Search found 482 matches

by dragonator
Mon Sep 14, 2020 6:32 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 622
Views: 441940

Re: Hacking the HP45

I do think that the primitive time can be assumed to be constant. I have no reason to believe otherwise with the C8855 manual. Given the high power nature of the signals, giving us rise and fall times that are significant, and the measuring hardware, some variance is to be expected/. This seems to b...
by dragonator
Wed Sep 09, 2020 2:58 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 622
Views: 441940

Re: Hacking the HP45

It seems a worthwhile goal you have. A machine like Oasis would already be able to print PCB's, so I see no reason why you should not be able to do something like that. If you need any information on refilling printheads or making heads CISS, let me know. I do have some experience with that. If you ...
by dragonator
Thu Sep 03, 2020 4:31 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 622
Views: 441940

Re: Hacking the HP45

I would be curious to see what the timing on an original printer is on several channels. For all the work I have done, I never actually have had a working printer to reverse engineer. There is so much I still do not understand, though being able to just print is already fine by me. Is there a specia...
by dragonator
Thu Aug 27, 2020 4:22 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 622
Views: 441940

Re: Hacking the HP45

Hello and welcome, I have mailed you the C8855 document. 2us was my first known time. Then with the manual it became around 1.8us. However, I have only seen 500ns used for heatup pulses. I have tried with lower pulses of 600ns, and with me it does not cause any ink to jet. I use this for warmup, but...
by dragonator
Mon Aug 03, 2020 5:33 pm
Forum: 3DP printing
Topic: Tethon ceramic powder
Replies: 4
Views: 1008

Re: Tethon ceramic powder

I have printed some more with Tethon. The ideal inkjet saturation seems to be 210%, or 1260DPI in the weeping direction (and 600 in the other) at a layer thickness of 0,1mm. I have printed a Moai, and a scaled espresso cup. Scaled so far, because I am not made of time. Once I know I can fire I will ...
by dragonator
Sat Aug 01, 2020 2:12 pm
Forum: 3DP printing
Topic: Tethon ceramic powder
Replies: 4
Views: 1008

Re: Tethon ceramic powder

Hello, Earthenware and porcelain are both roughly the same whiteness (unfired). I have yet to fire any parts. None of my printers have integrated vacuums. Is that the aspiration conducts you are referring to? The feeding of the Tethon powder is fairly nice, though the surface does tend to be a bit r...
by dragonator
Wed Jul 22, 2020 4:01 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 622
Views: 441940

Re: Hacking the HP45

I haven't. I still have 2 TLC's. The TLC59213 does not seem to be the bottleneck. If you fire all 14 primitives on one address, it just becomes unstable. I now fire 5-5-4 on every address and it works fine, though a bit slower. I still do not have a clue as to why I cannot fire all 14 primitives at ...
by dragonator
Fri Jul 17, 2020 6:02 pm
Forum: 3DP printing
Topic: Tethon ceramic powder
Replies: 4
Views: 1008

Tethon ceramic powder

There has been quite a powder printing silence for the last few months. I have been busy, but not everything worked, and not everything was sharable. On of the things that I now can share, is that I am working with 3D printed ceramics from Tethon. I got samples of stoneware, terra cotta, and porcela...
by dragonator
Thu Jul 16, 2020 5:31 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 622
Views: 441940

Re: Hacking the HP45

Hello It has been a bit silent indeed. I myself have been rather busy the last months, and haven't gotten around posting as much as I wanted. Reading all of it must have been quite a read. The HP45 page has grown quite a bit over time. I have sent the datasheet by mail. I myself still haven't had mu...
by dragonator
Sun May 17, 2020 5:11 pm
Forum: 3DP printing
Topic: Grain micro powder printer
Replies: 3
Views: 2746

Re: Grain micro powder printer

I have started printing with the micro printer. I have not yet started with serious materials and mixes, but I have had some tries to get a feeling for the printer. First I tried construction plaster. It spread horribly and leaves a rough surface. It also is completely unbound by the binder. Even 30...