foehnsturm
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Everything posted by foehnsturm
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I used that trick already. But the current print was intended as challenge for the the Machtless block and Race nozzle. Just wanted to see if this one performs better with Filaflex. And so far it looks like that.. -
... https://grabcad.com/library/human-spine-1 Geometry is not so much the challenge but using Filaflex which is one most difficult to print flexible filaments on bowden setups (and with a standard UM 2+ feeder).
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Never had a real one in my hands 8) But I assume, at little less flexible. I'll run another print with only 2 perimeter lines instead of 3, and even lower temp.
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Version 1.0
1,668 downloads
Like most people I found Filaflex very hard to print - until now Printed with the magnetic tool changer, 0.4 nozzle for HD Glass, 0.6 race nozzle & Machtless block for Filaflex -
That's true Btw where are you atm, Berlin?
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Well, most people fail completely to print the super-soft FilaFlex with the bowden setup. I'm sure I could go considerably faster but I want to keep temperature as low as possible cause dual extrusion needs working retraction.
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First test with HD Glass ( PETG) and Recreus FilaFlex. FilaFlex on a Machtless block with 0.6 mm race nozzle @ 30 mm/s, 0.15 mm layer height Not that bad. Considered it's FilaFlex, toolchange retractions worked surprisingly well.
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A Differnet approach to cooling fans
foehnsturm replied to bob-hepple's topic in Third party products & modifications
And this is the old / other stuff: https://ultimaker.com/en/community/3839-the-physics-of-cooling?page=1 https://ultimaker.com/en/community/4890-the-crossflow-fan-approach -
PIB polybenzimidazole Isolator Coupler
foehnsturm replied to gudo's topic in Third party products & modifications
Great work! I assume this would fit in the extra head on this picture as well (the smallest cross section where everything has to pass through from top to bottom is 14x20 mm) ?
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Ok, don't want to put too much stress on Tinkergnome. (But he should be well rested anyway )
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That's what I had in mind as well.
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Afaik a gcode for setting e-steps would be required with every tool change at the moment. But I pass this to @Tinkergnome I agree, using a different, probably already existing feeder is a nice option especially for tinkerers. However, professional users will most likely want to run identical drive trains.
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Polysupport is really super-easy to print with. The tip of the helix is 1.0 mm in diameter. Cura 2.1.2 with 0.15 mm layer. If there's any possibility to reach all the support structures for (easy) removal this will be my first choice from now on.
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Not sure why Cura (and btw S3D as well) generates this support on top of the wings. But at least we now know that Polysupport bonds very well to PLA.
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Coupling and extra print head for dual extrusion now approaching pre-production state.
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Ultimaker 2+ doing dual extrusion
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@DidierKlein, now I remember. Yeah, it would be great if you can do a first test.
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First try with GreenTec PLA and Polysupport. Temp for GreenTec was way too high for good overhangs (205 °C), I will do another one
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The approach uses an identical 2nd drive train for the additional head. Right now this is the UM2+ extrusion upgrade. Adaption to UMOs would be possible but requires considerable modifications. And of course there's an enhanced UM2 firmware which takes care of the tool changing and wiping processes and all the settings and adjustments.
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I heard Ulticreatr uses a brute force approach with tons of heating power and tons of cooling to reduce the typical issues,. Now idea how well that works and what the drawbacks are. The tool changer (my project) is a very well working solution with the extra benefit that it doesn't require any modifications to the standard print head. Single extrusion operation just remains the same. It will be available within this year in some way or other (best case would be a complete upgrade kit).
