Geared Peristaltic Quick-Fit Pump Extruder
Description
It's a work in progress, updates will follow, but the basic principle is up-and-running.
This Pump is designed to fit my Quick-Fit X Carriage - thingiverse.com/thing:19590
6-Jan-2013 - Uploaded Sketchup files
Instructions
richrap.blogspot.co.uk/2012/08/geared-peristaltic-quick-fit-pump.html
The Tube is a critical part, it will either work or fail if you don't have the correct type and size of tube.
It needs a normal NEMA17 motor and 624 Bearings for the pressure pump element.
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hmm, you should experiment with a larger tube for the internal and then smaller input and output, that way you get more pressure.
just had another idea on how this could be used, use to pump glue, somehow distribute powder evenly across the bed, have it pump glue where it needs to be bonded, then put down another layer. literally print any shape and with any material that comes in power form, even metal.
Do you by chance have a Sketch-up Model for this? If so, can you post it?
This is awesome!
I'm quite new to this, so sorry if this is a basic question, but would it be possible to have the pump anchored to the frame and use a length of tube connected to the xy carrige? (similar to a bowden) Or would the vacuum lose its effect and allow flow?
Cheers
I want to play around with this, but I either need your quick-fit x carriage modified to fit bronze bushings, or I need this modified to have standard screw holes to fit a bronze bushing x carriage. Ideally, a bronze bushing version of your x carriage would let me use all your extruder designs, which to this point I have not been able to try.
Update: If I can get a good print (the first one I ran out of black ABS 75% of the way through, the second was silver PLA and the overhangs were very droopy because slic3r is not saving my temperature settings), I'll try drilling holes as a temporary workaround to mounting it on a bronze bushing carriage.
I'm ordering 624 bearings and tubing. What diameter (ID/OD), soft/medium/hard (I'm guessing soft silicone)? For reference, I'm looking at silicone fuel hoses on McMaster Carr.
The hardware you are using is M4 correct? What lengths?
How are you going to counteract the pulsating of the peristaltic pump on the nozzle?
Yes, that's part2 :)
The reduction of 4mm ID to 2mm for the nozzle helps, and even at low (manual) rpm I'm getting a good steady flow, time will tell if that stays steady enough when it's actually printing at speed.
And I am using 4 bearings to minimise the pulse effect.
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Here's a way to cut down on the pulsations: http://www.coleparmer.com.cn/e...
I think you could use a single rotor and use a shaped outer race to vary the occulsion of the pair of tubes. May have to build one and try it....
Thanks, I hope to be doing some more testing with this soon