Search found 478 matches

by dragonator
Tue Apr 14, 2020 4:19 pm
Forum: 3DP printing
Topic: Grain micro powder printer
Replies: 3
Views: 2287

Re: Grain micro powder printer

It is an ordinary HP45 head, but I can easily fill it with any type of ink I want. I preformed the tests with yellow ink.
by dragonator
Mon Apr 13, 2020 10:05 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 609
Views: 408986

Re: Hacking the HP45

If you swap HEN and TSR (cut the traces and add new wired) it should work.
by dragonator
Mon Apr 13, 2020 9:11 am
Forum: 3DP printing
Topic: Grain micro powder printer
Replies: 3
Views: 2287

Grain micro powder printer

It has been a while since I posted new stuff. I have been (and still am) busy with other projects. One of them is finally finished however. This was Grain, the micro powder printer. Grain overview 1.jpg Grain overview 2.jpg Grain overview 3.jpg Grain overview 4.jpg Grain overview 5.jpg When the Z400...
by dragonator
Mon Apr 13, 2020 8:35 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 609
Views: 408986

Re: Hacking the HP45

Can you tell me exactly where and roughly when you downloaded the files for that board? I recognize that layout, it is the prototype V3.00 controller that I used to have. The pinout was wrong and the layout was fixed, but I simply resoldered 2 wires. The fact that people still have access to that wr...
by dragonator
Sun Apr 12, 2020 2:18 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 609
Views: 408986

Re: Hacking the HP45

@Priyashree2

You will need to add a 10k pulldown to every address. Also before you print you should always wipe the head. Even if you do not use them, floating addresses cause issues. I cannot find any issues with the code you are using.
by dragonator
Sun Apr 12, 2020 2:14 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 609
Views: 408986

Re: Hacking the HP45

I will try to run through all the issues in order. For more information on the printhead in general, go here: http://ytec3d.com/hp45-inkjet-printhead/ The values for the 10X and the TSR are what the controller measures on the 10X resistor and the TSR resistor. Both are supposed to be in the neighbor...
by dragonator
Thu Apr 09, 2020 6:27 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 609
Views: 408986

Re: Hacking the HP45

The pulldown resistors on the address side are not really optional when using TLC59213. Without pull down and address takes well over 1ms to go to low. In your current setup there is a good chance that multiple or even all addresses are open when you print. This prevent the nozzles from firing prope...
by dragonator
Sat Apr 04, 2020 5:43 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 609
Views: 408986

Re: Hacking the HP45

a nozzle can only be on for around 2us. If it is physically on for 12us, it might burn out. You must wait 80-100us to fire again. The ink needs time to flow back into the nozzle. All addresses need to be connected to ground. They are the inputs of mosfets, floating mosfet gates can stay half open, c...
by dragonator
Fri Apr 03, 2020 4:50 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 609
Views: 408986

Re: Hacking the HP45

Hello, I mailed the manual to you. You can manually trigger each nozzle with discrete components but there are a few things you need to do. The printhead is common ground, and the ground needs to be connected all the time. Unconnected ground may cause issues with the addresses. The primitive is high...
by dragonator
Mon Mar 16, 2020 5:38 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 609
Views: 408986

Re: Hacking the HP45

The GTP:-C suggests the printhead is not connected properly. Either the pins do not align with the printhead properly (you can see if you take the controller of the printed part where the printhead pads sit in relation to the pins) or the big mosfet in the middle of the driver is not properly connec...