Lets play ‘Name That FAILURE!’ #CheersAndApplause It’s a bowden support and it’s listing to the side…the head doesn’t appear to be catching, and I’m pretty sure the spools aren’t slipping on the shafts (tightening the screws further makes scary delamination sounds.) The motors are driven hard enough to be noisy, and the gcode looks good in Pleasant3D…likewise, the top of the print isn’t skewing…
Stepper drivers overheating?
I don’t know what’s more frustrating on prints like this…wasted time or wasted filament.
Gained experience.
@Bracken_Dawson could be, but I’ve seen it on other prints with active cooling blowing on the motors…dying Polulus?
@Tim_Sills it’s a lot closer to a successfuly print than a lot of my earlier attempts. Filament’s cheap enough.
What’s the temperature of your hot end? I had some similar looking problems when my nozzle was too hot.
Yeah, too hot and maybe a little more retraction if that doesn’t work. Probably heat.
@Evan_Gillespie The hairyness, or the seperate layers? I haven’t dialed in the retraction yet, due to earlier clogging problems…it’s the layer inconsistencies I’m most concerned about.
@Mike_Miller , if I’ve learned anything in my limited experience with 3D printing (on a Printrbot Jr- props @Brook_Drumm ) it’s that everything is interrelated. Tweak the easy stuff ie. nozzle temp and retraction, and the picture will become clearer to see whats causing the weird problems like your layer realignment.
Hairiness - Check you retraction and slicer settings. You might also be printing too hot. Could be the quality of your filament as well.
Lost steps - check current going to steppers, check if steppers are over heating, make sure everything glides mechanically, add a bit of z lift to your print settings.
For mid layer adhesion do you have a fan or air vent that could be causing unwanted cooling? Mid print curl on the corners is crazy to resolve and usually points to outside factors like air blowing or bad pockets of fill intent
I’ll attempt to direct more of the air to just cooling the motors… For this print it was blowng over pretty much everything.
@Mike_Miller The mid layer errors could be caused by plastic being too hot as well. Could be preventing the new layer from adhering properly. What temperature are you using with what filament?
May even be a partial clog of the nozzle and retract moves it up inside the nozzle letting it print freely for a while
Check your thermistor and heater connections. If either has intermittent connectivity you could get wild temperature swings which will stop extrusion followed by extrusion at too high of a temperature.
Sorry guys, I should have cleaned the part up so that only the failure I’m interested is obvious. The issue is the intra-layer shifting, NOT the retraction threads…one can be cleaned up, the other pretty much makes for a useless print.
Warping PLA extruder/x-carriage? It looks a bit too extreme to be that, but it’s not completely impossible. Otherwise there’s a few other possibilities; motors or drivers overheating due to overcurrent/insufficient cooling, motors missing steps due to undercurrent/too high acceleration/jerk, loose belts or loose pulleys. Make an ink mark across the shaft/pullley to check for slip. If that’s it, file a flat on the shaft where the grub screw sits.
I suspect it was an under-lubricated linear bearing.