Foamy Print - Meh!
Foamy Print - Meh!
OK, so I switched out my clear PLA for black PLA. As soon as I switched it out, I started getting bad prints. I spent several days playing with the setting trying to figure it out thinking that maybe it was dye, or the diameters were too small/big, etc. Every print was horrible. Infill was foamy, perimeters delaminating, etc. After determining that I had wasted waaaay too much time thinking it was the settings, I decided to go back to clear PLA and see if it still occured. Sure enough, it did. So it was a mechanical issue somewhere. Based on the patterns I was seeing, I concluded it had to be something with the extruder. Turns out I was right. One of the screws holding the big red lever in wasn't tightened very well and there was slippage in the bearing to the point where the gear couldn't get consistent traction. After taking it apart and putting it back together, viola! Perfect prints again.
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Jimustanguitar
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Re: Foamy Print - Meh!
Yep, that sort of thing is usually a mechanical impedance to extruding like normal.
This was a partial jam caused by a bad chunk of filament that didn't melt like the rest of the spool.
[img]http://i.imgur.com/bvdB5Qa.png[/img]
This was a partial jam caused by a bad chunk of filament that didn't melt like the rest of the spool.
[img]http://i.imgur.com/bvdB5Qa.png[/img]
Re: Foamy Print - Meh!
I just had the exact same problem.
Mine turned out to be an issue with the filament. (not conclusive yet, i have changed the filament and it does not exhibit the same behaviour).
For some reason the filament was not moving freely in the bowden tube. The way you can test this is that you manually move the filament in the bowden tube using the screwy thingy on the motor.
I measured the filament and it was 1.66mm, so it was not too thick.
The filament was experimental, so there is no one to blame in this case, but if this was the case with store bought filament, i would not be really happy at the moment.
I watched the print, and it was initially happening at one part of the print (probably due to the twists and turns of the tube). Later on i could see it in the whole top part of the print.
In the attached image you can see it starting on the right side.
Mine turned out to be an issue with the filament. (not conclusive yet, i have changed the filament and it does not exhibit the same behaviour).
For some reason the filament was not moving freely in the bowden tube. The way you can test this is that you manually move the filament in the bowden tube using the screwy thingy on the motor.
I measured the filament and it was 1.66mm, so it was not too thick.
The filament was experimental, so there is no one to blame in this case, but if this was the case with store bought filament, i would not be really happy at the moment.
I watched the print, and it was initially happening at one part of the print (probably due to the twists and turns of the tube). Later on i could see it in the whole top part of the print.
In the attached image you can see it starting on the right side.
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Re: Foamy Print - Meh!
My new challenge is dealing with what appear to be burned blobs. I'm using Clear PLA and out of the blue, it will decide to place a really large big burntish blob on my print. I'm printing at 0.35mm/200c. If I go cooler, it tends to not adhere well. So what I think is happening is 200 is just too hot and maybe run it 10c less and set the max rate on the fan to like 75% instead of 100 so that it stays hot enough to do the trick. Not accustomed to the 0.35mm nozzle yet. I wonder if ABS will work better with it. Fun times. I just ordered some Wood filament so that should be interesting!