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SoliForum - 3D Printing Community → Help/Repair/Maintenance → Infill issues - What causes this?
Seems to function well enough for a little while then the infill goes to hell then some time after that the perimeter layers also die horribly.
Infill is set at .15 and it's speed here was at 50 mm/s.
I had this problem with a bad roll of PLA. For close to half the roll, I would get intermittant spots that would fail the print and I thought it was just me not dialing in the temperature. Then 3 nasty clogs in a row. The second half of the roll would have kinks and spots in the filament with bad diameters. And while trying to print at speed, the friction in the PTFE tube was too much and I would end up with exactly what you have in your picture.
My suggestion, try another roll really quickly to see if the problem goes away, then you know the source of the problem.
If it's starting ok but falling apart after some time I'd be looking at anything that involves heat.
Looks from the photo like it's madly underextruding. A list of ideas spring to mind to check:
* Extruder temp (might be too low - is this the same for different filaments? Is this an odd one?)
* Extruder driver chip flaking out
* Extruder motor flaking out
* Extruder vref not quite right
* Extruder gear loose on motor shaft
* Extruder gear clogged with powder
* Driver board over temperature in general (consider desk-fan cooling for a print to see if that helps)
* Partial/intermittent clog (some burnt stuff stuck somewhere in the nozzle/barrel)
Make sure you let us know how this investigation goes, looks like a bit of a different problem (maybe just a strange symptom of one of the common ones too, but still!)
Right! Shame this rolls my last roll at the moment... Guess I'll try the stuff Solidoodle sent with the printer.
I can rule out Extruder Temp, Grob
Been keeping an eye on the temp graph each print, nothing weird since I replaced the stock bits and pieces.
I think I might also be able to rule out a clog, had the thing sitting in Acetone over the weekend and have gotten anything I could out with a guitar string.
Also keeping the gear clean with a brush whenever it looks a little too dusty.
How would one check for a loose gear?
I think the motors fine, it can sit and extrude perfectly fine when there is no filament quite happily.
Testing!
Still no joy.
Swapped over to a laptop just to check if it wasn't a software problem, still have similar issues.
I'm now leaning towards a dying stepper motor but as per usual I'm not quite sure..
I have ended up with something like this a few times before. Once the infill extrusion width was just too thin within the software (it thinner than my layer height), and the rest of the times have been a partial clog. Poking it with a wire would help, but only for the first few layers or until flow was constricted again. Your perimeters look fine, so I'd make sure you check the infill extrusion width first.
I have ended up with something like this a few times before. Once the infill extrusion width was just too thin within the software (it thinner than my layer height), and the rest of the times have been a partial clog. Poking it with a wire would help, but only for the first few layers or until flow was constricted again. Your perimeters look fine, so I'd make sure you check the infill extrusion width first.
Thanks for that!
I think it may have actually worked, though counter to what you said it was even worse higher than .42 in the advanced settings.
Seems to work ok at .28
Cheers guys, I shall report back when I hit more snags.
So if I were to replace the motor of the extruder, would getting a NEMA 17 be the idea?
Or is that the wrong size?
So if I were to replace the motor of the extruder, would getting a NEMA 17 be the idea?
Or is that the wrong size?
NEMA-17 is correct SM42HT33-1334A
You might seriously consider the Bulldog or the Bulldog XL. I have been very happy with the XL.
http://www.reprapdiscount.com/search?co … rch=Search
It's worth the extra money.
Why are you replacing your current motor?
I'll definitely get a bulldog in the future, but in the meantime I just want to replace the motor to get the damn thing working properly again.
As it turns out, the fault(s) was in essentially all the cables that run from the extruder motor to the board, seemingly in several places along the length of said cables.
Plan is to replace them all, get it working again when the E3D arrives, finish the few big Halo projects I was working on then save up for the OrdBot. Multiple Bulldogs will happen some time in that time period.
Cool, sounds like you have a plan. Those electrical gremlins can be a pain to find.
Yeah, this one took far too damn long to locate... Like those intermittent faults that only show up when one isn't looking. >.<
Solidoodle wires are really crappy. I've had two, and perhaps now a third (new random problem) wire break down. They're just not quality multistrand. Worth replacing all of the extruder-head wires with some nice flexible ones from hobbyking or elsewhere if you are up for it in general.
SoliForum - 3D Printing Community → Help/Repair/Maintenance → Infill issues - What causes this?
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