Mechanical centering is quite primitive. I'm looking into OpenCV for the image recognition. I have to be able to place 0603's and SSOP's.
I do have pressure sensors already but not using it yet in code to detect issues. For feeders though, I'm only building some grooved tracks to guide the tapes, but the head mechanism will have another arm (a spike of sorts) that will feed the tape before taking a part from it. Yes, slower, but so much simpler. Cheers, -Neil. Quoting Jon Elson <[email protected]>: > Yup, some capacitors vary in thickness from one part to the next in the > tape. > > I have a 12 year-old or so Philips CSM84, with no nozzle changer, no > vision, no Z axis. > But, it has 3 heads and chuck centering jaws on the heads, plus a large > component > centering station. It uses a single-pixel camera for picking up > fiducials from the board > (moves heads in XY while watching the sensor for dark or reflection). > It has a human-only > camera for locating the pick-up location of parts on the vibratory > feeder. It has vacuum > sensors on each nozzle and will perform a bunch of different cycles to > continue running when > something goes wrong. So, if a part gets stuck to the nozzle, it will > pop up and down and blow > to try to get it to drop off in the dump bucket. If it doesn't get the > right vacuum when picking up > or just before placing it will dump the part in the bucket, but if the > vacuum goes back to normal > after using the centering jaws, it will place the part. (Sometimes the > part is not picked up well > from the tape, but the centering jaws restore it to the proper position.) > > It does real well with 0805 and SOIC parts, but is pushing the > capabilities for SSOP > and fine-pitch chips. > > I was lucky to get about 60 feeders with it, and they are quite > complex. Each feeder certainly > has over 50 parts in it. All the small feeders are actuated by the same > air cylinder that makes the head > go up and down. The larger feeders (16 mm tape and up) are operated by > an air cylinder in the > feeder that is controlled by a valve tripped by the head air cylinder. > > Jon > > ------------------------------------------------------------------------------ > Get a FREE DOWNLOAD! and learn more about uberSVN rich system, > user administration capabilities and model configuration. Take > the hassle out of deploying and managing Subversion and the > tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
