Hello everyone,

We use a Systems ProJet 660 Pro 3D printer which works with HP11 print heads. The problem is that HP has stopped production of these heads. Additionally, each replacement triggers a massive purge of binder, which wastes a lot of consumables.

We have found compatible heads (e.g. AliExpress), but they only work one print before being considered “to be replaced” by the machine, while they are still new.

I am therefore looking for people interested in hardware hacking / reverse engineering in order to: • understand the print head validation mechanism, • possibly disable or bypass the software check that forces the replacement, • extend the lifespan of equipment (objective: limit obsolescence and waste).

Have you ever heard of similar projects (EEPROM reset, chip emulation, firmware patch) on this type of machine? Or do you know of active communities in this area?

Thank you in advance for your advice, suggestions or feedback!