chrisgr99
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Posts posted by chrisgr99
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I'm printing with TPU95 on a UM3 using the default settings in Cura.
The material oozes from the print head faster than it's being fed. The part has some small upward facing features and the oozing causes material to pile up in blobs when small the features are printed.
Has anyone else had this problem? Would lowering the print head temperature help? By how much?
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I'm printing with an Ultimaker 3 using PLA in Extruder 1 and PVA in Extruder 2. Both types of filament show as the same color (grey) in Cura 4.1 preview.
How can I make each filament a different color so they be distinguished? I looked in the Color Scheme menu and chose Material Color. Both extruders are checked.. The color indicators next to them are both orange. However there is no way to change the color and the color isn't used in the preview anyway.
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Can anyone recommend a good lead-free 0.4 mm nozzle/print head for UM3? It doesn't have to be abrasion resistant as it's mainly for PLA.
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It is pretty dry here. I'll try printing again at fine resolution without ever touch the machine while printing and see if I get a good print. It would be nice to print at fine resolution.
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1 hour ago, robinmdh said:
I've seen all kinds of shifts happen on the display, it is usually caused by a powerfull Electro static distcharge(ESD) but it can also be caused by constant EMC.
The fact that it happens every time is strongly indicative of nearby electrical disturbances, could be a microwave or anything that generates sparks, broken CLF tubes, that kind of stuff.
That same disturbance is also wreaking havoc on the communication channel between the real time controller(marlin/arduino) and the high level controller (griffin/olimex/linux) this lowers the potential throughput a lot, throughput required when printing more high-poly models but your EMC disturbance could make it problematic for even simple medium poly prints.
This can most likely not be fixed by firmware only more shielding. And any other 3d printers in that environment would quite possibly skip moves (not stop though, as most don't have error recovery on their read from serial or SD card).
I suggest moving the printer to a different room or building and seeing if the problem persists.
P.S: (the display would likely shift left to right or top to bottom and then wrap around so that the edges of the screen are now in the middle, not rotated).
I don't think I'm near any electrostatic discharging machines. It's in a quiet residential workshop.
The screen wrapping always happened at the same time as a pause so they must be related. The wrap would clear after minute or two (during the same print job) only to reappear on the next pause. Could it be that a complex model is overflowing the processor's memory which is corrupting the display? I also noticed when I aborted the problematic print job, the display was even more fractured than just being wrapped. I shut the machine down and restarted to clear it.
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Thanks everyone!
In my case it probably was that the model was too high poly . I tried importing it into Meshlab and it crashed Meshlab. It's a model I created in OnShape and exported in fine resolution. I exported in medium and coarse and they also crashed Meshlab! However a very similar fine resolution model has been successfully CNC milled by Protolabs
I then slightly simplified my model (removed some fillets), exported it at medium and loaded it into Cura. I changed the layer thickness from 0.1 to 0.15. It's now almost finished printing without a problem. I'm not sure which of the changes solved the problem.
I'm surprised even a coarse export of my model (as STL) would not import into Meshlab, considering that Meshlab is for simplifying and repairing models. My model is not really complex compared to some I've seen although it does have a few sub-mm features.
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I am also having this problem with my new UM3. I just updated the firmware and am using the most recent Cura with default settings.
The head pauses randomly every few minutes for 5 to 10 seconds and extrudes a small lump of material at that spot. My models are small with quite a few features but don't seem excessively complex.
I also notice that when the head pauses the display gets rotated horizontally so the right side is on the left and the left side on the right. The display corrects itself after a minute or two until another pause. Would a model being high poly cause this? It seems like a bug.
The first time I noticed the problem was when I switched to 0.1 layer height. Thicker layers had not shown the problem. Could this be the cause?
What settings can I tweak to try to eliminate this?
Ultimaker 3 - Look up How Many Hours of Usage
in UltiMaker 3D printers
Posted
I often see people referring to the number of hours their Ultimaker 3 has been used. Do they keep a log, or does the printer track this?
If the printer tracks it, where in the menu system is it possbile to find it?