Hi!
I’ll try to keep this short. Can anybody tell me what happened here? The print ran smoothly all the way, but on the last layer (as far as I can see it is only the last layer, MAYBE the 2 last ones.) this happened:
What can cause this? Thank you!
Looks like your Extruder is suddenly overheating.
Thank you for replying!
Is that a regular problem with these printers? I haven’t noticed any change in the temperature curve, but I didn’t watch the print at the last layer either. Why can it suddenly overheat?
I’m printing PLA at 195 degrees, which seems to be working well through the entire print. Other (larger) prints finishes well. I can’t find any reference to any temperature change in the G-code.
I can’t tell from the photo - how big is the part?
The part is 100mm in diameter. It’s this part: thingiverse.com/thing:140651/#files printed 1:1 from the STL file…
Check the wiring to the thermistor on the extruder.
Also check the screw that holds it.
My guess is that when it got up to the top layer the thermistor came out of the hole on the heater block.
The thermistor was not reporting the correct temp (cooler) and turned the heater back on and made it to hot.
See that big step a couple of mm’s down from the top - that’s where something happened that threw the rest of the print out. Is the opposite side of the print sticking out?
I has I similar problem with a print I did with one version of slic3r (not the latest think it was 10.1?) where it would print layers at the same height. In other words it printed one layer and then the next without a Z lift. It did this at the same point every time where it worked fine on the other versions of slic3r (same STL). Maybe yours is doing the same, it get to about 10mm height and then just stops moving the Z motor. For me this was a G code issue as my printer was working fine on other prints and it didn’t make it better if I re sliced it with different layer heights or other setting.
Maybe try a different version of slic3r or watch the print next time and see if the Z motor is lifting when it gets to that point or a different STL version of the gear?
I hate it when a large print fails near the end, all that wasted ink!
Sorry for my late reply.
Thank you for all your suggestions! I actually have no idea what happened. It’s not the thermistor, it sits firmly in it’s spot. I’ve double checked with an infrared thermometer and it’s just a few degrees off that I now correct by setting the temp in Slic3r a little lower. The Z-axis is lifting correctly, and have no issues all the way to the top. I guess I just was unlucky with that print.
I tried the print one more time, and the second one completed without any issues. Later I’ve printed a new Z-axis holder I found here in the forum, and now the print quality is much better.
Anyways, thank you for taking the time to reply!
Thanks for your reply, but the piece of sh… STUPID printer is sold and long gone.