I am working on a micro dispensing system, using syringe pump. The design involves a syringe on top to be moved by stepper motor. There would be one liquid reservoir form which the syringe would pull liquid from, and push it to eject liquid from other end.
When we pull the syringe, the liquid is sucked into the syringe, while the other opening is shut. When the syringe is pushed, the liquid is ejected from the other end.
The quantity of liquid to be dispensed would be very small (400mg) so i am using small syringe of 1 or 2 ml .. as per my measurement, after every 100 dispensing operations, 1 ml syringe would be empty and we would need to pull liquid from the reservoir into the syringe, and do the dispensing again.