Search found 24 matches

by math
Tue Sep 15, 2020 2:49 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 624
Views: 481823

Re: Hacking the HP45

I have one unresolved issue that is a major headache. I cannot pulse all 14 primitives at once. I need to pulse 5,5 and 4. Else I am getting misfires. HP seems to manage just fine, driving the head as fast as humanly possible, all primitives on one address all at once. I have no clue whatsoever why...
by math
Sun Sep 13, 2020 9:53 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 624
Views: 481823

Re: Hacking the HP45

Despite your objection to the accuracy of the logical analyzer (200 ns), I think it is not enough to explain the divergence between the measured values and those indicated in the patent. What catches my attention the most is the interval between firing the address line and firing the primitive line....
by math
Sun Sep 13, 2020 6:19 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 624
Views: 481823

Re: Hacking the HP45

From the files from acastel, I think the following measures are worth considering:
primitive pulses to warming = 0.6 us
primitive pulses to print = 2.2 to 2.4 us
address pulse duration before applies primitive pulses=~12 us
by math
Mon Jan 14, 2019 3:20 pm
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 162
Views: 101020

Re: Hacking cartridge HP 84/85

This is a required reading in hp cartridge controll:

http://spritesmods.com/?art=magicbrush

This guy is a genius in reverse engineering!!!
by math
Fri Nov 16, 2018 11:33 am
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 162
Views: 101020

Re: Hacking cartridge HP 84/85

No. I'm working on a hp 664, similar to that on video. But by now I have nothing to share :|
MAsic12345 wrote: Thu Nov 15, 2018 7:29 pm
math wrote: Thu Nov 15, 2018 6:22 pm @dragonator
I love this video! Thak you very much!!! Coincidentally I'm working in this cartridge.
you work with a cartridge HP 84?
by math
Thu Nov 15, 2018 6:22 pm
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 162
Views: 101020

Re: Hacking cartridge HP 84/85

@dragonator
I love this video! Thak you very much!!! Coincidentally I'm working in this cartridge.
by math
Fri Oct 12, 2018 7:39 pm
Forum: 3DP printing
Topic: Oasis 3DP printer
Replies: 41
Views: 61796

Re: Oasis 3DP printer

Great job!!!!
by math
Mon Oct 08, 2018 11:09 pm
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 162
Views: 101020

Re: Hacking cartridge HP 84/85

@Wonko

Thanks!
by math
Mon Oct 08, 2018 12:29 pm
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 162
Views: 101020

Re: Hacking cartridge HP 84/85

II guess that this patent is the answer to protocol and other details related to the printheads like hp 84, hp 88, hp 11, that seem to use same circuit:

https://patents.google.com/patent/US6705694
by math
Thu Oct 04, 2018 10:37 pm
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 162
Views: 101020

Re: Hacking cartridge HP 84/85

@dragonator

What do you think about 15?