Search found 73 matches

by david
Tue Sep 03, 2019 9:43 am
Forum: 3DP printing
Topic: Generic powder machine controller
Replies: 19
Views: 65180

Re: Generic powder machine controller

QQ图片20190903104210.jpg
QQ图片20190903104210.jpg (355.61 KiB) Viewed 29360 times
Second version of the PCB.
by david
Sun Aug 25, 2019 8:44 pm
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 22
Views: 69978

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: 26930

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: 22
Views: 69978

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 19136 times
by david
Thu Aug 22, 2019 1:13 am
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 22
Views: 69978

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: 26930

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: 22
Views: 69978

Re: PowderMaker1 3DP printer

so far so good ...
DS2_QuickPrint3.png
DS2_QuickPrint3.png (40.73 KiB) Viewed 24448 times
by david
Thu Aug 15, 2019 11:14 pm
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 22
Views: 69978

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 24465 times
by david
Wed Jun 05, 2019 7:47 pm
Forum: 3DP printing
Topic: PowderMaker1 3DP printer
Replies: 22
Views: 69978

Re: PowderMaker1 3DP printer

Hi, Sorry for my slow update. I'm working on the electronic part. The project is still going and I'll definitely make the first print during this summer. maxt, thanks for your input. Re the commercialisation, it is a bit early to tell as I'm not sure about the total cost and the actually performance...
by david
Mon Apr 08, 2019 9:56 pm
Forum: 3DP printing
Topic: Generic powder machine controller
Replies: 19
Views: 65180

Re: Generic powder machine controller

it'll be something like this,
ctrl.JPG
ctrl.JPG (146.26 KiB) Viewed 30095 times
about 110mm x 105mm x 55mm