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Thread: Mount and Reservoir Discussion
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01-26-2016, 04:55 AM #61
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- May 2015
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- Near Seattle
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- 23
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.
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01-26-2016, 06:22 AM #62
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- Oct 2013
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- 46
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.
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01-26-2016, 02:36 PM #63
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- May 2015
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- Near Seattle
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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).
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01-26-2016, 05:05 PM #64
- Join Date
- May 2014
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- 60
Hey tosterboy, how small are the leds? I know I've had luck with SOIC-8 packages which, frankly, I thought were going to be a lot more difficult. If that happens to be your package format, sparkfun sells some adapter boards. The other option for you is, (again you'll need an adapter board, really) is get some solder paste, and you can use a toaster oven as a reflow oven.
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01-26-2016, 08:29 PM #65
- Join Date
- May 2015
- Location
- Near Seattle
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- 23
The first set of pressure sensors I got were exactly as specified, 1.6mm x 1.6mm... it's just that I didn't realize how small the contacts on the chip would really be and I am a noob with soldering. (us comp sci guys rarely touch actual hardware). It would be cool if there's an easier way to use these, but if not they were only about $1.56 each so no big deal. I do have a toaster oven.
http://www.mouser.com/ds/2/400/AEAC3...580-525808.pdf
Anyway, I got a different Honeywell sensor with a hole mount and leads that are big enough for alligator clips, so it will be much easier to use. (and I won't have to convert readings in bar into psi with the new one I got).
I think I'll install the sensor into a pipe cap so I can use a pipe T and nipples to adjust to different tubing in the future. I can get a second T and hook up an analog pressure gauge also. I have a spare gauge from when I built my pressure pot for resin casting.
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01-28-2016, 01:14 PM #66
- Join Date
- Jan 2016
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- 14
Printer will print perfect...
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