There are many types of inkjet cartridges available in the consumer market. However, very few of companies make it easy to interface with their cartridges. This page will define a "good interface" as one which can integrate with RepRap electronics and software. Below are some notes on cartridges and implementations that may be of use to someone exploring powder printing, or different deposition methods and materials (such as resin or bacteria) .
See also this page: Scratchbuilt Piezo Printhead.
The HP TIJ is a series of inkjet cartridges available from HP that are designed to be easy to interface with. There is a PDF from HP available here, which describes the two models in depth. Below are some potential use cases and notes on applications to RepRaps.
The 1.0 comes in two sizes, the 51604A, and the C6602x.
Amberish Jaipuria created a very through research paper on using the 51604A and 51605B/R. It thoroughly covers the theory of operating the inkjet head and some attempts at integration with RepRap. File:Inkjet.pdf
Note: it would be good to 'uncompact' this pdf into a proper wiki page.--Sebastien Bailard 07:02, 6 May 2010 (UTC)
We will need to contact Amberish about expanding his research into a wiki page.
A higher resolution cartridge than the 1.0 capable of faster nozzle firings. As of 2013-10-20 there has not been a documented application within the RepRap, or open hardware, community.
Traditional multiple head inkjet printers use a droplet overlap method. For some research there are times when clear boundaries between colors are desired. Both methods are explained below.
CMYK (Cyan, Magenta, Yellow, Black) overlap is the traditional method and process of producing color images from an inkjet printer. The droplets are oriented to overlap to give color mixing. In addition halftones are used to create color gradients by altering droplet size. More information about the CMYK process can be found on the Wikipedia page. When applied to additive manufacturing this allows for material mixing and grading.
OpenFab is an open-source implementation of this process for additive manufacturing.
Boundary preservation is a much simpler implementation of arranging deposition for inkjet printing. It is useful in arrangements where grading is not necessary and accuracy is more valued. Possible applications are circuit fabrication and bacteria deposition.
Image_to_gcode is a Python 2.7 script to take BMP images and generate G-Code paths that preserve the boundary between pixels. Further documentation is available on GitHub at the aforementioned link.
- Heated Piezo for Jetting Wax
- Actuator Fabrication mentions fabricating piezo actuators
- "a drop-on-demand device": "One of the potential uses for the print head is for powder printing (where the print head drops a solvent and/or binder on a bed of powder in order to bind the powder together in the appropriate places)"