olivier.berlinTo refill my pens during large plotting projects, I designed and built a tiny peristaltic pump. It only moves ~1 ml of liquid per minute, but even that is way too much. I only need 1ml per hour. But a good thing is that pumped liquid remains in the tube which means I can power on the pump for a few seconds every few minutes. The pump runs on 4V DC and consumes ~30 mAh.
DarekPages@olivier A type of pump used in inkjet printers. What ink will you use? How will you transfer it to the paper, there must be some kind of print head. Will the ink drip onto the paper lying horizontally?
@darekpages I plan to refill Edding permanent markers with their refilling ink. The ink however is quite sticky and dries fast which prevents me from using motorized syringes. What I learned from my previous plots is that my pens use ~1 g of ink per hour of plotting. And when I refill them after one hour, I get a noticeable color change which I don't like. And refilling more often is tedious. So this is my overengineered solution 🙃