foehnsturm
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Everything posted by foehnsturm
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No laser, I think it's not reliable enough regarding false alarms. This is the most annoying thing which makes the filament sensor useless as people will finally turn it off. Prusa as well as the Duet3D guys don't seem to be perfectly happy with the reliability. Rotary is the way to go but maybe a little different, bent filament can be a beast. For further information I've to ask for some patience. Anyway, most encoders offer a quadrature signal which is relatively easy to connect to the UM2 electronics. As @tomnagel mentioned the sensor originally planned for the UM3 was going to be connected via SPI port. This would be the first obstacle to overcome. And then there is the UM3 firmware ...
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Hi there, There might be an external plug&play flow sensor for the UM2+/3 feeders in the nearer future It will detect end of filament as well as grinding and should be capable of monitoring real flow percentage precisely enough for some other (fancy) ideas. Firmware development right now focuses on the UM2+ for obvious reasons. However it'd be very exciting to find a way to integrate this into UM3 printers.
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Hi Luciano, After downloading the Cura definition files from the Mark2 github, copying them into the proper location and restarting Cura you should find the Mark2 via the add printer menu in the "Other" section. -
It's a sudden change, right? Then I would either expect a slicer issue (unlikely) or some kind of of mechanical impact. As you already reasoned, a step loss or something similar would cause both extruders to shift. Weirdly enough it looks very much like the coupling issue you reported above. I'd push some kind of tiny wedges in the gap between the original head and the coupling to make it bombproof and then try again.
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Thanks, will fix tomorrow.
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Optimized Mark2 profile settings would be great! There's a lot of settings which could be fine tuned, like different motion settings for head 1 and head 2 (almost twice the mass). And yes, the calculated Cura default settings became notoriously slow over the past two years.
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Unfortunately not, it's an estimate based on the approx number of Mark2 boards sold. I wanted to do this map but it's hard to collect the data from most of the Mark2 users. I even suspect the majority isn't active forum posters.
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Well again, apologies for that. Files were correct until I found out that the aligning square pockets might wear out after some time and therefore made them deeper but obviously without adjusting the overall depth of the coupling. You were right but some 100 people did the Mark2 without reporting issues. So I didn't invest enough time for investigations (there's still a daytime job for making a living from )
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https://github.com/foehnsturm/Mark2/tree/master/cura-resources
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I stand corrected. Updated git files for head and coupling. Holes in the head now 2 mm deep and coupling plate 3.75 mm thick to achieve a 0.25 mm gap
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Hmm, there still should be a small gap (but it should work anyway). Will have to measure the step/stl. Up to my recent experience with the corexy magnet tool changer parts it's quite easy to insert the magnets deeper than intended with a little more force applied. The bottom of the pockets in the print head actually isn't that strong (printed by bridging).
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No no, I don't like prime towers at all
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The white looks underextruded, especially in the upper half. There are several possible reasons. Is the white filament oozing during idle times? Perhaps the printing temp is too low when the white starts to print after pausing. Do you use a prime tower?
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Just enter a rough estimate for the y offset and repeat the calibration print. Then you should have one of the y lines matching.
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Hi Ultimatum, Welcome to the Mark2 user group! The PSU might shut down with dual extrusion, if all heaters and steppers are switched on at the same time. There are power budget settings in the firmware to limit the wattage for the heaters and bed heater. I suggest using the forum search with "power budget".
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No way that I would have remembered such a thing ...
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... kommt darau an, ob Du das Mark2 expansion board hast (oder die Kabel selbst verlängert hast) und ob Du einen normalen oder einen Ultimaker Extended hast. Das ergibt die 4 möglichen Varianten der Firmware.
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Hi WiseOldOwl, Great to see you joining the bandwagon. For the short way to the Mark2 upgrade just visit magnetic-tool-changer.com. You will find all the instructions there.
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Habe das Modell normal als ganzes angelegt und dann mit einem booleschen Operator einfach "zersägt". Man kann die Trennfläche natürlich auch komplexer gestallten, um ggf. zu beeinflussen, wie der Slicer damit umgeht.
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Habs kurz mal ausprobiert. Einfaches Teil, ähnlich dem auf dem Bildschirmfoto, horizontal auseinander geschnitten (Ring und Zapfen), in Cura importiert und kombiniert. Es wird sowohl der Toplayer des Rings als auch der des Zapfens gebügelt.
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Keine Ahnung ob das geht, aber was passiert wenn man das Teil geeignet auf 2 stl Files / meshes aufteilt und in Cura wieder kombiniert?
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And the 9 extruders is his more recent work.
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So this leaves us with the question if there are unused i/o pins we can use to control a mosfet for the heater. We would need at least: one to control switching between 2nd and 3rd one pwm output for the 3rd heater optionally, one analog input for the temp sensor
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Yep, the board is for the steppers, additional heater and temp sensor he doesn't need. But as far as I can remember our discussion, finding a suitable and cheap way to control the additional the stepper driver was the biggest issue. But taking the prusa super switch board as an inspiration might work as well.
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Hey guys, Someone here who can translate Italian to English (and gets more meaning across as google translate)? Still want to add the 3rd extruder to Mark2. The only, but major problem with that is ofc electronics. Half a year back we already discussed the multiplexer idea but with no real result. This crazy guy now drives 9 extruders with his ?multiplexer? setup https://immaginaecrea.wordpress.com/2014/10/13/flusso-canalizzatore-a-4-vie-la-stampa-3d-a-4-colori-e-gia-realta-per-lambiente-reprap-prima-parte/ And his results are just awesome
