Game time: Spot the difference

[taconite]

Hey guys,

I thought about a little game. Maybe I'm not the only one sitting at home under lock-down because of the elephant in the room. And maybe everyone will learn something from this aswell
rules:
I start posting pictures with 2 prints and asking what the difference in settings/adjustments/whatsoever is between the 2 prints. The first who gets it, can continue with posting (a) picture(s) by himself.

Thoughts?

1. Round:
   

#littlethingscanmakeahugedifference

[droftarts]

@taconite Fun! But if I get it right, I probably don't have two prints to compare... I print so little!
I reckon your one is temperature difference. Probably left is okay, but right is too cold (or maybe too hot as it's still stringy).

Ian

[jens55]

My vote is for reduced flow resulting in under extrusion

[mrehorstdmd]

You'll never get this (one unless you've been reading other threads...)

[droftarts]

@mrehorstdmd Top one designed by orangutan, bottom by a gorilla?

Ian

[jens55]

@mrehorstdmd said in Game time: Spot the difference:

You'll never get this (one unless you've been reading other threads...)

No fair, trick question as there is no printing difference.

[mrehorstdmd]

@jens55 Oh, but there is a huge printing difference...

[taconite]

so actually its non of the stated.
Yesterday I tried to print this model multiple times with different settings ... no changes. Over night I dried a smaller role of filament (same manufacuterer same filament) but no I get these good results ... so simply ... wet filament

[JamesM]

@mrehorstdmd

Lol...the difference is in the homing (I was reading your threads)

[jens55]

Exactly .... no difference in actual printing, only in homing.
Again "trick question and not fair"
The original question was fair though .....

[Phaedrux]

@taconite said in Game time: Spot the difference:

so simply ... wet filament

What material?

[droftarts]

@taconite Nice one. I need to get a food dehydrator to dry out all the PLA that’s been in my loft for the last few years! Is that what you used?

Ian

[Phaedrux]

@droftarts I've used a convection oven a few times. Just be careful with the temps. My oven doesn't go very low, so I heat it up and turn if off and heat it up and turn it off a few times over an hour or so. I use a remote meat thermometer to keep an eye on the temps.

[jens55]

I use a food dehydrator that controls the temperature. I also have an older one but it doesn't control temperature so I don't use it for drying filament.
Having said all that I find that moist filament is rare for PLA and PETG. I leave the spools on the machine when I am not printing. At least on PLA there is a situation where the filament gets extremely fragile in the section from the spool to the extruder so it's got to be treated careful or reloading is required. There is no difference in material once it's been melted. IMHO this phenomena is caused by exposure to air after getting micro fractures from un-spooling. I takes about a week of sitting before going fragile.

[taconite]

Filament was PETG. The thing is, that there is a quite high humidity in my basement. That's why I use a little pizza oven to dry my filament.

And I had a problem with to high temps aswell and because of that a role of filament fused together

[droftarts]

@taconite I Over heated and semi-melted a roll of PLA in a kitchen oven! Most was salvaged, but was brittle. I printed extruders out of it, but they kept breaking!

Ian

[A Former User]

is there sufficient airflow in those ovens to circulate the air out as it saturates with moisture from the filament?

[taconite]

@bearer hard to say ... there are some holes in the top of the door but when I dry filament I need to set the timer every hour, while doing that I open the door to let moisture escape

@droftarts yeah it gets very brittle. Once the filament strands were slightly melted together and I didn't notice it until the filament broke during printing.