hello everybody
when i’m printing a holow cube like
thingiverse.com/thing:19780
I always get plastic hanging down, what can I do about this?
thanx in advance
I’m having the same issues with http://www.thingiverse.com/thing:13170.
Pic here http://imgur.com/iS1HyAl
I am maybe looking into a better duct for my fan as perhaps its a cooling problem. Also I haven’t really examined whatsettings i can adjust. For the top, the cross hatching works OK, but the initial layer droops…
Are you using any kind of duct or additions to the cooling fans?
Will post here if cooling improvements help.
Try inceasing the speed for “Bridges” in Slic3r. http://manual.slic3r.org/Speed.html
Due this printing technology you have always a little hang down.
Another way is to print with “Support Material”. http://manual.slic3r.org/SupportMaterial.html
But after the print, you have to manually remove it per hand.
Maximum overhang length is 2,5 cm.
A trick is to cut the cube in half so you don’t have any overhang at all, and then glue the two pieces together with superglue.
Most 3D models avoid overhang through clever design.
It’s very hard to achieve a perfect bridge. The first layer is always sagging a bit but most of the time you just can cut it away.
You can improve your bridges with a few tricks :
- Increase the speed for the bridges (80 or even 90 mm/sec)
- Adjust the acceleration for bridges around 700 mm/s2
- In “advanced adjust” the Bridge flow ration to 0.6
- Use a good cooling (fan duct).
- Decrease the extruder temperature (180…185 vary with the brand and color of the filament).
You need to make several tests to see what works best for you.
The support option in Slice3r is seldom usable. The best way is to load the .stl file in OpenCad and design one or several custom thin support(s).
[quote=“raby”]It’s very hard to achieve a perfect bridge. The first layer is always sagging a bit but most of the time you just can cut it away.
You can improve your bridges with a few tricks :
- Increase the speed for the bridges (80 or even 90 mm/sec)
- Adjust the acceleration for bridges around 700 mm/s2
- In “advanced adjust” the Bridge flow ration to 0.6
- Use a good cooling (fan duct).
- Decrease the extruder temperature (180…185 vary with the brand and color of the filament).
You need to make several tests to see what works best for you.
The support option in Slice3r is seldom usable. The best way is to load the .stl file in OpenCad and design one or several custom thin support(s).[/quote]
Thank you for tip, i set is on the base of this numbers and print quility is almost perfect :D… Just might 1 question what about Extrusion Multiplier? How exactly this effect the quiallity of prints ? I have set it surrently on 0.98…
BTW where exactly is “cceleration for bridges” — could not found it 