Weak prints with smaller nozzle

Hello everyone,
I have just upgraded to e3d v6 hotend. Everything is perfect with 0.4mm nozzle (0.3mm layer height), but when I change nozzle to 0.25mm with 0.2 mm layer height, prints become very fragile with poor adhesion between the layers. What could be the issue and what parameters i should change to get stronger prints? Thanks

I gues you have to degrease the printspeed for about 25 - 30 %.
It’s try and error.

I think .2mm layer height is too big for a .25mm nozzle. I would try 0.15 or even 0.1

reprap.org/wiki/Triffid_Hunter’s … tion_Guide

[quote]Best results are obtained when layer height < 80% of nozzle diameter, and extrusion width >= nozzle diameter.
Eg; with an 0.35 nozzle, your maximum layer height is 0.35*0.8= 0.28mm and your extrusion width should be 0.4mm or greater. with an 0.5mm nozzle, your layer height can be up to 0.4mm, and an 0.25mm nozzle will give you 0.2mm max layer height.[/quote]

I have a 0.5mm nozzle and this does seem to hold true. I can print ok up to 0.3mm layer height but if I go to 0.5mm layer height I get some flimsy prints.

Hi - I’m having similar issues , E3D V6 hotend, 0.4mm nozzle working great at .20 & .25 layer height
BUT - 0.6mm nozzle, prints are really weak. I printed a cover to a box that included some cylinders w/center holes and I broke the cylinder right off with barely Any effort whatsoever! I was using a layer height of .20 just to see how clean it could be with a 0.6mm nozzle.

• Am I way off with that and HAVE to use a higher layer height? 0.60 x 0.80 = < 0.48 so like 0.35???
• I also had layer width @ 0.6 to match the nozzle size - should that be higher?
• Can speed be a big factor in this? I figured bigger nozzle, faster prints. Should I scale my 3000mm/s by say 0.4/0.6 = 67% which would be around 2000 mm/s?

I also have the volcano nozzle, BUT haven’t assembled or tried. Any experience on what the optimal nozzle sizes are for the
A) E3D v6
vs
b) Volcano Nozzle?

I appreciate any experience on this!

Hy,
with E3D V6, I try for now 0.6, 0.4 and 0.3 nozzles.
Nozzle 0.6 -> used for fast prints with a lot of post production with 0.5mm layer height, maybe for this kind of printing, Volcano is very usefull.

Nozzle 0.4 -> 0,3mm for fast prints, 0,2mm for normal prints and 0,1mm for high definition. I tried 0.08mm it’s also ok, and under this value I had bad prints. I like to print in 0.2mm because it gives a good rate time/quality.

Nozzle 0.3 -> 0.2mm and 0.1mm, very good results, and I print very smal things with 0,05mm, I didn’t try under this value because of the long time needed and not usefull for me.
I use this noozle for smal and detailed parts.

Hope this little knowledge will help you

[quote=“Tag”]Hy,
with E3D V6, I try for now 0.6, 0.4 and 0.3 nozzles.
Nozzle 0.6 -> used for fast prints with a lot of post production with 0.5mm layer height, maybe for this kind of printing, Volcano is very usefull.

Nozzle 0.4 -> 0,3mm for fast prints, 0,2mm for normal prints and 0,1mm for high definition. I tried 0.08mm it’s also ok, and under this value I had bad prints. I like to print in 0.2mm because it gives a good rate time/quality.

Nozzle 0.3 -> 0.2mm and 0.1mm, very good results, and I print very smal things with 0,05mm, I didn’t try under this value because of the long time needed and not usefull for me.
I use this noozle for smal and detailed parts.

Hope this little knowledge will help you[/quote]

Yeah - I’ve been seeing the same connection of speed vs quality, etc. I know there are also the limits to the nozzle and the machine itself of course. But for the money, this is an awesome machine!