0.7mm to 0.3mm nozzle i just want to change my 0.7mm nozzle to 0.3mm nozzle , anyone know can just change the nozzle like that? https://reprap.org/forum/read.php?1,232527,232527#msg-232527 Sat, 10 Oct 2026 00:39:53 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,232527,234267#msg-234267 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,234267#msg-234267 jamesdanielv General Fri, 09 Aug 2013 17:15:33 -0400 https://reprap.org/forum/read.php?1,232527,234174#msg-234174 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,234174#msg-234174
got one problem with the print today, i was printing a gear and it has a boss head around 10mm on top of the gear with a center hole through it (about 5mm i think), but at the final phase of the print the boss head seem like collapsing/melting on it self (filament too hot???), my nozzle is 0.7mm and using 3mm pla, what is wrong here?]]> Anonymous User General Fri, 09 Aug 2013 10:37:34 -0400 https://reprap.org/forum/read.php?1,232527,233059#msg-233059 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,233059#msg-233059 -------------------------------------------------------
> There is definitely a trade off between speed and
> quality. That's why I have different size nozzles
> to change out, depending on what resolution I
> need. As for 3mm vs 1.75mm, there is no a trade
> off. IMHO 1.75mm is hands down better. Plus, If
> you really wanted to, you could build your own
> lyman extruder and make all the filament you want.
> I hope granule printers will come mainstream one
> day. That will be the next generation of the
> reprap project probably.


i think what you'll see is more of a hybrid between filament extruders and granule to print extruder,]]> thejollygrimreaper General Mon, 05 Aug 2013 18:58:14 -0400 https://reprap.org/forum/read.php?1,232527,233055#msg-233055 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,233055#msg-233055 -------------------------------------------------------
> 3d2013 Wrote:
> --------------------------------------------------
> -----
> > i just want to change my 0.7mm nozzle to 0.3mm
> > nozzle , anyone know can just change the nozzle
> > like that?
>
> All that you have to do is adjust your slicer
> settings to match the smaller nozzle.
>
> Back pressure issues and comparisons is much ado
> about nothing. Smaller nozzles print smaller
> tracks at presumably smaller layer heights
> requiring much smaller flow rates. Comparing
> identical machines side by side a .4mm machine
> runs at higher print speed than its .5mm
> counterpart. Mind you the .5mm machine finishes
> the print faster because the larger nozzle covers
> more area.
> Just to mention: Unless you are contemplating
> making miniatures a .3mm nozzle is going to take
> forever to complete a print.
>
>
Quote
a, b and c is always going to be more
> reliable than d e and f because the it's going
> through the hot end faster
>
> :S I can run a full 5 lb. spool of 3mm ABS or PLA
> filament without a hiccup. How do you get more
> reliable than that?


a string of successful prints with a 5LB spool of 3mm is very small window of observation on an already tuned system you simply have a good hotend,there's not shortage of people who have experienced the same thing, a good hotend and a filament driving mechanism all of which can be proven just as unreliable under the proper testing,

from a fundamental point of view, when you start doing tests like lowest print speed, highest print speed, max retraction min retraction, force required to extrude at a given temperature,smallest nozzle size, from a purely fundamental and mathematical view 1.75mm beats 3mm in just about all cases,

1.75mm got a bad reputation early on because people were trying to put it through wades extruders designed for 3mm filament along with bad and lazy spool handling practices not to mention that the spools themselves were'nt that greatly wound either]]> thejollygrimreaper General Mon, 05 Aug 2013 18:48:34 -0400 https://reprap.org/forum/read.php?1,232527,233053#msg-233053 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,233053#msg-233053 Anonymous User General Mon, 05 Aug 2013 18:35:50 -0400 https://reprap.org/forum/read.php?1,232527,233047#msg-233047 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,233047#msg-233047 Anonymous User General Mon, 05 Aug 2013 18:03:14 -0400 https://reprap.org/forum/read.php?1,232527,232965#msg-232965 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232965#msg-232965 -------------------------------------------------------
> i just want to change my 0.7mm nozzle to 0.3mm
> nozzle , anyone know can just change the nozzle
> like that?

All that you have to do is adjust your slicer settings to match the smaller nozzle.

Back pressure issues and comparisons is much ado about nothing. Smaller nozzles print smaller tracks at presumably smaller layer heights requiring much smaller flow rates. Comparing identical machines side by side a .4mm machine runs at higher print speed than its .5mm counterpart. Mind you the .5mm machine finishes the print faster because the larger nozzle covers more area.
Just to mention: Unless you are contemplating making miniatures a .3mm nozzle is going to take forever to complete a print.

