Search found 473 matches

by dragonator
Sun May 17, 2020 5:11 pm
Forum: 3DP printing
Topic: Grain micro powder printer
Replies: 3
Views: 1926

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...
by dragonator
Sun May 17, 2020 9:03 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

bigbomber wrote:
Fri May 15, 2020 12:41 pm
Hi Friends.
Something new is going on...
by-MahdiSohrabi_1.gif
You printed that? It looks incredibly detailed.
by dragonator
Thu May 14, 2020 6:31 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

I had to get the schematic out because I forgot that the address order is not actually 1-22 but is optimized for routing the PCB. If each of these was the only pin to be 12V, this is good. The order you described is the order of the addresses. All addresses you measured seem to be working, which mak...
by dragonator
Tue May 12, 2020 6:18 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

A poorly connected head might, but even that would be bad luck. A bad head should not be able to damage the controller. A printhead is filled with fragile heater resistors that will break in such a way that they no longer conduct. A non-conducting heater resistor will not do anything bad to the cont...
by dragonator
Mon May 11, 2020 5:50 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

At this point I am worried that either IC1 or IC5 has failed. The fact that both got hot is a bad sign. Either can stop the address side control from working. 2 manual override commands that might help you. "ANX" is address next. It simply goes to the next address. "ARS" is address reset. It puts th...
by dragonator
Mon May 11, 2020 2:33 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

The bending of the connector is normal. The mounting holes are in the middle, and the springs on the side, so it is bound to happen. The springs usually compensate for this. One question. Do you have gold plated PCB or, tin plated?
by dragonator
Mon May 11, 2020 5:21 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

If the head only shows a temperature when you push it really hard, the carrier you printed is wrong. Probably the pins do not protrude far enough out to properly contact the printhead. If the temperature shows, it is an indication that some pins are connected, but you only need 3-4 pins to connect c...
by dragonator
Thu May 07, 2020 10:41 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

The VHEAD is an option for the future. Officially, the HP45 has a variable voltage on the primitives. Depending on the type of ink, state of the head, and environmental factors, the voltage required to fire a primitive is variable. On the C8855 controller there is a variable voltage available. The p...
by dragonator
Mon May 04, 2020 2:26 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

Hello Nabi, If anyone would invest the time trying it, I think it would be possible. All the required parts seem to be there, and I think you can have enough control to integrate it into a diy printer. Do you have any special interest in full color heads? However I am not going to pursue products li...
by dragonator
Sun May 03, 2020 8:54 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 596
Views: 394526

Re: Hacking the HP45

I do have a small list of patents that might be interesting: EP0705695B1: HP45 function and layout EP0707967B1: The same but patenting something else US5648805: I think the US patent for one of the above US6866364: How a printer is made from HP45 I think US5363134: A pre HP45 head US5635968: One of ...