MYDATA MY500 JetPrinter Machine Systems
P-030-0014-EN – Service Manual Rev. 0003 2008-06 3 - 15
The ejector
The ejector is a wear part. It requires no internal cleaning or disassembling.
The ejector carry the piezo unit which generates the force needed to eject the
solder paste through the ejectors nozzle.
The ejector main parts are:
1. Filter box connector.
2. Feeder screw.
3. Piezo unit.
4. Nozzle
The principle is that solder paste is fed into a nozzle chamber by the feeder
screw. Voltage is applied to the piezo unit. The piezo hits a piston which ejects
the solderpaste.
The filter box
The filter box function is to collect any waste solder paste. This will ensure
that the PWB is nor contaminated with solder paste in the wrong place. The
filter box is screwed on to the solder paste cartridge. It is applied before
installing the cartridge into the holder.
Figure 3-17. Ejector.
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