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01-13-2016, 12:26 AM #21
- Join Date
- Sep 2013
- Posts
- 308
Mostly because we havent figured out a way that we can do this for with in the 100 dollar price point we have not tested this enough to really have an opinion on how well it can work. I have built more expensive printers that can do this but Ive barely used them with a feature like you suggest above.
I highly encourage pump hacks! like Slatye says some layers take longer than others, but the dripper wont slow down for those layers, so you have to drip at a rate that gives your longest layer time to print.Last edited by rylangrayston; 01-13-2016 at 12:33 AM.
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01-13-2016, 07:07 AM #22
- Join Date
- Mar 2014
- Posts
- 13
Yeah. Stepper pumps are a bit more. However, I was thinking that it could be possible to use a stepper like this for $5:
https://www.adafruit.com/products/858
There are chips to control it, as you know, but for simplicity one could use this for an additional $5:
https://www.adafruit.com/products/2448
The pump head is the most expensive, but there are ways to do it cheaply to keep costs down. Like:
http://m.instructables.com/id/Inexpe...istaltic-pump/
And:
http://blogs.rsc.org/chipsandtips/20...istaltic-pump/
It seems like it wouldn't take more than $10 to $15 more in single quantities and less if you build your own drivers.
Not that I am advocating it for initial release. ;-) Maybe after we get our printers some of us can figure out the cheapest way to make that happen so that others can make use of it.
On a side note, one other thing I considered was the idea of viewing water level as a linear servo.
In this view, a small dc peristaltic pump is the motor. A variable resistor water level sensor is used to detect position like: https://www.adafruit.com/products/464
Then a cheap servo can be sacrificed and used to control water level by having the electronics drive the pump based on the water level feedback.
To bring this back on topic, controlling water level is going to be my way to avoid issues with surface tension, and these are the ways I was thinking of doing it.
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