Electronics Forum | Thu Apr 01 22:03:27 EST 2004 | Ken
Are you sure it was measuring a fid? Is it possible it was measuring a block-skip mark?
Electronics Forum | Fri Apr 02 16:31:18 EST 2004 | black5629
Why not use tooling pins (locating pins)? Sounds like the same accuracy...
Electronics Forum | Thu Apr 01 14:11:38 EST 2004 | cedams
Many years ago I remember the Philips CSM series SMT machines used a small tubular laser system for identifying fiducials on the PCB. Can anyone suggest suppliers for these devices. Thanks.
Electronics Forum | Sat Apr 03 16:39:15 EST 2004 | stefwitt
We had a similar system on the Siemens machines, quite some time ago. However, it was not a laser light but a LED and a fiber cable. Actually the center fiber or receiver was surrounded by a bundle of small fibers for the LED light source. You may al
Electronics Forum | Fri Apr 02 16:45:29 EST 2004 | cedams
Ken, You'd think so but the tooling pins only register to the drilling process for the PCB. The fiducial registers to the copper pattern and for both glueing and placing SMT components the pads are more important than the holes. That's why the machi
Electronics Forum | Sat Apr 03 19:58:53 EST 2004 | Ken
I have used tooling holes and fiucial registration since the late '80's. In fact if your maximum "vision" tolerance is +/- 0.05mm, your in the same ball-park as locating pins. It is true that fiducial registration is more accurate. However, I woul
Electronics Forum | Fri Apr 02 09:50:40 EST 2004 | cedams
Yup. It was definitely checking the fiducials as well as the block skip marks and it used to work pretty well. What it did was started at the center of where the fiducial should be and scanned left. When it found a change in contrast it scanned righ
Electronics Forum | Mon Apr 12 09:39:38 EDT 2004 | cedams
Ken, Thanks for the feedback. Unfortunately (or fortunately) I am in Mexico and we make our own PCBs. That is another conversation entirely and another of my fix-it projects but currently we drill the PCBs and align the artwork to the holes visually
Electronics Forum | Thu Mar 15 17:50:18 EDT 2018 | sarason
Possibly a loose grub screw on one of the shafts controlling rotation or the sensor ot gray code wheel on the rotation servo motor. or even a small fault in the program eprom, Good luck sarason
Electronics Forum | Thu Mar 15 01:43:52 EDT 2018 | reckless
Unfortunately, I can't give any help but wanted to ask about your experience with the 740 machine? How reliable has it been for you? Would you buy another or upgrade to newer machine? I just bought 2 pm570s arriving tomorrow. If they work out wel
