I also have a positive displacement paste dispenser. A paste syringe is
screwed into the unit and has a small +ve air feed into the end of the
syringe to help feed the paste. The unit has a small DC motor that runs
The paste is fed by an auger (looks like a 3mm ballscrew). The auger is
driven by the DC motor via an electronic clutch. To dispence the paste,
activate the clutch, to stop, deactivate. This head is off a
commercial machine and is quite heavy. It's about 10" tall 1.5"
diameter. Also has a mic adjustment on a dovetail slide to set the
Haven't played around with it much but it does seem promising.