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by nighthunter
Fri Dec 01, 2023 11:29 pm
Forum: 3DP printing
Topic: Hacking a HP #20/#49 head
Replies: 0
Views: 64548

Hacking a HP #20/#49 head

Hi friends, i am trying to make use of HP 20 and 49 heads as they are only dumb resistors in the cartridge, but i looked at the waveform that drives the nozzles, Vpp seems to be around 16V (Primitive resistance is aroud 33R), but it seems that for every nozzle from one color (or better say union as ...