Search found 65 matches

by david
Tue Sep 03, 2019 10:24 am
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 132
Views: 27106

Re: Hacking cartridge HP 84/85

Hi, do you guys now know the timing/protocol of this printhead? I briefly went through this thread and found a lot of LA capture and discussion. If I missed something, please point me to the conclusion page. I'm thinking, if you don't mind, I can probably programme my ink jet controller to support t...
by david
Tue Sep 03, 2019 9:49 am
Forum: 3DP printing
Topic: Generic powder machine controller
Replies: 4
Views: 866

Re: Generic powder machine controller

Do you solder the motor drivers to your board, or do you have the headers like a RAMPS board does. The driver board is included but separated as the vertical PCB. There bunch of signals from the main board to the driver board under the FPGA control and a few other generic signals like I2C. So it is...
by david
Tue Sep 03, 2019 9:43 am
Forum: 3DP printing
Topic: Generic powder machine controller
Replies: 4
Views: 866

Re: Generic powder machine controller

QQ图片20190903104210.jpg
QQ图片20190903104210.jpg (355.61 KiB) Viewed 120 times
Second version of the PCB.
by david
Sun Aug 25, 2019 8:44 pm
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 21
Views: 3239

Re: PowderMaker1 3DP printer

first printhead real test at https://youtu.be/9Dy6aHJh8QI

It's base on 50% alternating nozzle on and off. The printhead under test is a 5 colour version instead of a 6 colour printhead in the final version.
by david
Fri Aug 23, 2019 7:12 pm
Forum: 3DP printing
Topic: Firmware for 3DP printing with 2 powder station.
Replies: 7
Views: 326

Re: Firmware for 3DP printing with 2 powder station.

I think you can try multiple magnetic powders and one final non-magnetic powder: apply first magnetic powder, print it, take the excess away; apply second magnetic powder, print it, take the excess away; ... ... apply nth magnetic powder, print it, take the excess away; finally apply non-magnetic po...
by david
Fri Aug 23, 2019 6:04 pm
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 21
Views: 3239

Re: PowderMaker1 3DP printer

My make of the test ink:
+ 200ml water
+ 10ml surface cleaner
+ a few drops of ink from my son's fountain pen
+ a little IPA to get rid of the foam
and finally filter the mixture.
20190823_185153.jpg
20190823_185153.jpg (136.46 KiB) Viewed 119 times
by david
Thu Aug 22, 2019 1:13 am
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 21
Views: 3239

Re: PowderMaker1 3DP printer

that's mixed of literature study, reverse engineering, wildest guess and some of good luck. My plan is to try it with the real head in a few days. There is still some firmware work and ink set up. so fingers crossed.
by david
Thu Aug 22, 2019 1:02 am
Forum: 3DP printing
Topic: Firmware for 3DP printing with 2 powder station.
Replies: 7
Views: 326

Re: Firmware for 3DP printing with 2 powder station.

so ... how would you recycle the powders for next printing? ... unless one of them is much heavier or magnetic ...
by david
Sun Aug 18, 2019 6:17 pm
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 21
Views: 3239

Re: PowderMaker1 3DP printer

so far so good ...
DS2_QuickPrint3.png
DS2_QuickPrint3.png (40.73 KiB) Viewed 331 times
by david
Thu Aug 15, 2019 11:14 pm
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 21
Views: 3239

Re: PowderMaker1 3DP printer

It has been sometime. I'm still working on the printhead to implement a proper driver. For someone might be interested, a driving waveform has been enclosed.
waveform.png
waveform.png (63.33 KiB) Viewed 348 times