[vfsi]

In a previous life I built a RTV Silicone glue dispenser for a medical product manufacturing line. The bead size tolerances were very tight. And the glue needed to be in a circle at the bottom of a 3in x 3in cup.

I used a pneumatic caulking gun to preload a small gear pump connected to a DC speed control gear motor (~100 rpm). The controller had regenerative braking so it stopped quickly. I had to anticipate the extra flow but the thing was reliable as a rock.

I was told it wouldn't work, by many experts. Just goes to show, those that don't know any better just do it anyways.

Find the stuff on ebay for a cheap solution.

[kevinsull56]

We had been using pneumatic dispensers for dispensing micro dots of paint for years until I found this air free dispensing system. They offer several different types of dispensing systems for assembly.

This is what they say:
Control and monitoring of a consistent repeatable assembly fluid deposit worldwide resulting in increased bottom line profits through higher productivity, fewer rejects, less fluid waste and lower production costs.
See fishmancorp for more details.