This is the best I can find an open source printers, It uses an ancient HP black cartridge that’s still in production which provides you the heads. The cartridge is pretty cheap.
The problem is the ink they use brings more to the table than just being expensive. Unless you intend on using a ballpoint pen plotter or you’re going back to Dot matrix, you can’t just deliver regular ink to a page. The piezo-electric nozzles need a very specific density and viscosity, It needs to dry at just exactly the right time and be able to be cleaned off the nozzle with the lightest wipe. The ink and the nozzles have 50 years of experience behind them.
Making a head go across the page with precision and high resolution is a very well solved problem, couple of steppers some electronics Legos and a 5-minute Google search you could get that part going. But you’re going to have to use somebody’s printheads and ink because that’s well beyond DIY scope.
You can use that kind of HP cartridge and also modify it to take ink from a reservoir. It’s perfectly possible to buy ink suitable for an inkjet printer in bulk for much cheaper than HP will sell it to you, and that kind of reservoir mod will let you use the print head built in to the HP cartridge.
This is the best I can find an open source printers, It uses an ancient HP black cartridge that’s still in production which provides you the heads. The cartridge is pretty cheap.
https://www.instructables.com/Make-a-Handheld-InkJet-Printer-Print-on-ANY-Surfac/
The problem is the ink they use brings more to the table than just being expensive. Unless you intend on using a ballpoint pen plotter or you’re going back to Dot matrix, you can’t just deliver regular ink to a page. The piezo-electric nozzles need a very specific density and viscosity, It needs to dry at just exactly the right time and be able to be cleaned off the nozzle with the lightest wipe. The ink and the nozzles have 50 years of experience behind them.
Making a head go across the page with precision and high resolution is a very well solved problem, couple of steppers some electronics Legos and a 5-minute Google search you could get that part going. But you’re going to have to use somebody’s printheads and ink because that’s well beyond DIY scope.
Can we get diy perks on this problem
You can use that kind of HP cartridge and also modify it to take ink from a reservoir. It’s perfectly possible to buy ink suitable for an inkjet printer in bulk for much cheaper than HP will sell it to you, and that kind of reservoir mod will let you use the print head built in to the HP cartridge.