Hacking the HP45

evomotors · Post by **evomotors** » Tue Oct 18, 2016 2:19 pm

I'm sorry, I misunderstood you. Now I see what you mean, I still need to convert the bitmap into 1Bit format, but with the pattern simulating the grayscale like the attached example image

I wrote a simple program to convert image to halftone (1Bit format) grayscale for testing.

YouTube · Post by **dragonator** » Tue Oct 18, 2016 4:13 pm

Looks good. Do that with 4 colors and you have a full color image. What did you write the program with?

A small announcement. I am quickly reaching the point where I don't want to move the printhead by hand anymore. I am currently pushing through the last changes in the housing, gantry and initial simplified piston design of Oasis. This is by no means the final form of Oasis, but the first form I will test with. It has a piston with a diameter around 70mm and a stroke of roughly 50mm. It is not the biggest but incredibly simple. In the future I will redesign the gantry and pistons.

: Oasis Y00 WIP5.jpg (131.09 KiB) Viewed 17983 times

: Oasis Y00 WIP5 piston.jpg (246.41 KiB) Viewed 17983 times

evomotors · Post by **evomotors** » Tue Oct 18, 2016 5:21 pm

@dragonator -The program written in C#. It converts color image to 4 (CMYK) 1-Bit bitmaps

evomotors · Post by **evomotors** » Tue Oct 18, 2016 8:16 pm

Example of all 4 layers in 1-Bit pixel format. In order to test I'll need 4 assembled controllers.

YouTube · Post by **dragonator** » Wed Oct 19, 2016 4:04 pm

Attached are the Gerber files and the HP45 V1.01 controller source in beautiful Fritzing format. Good luck with it. If you are looking for me, I will be designing Oasis.

evomotors · Post by **evomotors** » Thu Oct 20, 2016 12:50 am

Thanks for posting the design files and for all good hard work you have already done!
Oasis going to look cool.

jnesselr · Post by **jnesselr** » Sun Oct 23, 2016 7:59 pm

Has anyone found individual CMY cartridges fitting this form factor and pinout? The only thing I've been able to find so far has been the larger one with all 3 integrated together.

evomotors · Post by **evomotors** » Sun Oct 23, 2016 8:43 pm

What's wrong with cleaning 3 HP45 and filling them with cyan, magenta and yellow? I'm planning to use HP45 for CMYK with continuous ink supply.

jnesselr · Post by **jnesselr** » Sun Oct 23, 2016 9:03 pm

Oh? How do you plan to clean them? The last time I tried cleaning the hp tij 1.0 based heads, I had to take a hack saw to it and open it up to totally clean the sponge out.

I'm also very curious about your continuous ink system.

evomotors · Post by **evomotors** » Sun Oct 23, 2016 9:20 pm

HP45 is hollow and does not have sponge.

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