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In Action: Jim's Flying Motor Mount Dual Extruder

by doctek Jul 27, 2013
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What a lovely use of angles! And not just square ones. I like the way you have packed the two extruders.

I'd like to see this sorted out, with some solid examples of perfect extrusion at say 60mm/sec and also 10mml/sec. I think the idea is great and I bet that it would fit perfectly on the printrbot simple, but my extruder works perfectly right now. Where as the pink/yellow sample is EEEK! :)

The example shown is (really) my first extrusion and wasn't that great. Have a look at my Thing for the calibration piece for significant improvement and read the comments below for more discussion about retraction, wipe, etc.

I love the fact that you are thinking outside of the square, as far as your design is concerned, nice job!!

Jim, nice job I just printed my first one. I will take your advice on the 5mm restart/1 mm extra on restart.
I am new to 3D printing, still trying to figure a lot out.
Did you use any supports?
Any other advice on settings?

There is nothing about this design that will change the basic design rules for printing. The usual rule is that if you print with an overhang greater than 45 degrees, you will need support. YMMV. One thing this design offers is the option of using a different material for the support. This might be a water-soluble material like PVA, or another color of plastic so it's easy to see when it's all removed.

Jim, that looks really promising. If you haven't tried yet, there is a Wipe module in Skeinforge that will take the extruder to a cleaning area, and wipe the nozzles. You would probably want to cool the inactive nozzle during the cleaning, to prevent ooze.

For the Wipe material, you can try a pipe sweating heat cloth (not sure what it's called), like a plumer uses when soldering copper pipe. The Home Depot sells them. Cut a piece off and mount is to the Z axis somewhere.

The video was of (really!) my first print after calibrating the nozzle offset. I've since done more experiments using retract-during-layer-change (5mm retract / 1mm extra on restart) and greatly reduced the drool (ooze). I'm planning more experiments to tune things more, but I'm hoping not to need a wipe.

But if wipe is what's needed, then I think your suggestion will be very helpful.

Hi, now we just need to have one of these for vertical bars á la Prusa i3 and others. Now that really would be spectacular!