Quote
a, b and c is always going to be more reliable than d e and f because the it's going through the hot end faster

:S I can run a full 5 lb. spool of 3mm ABS or PLA filament without a hiccup. How do you get more reliable than that?]]> Bruce General Mon, 05 Aug 2013 13:23:54 -0400 https://reprap.org/forum/read.php?1,232527,232915#msg-232915 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232915#msg-232915 -------------------------------------------------------
> which one is better
> a- 1.75mm pla with 0.7mm nozzle
> b- 1.75mm pla with 0.4mm nozzle
> c- 1.75mm pla with 0.3mm nozzle
> d- 3mm pla with 0.7mm nozzle
> e- 3mm pla with 0.4mm nozzle
> f- 3mm pla with 0.3mm nozzle
> pls give the reason

with the limited information about your hotend ...
a,b and c is always going to be more reliable than d e and f because the it's going through the hotend faster but it's dependant on the hotend and about 50 other factors,]]> thejollygrimreaper General Mon, 05 Aug 2013 09:45:42 -0400 https://reprap.org/forum/read.php?1,232527,232888#msg-232888 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232888#msg-232888 a- 1.75mm pla with 0.7mm nozzle
b- 1.75mm pla with 0.4mm nozzle
c- 1.75mm pla with 0.3mm nozzle
d- 3mm pla with 0.7mm nozzle
e- 3mm pla with 0.4mm nozzle
f- 3mm pla with 0.3mm nozzle
pls give the reason]]> Anonymous User General Mon, 05 Aug 2013 07:57:04 -0400 https://reprap.org/forum/read.php?1,232527,232868#msg-232868 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232868#msg-232868 -------------------------------------------------------
> you also have to account for how long the oraface
> is, the shorter it is the faster you can push it
> out, but if its too short it might blow out.

generally the longer it is the more backpressure you have, typically most nozzles are around 0.5mm, the advantage in a longer orifice is that retraction doesn't have to be as long, it's a mechanism being explorerd for the direct granule to print hotends at the moment,]]> thejollygrimreaper General Mon, 05 Aug 2013 06:45:51 -0400 https://reprap.org/forum/read.php?1,232527,232859#msg-232859 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232859#msg-232859 aduy General Mon, 05 Aug 2013 06:27:18 -0400 https://reprap.org/forum/read.php?1,232527,232855#msg-232855 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232855#msg-232855 -------------------------------------------------------
>
Quote
jamesdanielv
> it is likely 4 to 16 times harder to push
> feedstock thru
>
> Where do those numbers come from? If the area of a
> .7mm circle divided by the area of a .3mm circle,
> is 5.44, shouldn't it be 5.44 times harder?

5.44 only takes the change in the opening into account, but not the increased speed of filament movement. Usually the resistance increases with speed, independent from the nozzle diameter.]]> Srek General Mon, 05 Aug 2013 06:20:46 -0400 https://reprap.org/forum/read.php?1,232527,232785#msg-232785 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232785#msg-232785 Anonymous User General Mon, 05 Aug 2013 00:40:47 -0400 https://reprap.org/forum/read.php?1,232527,232782#msg-232782 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232782#msg-232782 thejollygrimreaper General Mon, 05 Aug 2013 00:04:47 -0400 https://reprap.org/forum/read.php?1,232527,232770#msg-232770 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232770#msg-232770
Quote
jamesdanielv
it is likely 4 to 16 times harder to push feedstock thru
Where do those numbers come from? If the area of a .7mm circle divided by the area of a .3mm circle, is 5.44, shouldn't it be 5.44 times harder?]]> Anonymous User General Sun, 04 Aug 2013 23:15:30 -0400 https://reprap.org/forum/read.php?1,232527,232606#msg-232606 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232606#msg-232606 jamesdanielv General Sun, 04 Aug 2013 09:59:24 -0400 https://reprap.org/forum/read.php?1,232527,232534#msg-232534 Re: 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232534#msg-232534 thejollygrimreaper General Sun, 04 Aug 2013 03:34:49 -0400 https://reprap.org/forum/read.php?1,232527,232527#msg-232527 0.7mm to 0.3mm nozzle https://reprap.org/forum/read.php?1,232527,232527#msg-232527 Anonymous User General Sun, 04 Aug 2013 03:16:01 -0400