Search found 575 matches

by dragonator
Sat Jan 21, 2023 9:14 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 729
Views: 857508

Re: Hacking the HP45

The pogo pins not connecting might be a cause, but you'd have to have an issue where a random address IS connected, and the rest isn't while all primitives are properly connected and most grounds are. If there was a random pattern I could believe you had a bad pogo pin connection, but with what seem...
by dragonator
Fri Jan 20, 2023 6:24 pm
Forum: 3DP printing
Topic: Standalone controller V4.0
Replies: 58
Views: 32200

Re: Standalone controller V4.0

I will have to post this at some point in more detail, but until further notice I do not plan on continuing the HP45 stuff. I might pick up small projects including it, but I have no real interest in pursuing the HP45 as a core project. The V4 will be fully shared, and the firmware and software are ...
by dragonator
Thu Jan 19, 2023 7:34 pm
Forum: 3DP printing
Topic: Standalone controller V4.0
Replies: 58
Views: 32200

Re: Standalone controller V4.0

When I try and hold a ruler to the lines, I have a hard time finding a walking error. There is definitely a small shift on the right most bit, but over the rest I have a hard time spotting a stair step. It looks more like a zigzag. Can you verify that the head is perpendicular to the axis? It seems ...
by dragonator
Thu Jan 19, 2023 7:26 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 729
Views: 857508

Re: Hacking the HP45

Can you start by sending me a good photo of your setup, driver board and controller board. I suspect I won't be able to see much, but we can at least try.
by dragonator
Sun Jan 15, 2023 10:07 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 729
Views: 857508

Re: Hacking the HP45

Given the small number of round dots I see here (only 14), I am fairly certain that all primitives are working, but addresses are not advancing. Either the mosfet level shifter is not working, or the 4081 chip is not working. Do you have the capability to test the addresses on the board?
by dragonator
Sat Jan 14, 2023 4:17 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 729
Views: 857508

Re: Hacking the HP45

Can you show a print? I suspect with the prime the image is over saturated with ink. I want to see if the ink is really there in 7 perfect lines, or if there is a bit more of a mess going on. I suspect that your 4081 chip is either not working, or not connected properly. This would stop the data fro...
by dragonator
Sat Jan 14, 2023 4:11 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 729
Views: 857508

Re: Hacking the HP45

That pattern is indeed a bit too perfect. I assume that the nozzles 0-300 go from top to bottom? What strikes me as weirdest is the fact that you have 7 bars. Each side of the printhead has 7 primitives, so 7 bars is fine, but if you were missing primitives I would assume to see 3-4 bars, not all 7 ...
by dragonator
Fri Jan 13, 2023 7:00 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 729
Views: 857508

Re: Hacking the HP45

If you test the printhead, do you get 300/300, or do you get less? If you get 300/300, the nozzles are firing, and it is not addresses you are skipping. HP45 heads clog easily, and cleaning them properly with only water is not enough then. You want isopropylalcohol and a paper towel, and really soak...
by dragonator
Sat Jan 07, 2023 6:23 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 729
Views: 857508

Re: Hacking the HP45

I was not aware of the swapped direction of the encoder connector. The fix you proposed will work fine, but it is not one I can push to the new firmware since it might break other setups. Another fix is swapping A an B channel, but all are a bit iffy. incorrect swipes do sometimes happen on the firs...
by dragonator
Fri Jan 06, 2023 6:38 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 729
Views: 857508

Re: Hacking the HP45

The issues do not seem to come from the software, and even though I have no clue why, they seem to be coming from the controller. If you have one you can try, but I would not make one just to test this.