have now and really can't change it.
I have it close but I still get false readings maybe 1 in 250 parts which is way unacceptable on a 2 shift a day machine w/ a 19 sec cycle time. So far I have only rejected good parts but I'm sure if I don't have a good handle on what this thing is doing it's only a matter of time before I pass a bad part. This is the last inspection machine before these parts get shipped to a big-4 auto mfg. and you know what happens if they find 1 bad part
Any insight into setting this thing up would be greatly appreciated.