In the course of the assembly system, the Select & Place machine keeps different logs that we can analyse later.
These logs contain a huge range of information including mounting time, speed, decide errors, mount errors, head usage, we can even check kitting information and machine errors too. The Decide & Place machine also registers the program used for every order.
The most common error is an identification error, when the machine fails to identify the component from underneath using its camera. We can improve the success rate with light settings or with reteaching the component to the machine.
Sometimes the parts get stuck in the feeders or tubes so that the machine cannot decide them up. In that case we need to manually remove the parts, and adjust the component feed for the machine to decide up again.
We also get errors when the correct pick-up head is not selected, or when fiducials are not detected. Our machine operators are there to solve these kind of errors.
We have some parts which we cannot mount or require special care:
Minimum pitch: Components with a minimum pitch of 0.4 mm can be placed. For smaller pitches, we evaluate part by part for the mounting possibilities
Special components – special tools: Special components need special tools, such as LED’s with lenses, special connectors, edge connectors, MELF components,… For prototype production it can be more efficient to place such components by hand..
Minimum tape length – extra components needed: The tape width should be at least 8 mm and we need a minimum 50 mm to push the tape into the feeder. For tube and tray components we do not have these limitations. For smaller components up to 1212, we require at least 10 extra parts in the tape, for other components we require 1 extra component.
Sometimes, the Decide on & pcb pick and place machine rejects components, the reasons can be due to a number of factors including incorrect decide on up, bad vacuum, excess placement head acceleration or failed identification.
The Pick & Place machine has a bin where it drops these parts which are presumed bad or not identified.
Sometimes components drop while moving and get lost in the machine, from experience our engineers try to optimise the pick’n place programs to avoid such errors.