Quote Originally Posted by cephdon View Post
Wow, I like the ideas presented in this thread. One thing I can't help but consider is that the peristaltic pump could be modified to use a stepper motor and we could eliminate the need for drips and mic inputs. A 32x or 128x microstepping driver with a sufficiently small step size motor would provide more than enough resolution. You could then just drive the pump to increase the water height as much as you like. It should be pretty precise since you can control the exact number of steps and therefore the exact volume of water that is pumped from the reservoir to the 3d printing tank.

It just seems to me that having a pump controlled by stepper eliminates much of the uncertainty of drip speed, timing, etc.

Great idea, I do believe I could do micro-stepping from my light switch picaxe circuit, without to many additional components