I’ve also been alarmed by the high error rates. My mis-pick rate is closer to 5% though with 0805 resistors / capacitors. I’m curious what speeds you are running the various tasks at. In general, my current project is running at about 50%
I’ve made a futile attempt to document my experiences with the machine, hoping that others - as well as myself - could benefit from it. I’ve jotted down a few things, but mostly I’ve dwelled on the machine’s shortcomings and brainstormed ways to improve manufacturing efficiency.
Here are some of the most common assembly line problems I’ve encountered, not including sticking my thumb in fresh solder paste…
Components are placed 90 degrees off axis;
Components are not dropped correctly or in some designated area when pick is faulty;
There isn’t an ideal setting for vacuum pressure faults.
Tape peel gears get jammed sometimes;
Components get stuck all over the pace;
Tape doesn’t get pulled forward because gear slips.
Component flips over because of tape bracket peel design flaws;
Pick nozzle calibration drifts;
Tombstone picks are common.
Transportation and Orientation Errors:
Part lost from excessive spin inertia or poor vacuum.
Partially dropped components.
Faulty Pick Nozzle:
Sometimes the nozzles don’t retract properly and pick / place height is off.