1

Hi

Got my free K8200 running but the print of marvin lacks the keychain part

Pics of Marvin: http://imgur.com/a/HgNC6

Screenshot of Cura settings: http://imgur.com/a/I2tHT

Any advice on how to improve the print will very much welcomed.

2

Hi @Boelle, one trick is to print more than one at once, this allows the layer to cool on the “other” one and can make the keychain part easier to achieve.

3

@cobnut, you dont see any obvious stuff in the cura settings? i have retract off for now and maybe that could be it. The reason for it being off is that i have yet to find a good starting number

4

I’d certainly drop the print speed down and turn the fan all the way up. This is PLA I presume from your other settings? You should certainly use some retraction, maybe start at 1mm? So:

#1 - Print more than one at the same time

#2 - Turn the fan up to the max

#3 - Print more slowly

#4 - Use some retraction.

Rather than waiting for the whole Marvin, if you’ve got some 3D modelling software I might be inclined to cut him in half across his middle so you can do test prints more quickly.

5

@cobnut,

will try this, but first i want to dry out my filament

yes the imugr link to settings are for PLA

6

Assuming this is PLA (or something similar), here is what I would recommend.

1. Crank up your fan speed! If not at max, really push your fan to the limit. Marvin has some interesting overhangs, that require extremely high fan speeds to accomplish well.

2. Use your retraction! Cura offers some default retraction settings, and you can use those at a starting point. Later on, you can tweak those to your liking. Retraction will definitely help with some of your stringing and drooping.

3. Slow down? Lessening your speed will help with some problems, as the printer will generally be more accurate on the smaller details. However, this can create some cooling/overheating issues, so be cautious!

4. Lower your layer height? I see that you didn’t have a layer height set in your settings. Because I don’t know what layer height you are printing at, I can’t really recommend anything here… However, a large layer height can create large “lines” like the ones you can see on the top of Marvin’s head. Simply lowering your layer height a bit can certainly help here. In general, 200 microns is a good starting point.

I hope this helps! 3D Printing can be very experimental, as it varies greatly depending on your printer. I also saw that printing multiple Marvins at a time was suggested, as this can help with the retraction and cooling issues you were dealing with. This sounds like a great idea to me, and I would recommend this as well.

Good luck!

Jackson

7

“4. Lower your layer height? I”

i do have… the debian version just have a “fart” build in that means it will not alway display the number, but its set to 0.3 so far until i can tweak things

Right now i’m print fan ducts so it can concentrate the air on where i’m printing and not the whole bed and nozzle

8

fixed the fan and now starting from scratch

first layer @ 0.3mm

http://imgur.com/a/qXMWv

will do a singe width wall cube thing next to make sure it does not under or over extrude and that thin walls are uniform

it was a 40*40*40 hollow cube, uniform height at all 4 corners 39,3mm and 39,7 on all 4 sides

so it barely its just barely up to spec on the 4 sides, i will see what is the causes of the height missing a bit… maybe due to missing top layer

9

todays tweaking ended up with this:

http://imgur.com/a/hjyZb

a tiny amount of stringing and the keychain part not even thick

i guess 2 things

1)a bit of under extrusion

2) not enough retract

@Jackson277

@cobnut

am i right on this?