Mount and Reservoir Discussion

[rylangrayston]

Okay well how about another resevoir question? I searched but nothing came up, unless my wording was off.

Anyways: would it be possible to somehow configure/rig/hack the peachy to print multi-colored pieces? Like invest in a slightly bigger pump/print mechanism to hook 2 resevoirs up to? or is that thinking too far ahead at the moment? :P Just curious.

great minds think alike...
http://peachyprinter.ipbhost.com/ind...ial-raft-hack/

[MistahBradley]

great minds think alike...
http://peachyprinter.ipbhost.com/ind...ial-raft-hack/

That actually makes more sense than what I had in mind: imagine an external pump connected to 4 resevoirs via tubes.... I'm no engineer by any means xD But at least it has been brought up before. Can't wait to see where the Peachy production ends up at :P

[Toasterboy]

That's way cool. You could sort of print in full color that way. I guess the question is whether you would be selecting one of n colors per gcode line segment (probably simplest way to do it, with n being 3 or 4), or if you would lase the same spot multiple times under different resin pools in order to try to mix a custom pigment for each line segment, and how well such mixing might work out. You definitely would not be limited to having whole layers be the same color, but this would probably slow down maximum printing speed and introduce surface waves to deal with potentially. Probably is more difficult to pull off the more separate colors are attempted.

Another approach might be to rig a gantry that follows behind the laser spot and dumps or sprays pigment powder onto the curing resin gel.

[Synchron]

i hope that someone would test the color-fill-method.
Print a hollow object with multiple seperate chambers and fill the cambers after the print with colored resin.
The problem is the shrinking of the inner-resin. Maybe it is strong enough to crack the shell.

[Toasterboy]

Resin doesn't really shrink much when it cures in a mold anyway, at least, the casting resins I have used don't. Plaster and hydrostone are also rather dimensionally stable. If anything you would have problems with the resin foaming and expanding from contact with water left in the print. Unless these "fill-behind" chambers are very large with adequate escape vents, you also would have problems with air bubbles and getting your chambers to fill unless you also cast in a pressure chamber, so I would think the raft idea above is more feasible? Automating the creation of the fill behind chambers in the model might be challenging as well (i.e. like implementing the auto support features of various slicers).