The sound of the dot matrix is as associated with 1980s computing, as the modem would be with the desktop experience 10 years or more later. In 2023, dot-matrix printers are still useful devices. Why not? They’re cheap to operate and can produce surprisingly good quality when paired with suitable drivers. While cartridges for some popular models are still available, many others are no longer in production. [Drygol] Apple ImageWriter II had exactly this problem. When he discovered that his cartridges weren’t working, he took a look into how to fix them.
A fabric ribbon, similar to that found in a typewriter’s cartridge, is contained within a dot-matrix cartridge. It’s not on a roll but folded into the space, and it’s drawn through by a pair of rollers. In addition to the fabric being dried, the foam of the rollers was also deteriorating. O-rings were the solution after some careful dismantling. Those and a bit of mineral oil to soften the ink had the vintage Apple printing again as though it was the ’80s once more.
It’s a subject we’ve looked at before, as it turns out WD-40 makes a good ink solvent.
