Powder and inkjet printing
Thanks for the help davidk. So your main ink reservoir is just open to atmospheric pressure and the ink is gravity fed to the ink damper? Did you have any trouble controlling the flow of ink so that your prints wouldn't be saturated? And maxt, I have just been using an Arduino Mega which can output 5V.
I Branden, thanks, I know about arduino, however if I do this it has be a full color printer. I.e. 5 heads. I rule out arduino cause I doubt it would be able to drive and synch all of these heads. Some recent teensy (3.3V) should be ok, if they have enough pins.
Teensy have enough pins. If you need more, Arduino Due are an option (ARM CPU). Xaar heads use a serial protocol and can be daisy-chained. If you can be fast enough, you can control as many heads as you wish with the same control pins.