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17 votes
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Which is the difference between MK6 and MK8 and even MK10?

All credits for the following go to user "vermon" who posted in this thread. The following is a heavily amended version from his longer answer there. Makerbot did start its hotend series using MK as ...
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15 votes
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How to identify nozzle wear

I believe the little experiment made by E3D - the same link you provide - answers your question very well. Several points about wear can be found in this article. After printing only 250 grams of ...
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15 votes
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Why is it conventional to set line width > nozzle diameter?

There are several things at play that can make a wider line nice to have: First layer adhesion Due to some filaments having serious struggle to get the first line or layer stuck to the bed, it can be ...
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14 votes
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Will I see a noticeable difference switching from a .4mm to a .3mm nozzle?

1) Smaller nozzle advantage: sharper "corners" (higher X and Y resolution) 2) Larger nozzle advantage: faster 3d printing (because you can print the shell faster as each perimeter can be thicker so ...
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14 votes
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Slicer line width vs. extrusion multiplier for layer adhesion?

Generally speaking, both settings result in the same1: The feed rate of the filament gets adjusted. Either you set a general multiplier, or you demand a wider line which does make it set a higher ...
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11 votes

Why is it conventional to set line width > nozzle diameter?

Shouldn't a 0.4 mm nozzle create a line of plastic 0.4 mm wide Not necessarily. Due to a phenomenon known as die swell extruding plastic through a 0.4 mm nozzle, the line of plastic ...
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9 votes

How close should the nozzle be to the substrate?

This photo isn't exact, but may help Edit: Whoops! Forgot to include source. This is from the Wanhao User Manual/Build Guide. I can't quite find the webpage at the moment.
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8 votes
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Is there any reason *not* to use a steel nozzle for printing all materials?

Thermal conductivity of brass is approximately twice as better than steel (not stainless). Given that the size of nozzle is relatively small, it should be able to transfer enough heat for a medium-...
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8 votes

Ultimaker Layer Resolution vs Nozzle Size

You need a certain minimum flow rate to achieve consistent extrusion. Flow rate is the product of print speed, extrusion width (proportional to nozzle size) and print speed. If you use a very small ...
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8 votes

How to identify nozzle wear

One of the things I look for is if you pull the print head a good ways off the bed and have it extrude. It should just squirt plastic straight down. If it bends sharply in one direction, or even ...
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8 votes
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When should I replace the nozzle on my printer?

Replacing the nozzle depends on many things, the nozzle material (copper/brass, steel, hardened steel, Olsson Ruby Nozzle), the type of filament you print, how frequently you use the 3D printer. To ...
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7 votes
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How thin can my extrusion be from a 1.2mm extruder?

The main issue with very narrow extrusion widths (less than the nozzle size) is that you get really poor "nozzle squash." The plastic isn't pressed down very hard as it's extruded. That causes poor ...
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7 votes
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If I have a nozzle clog, can I easily get rid of it by simply replacing the nozzle?

The nozzle on a Prusa i3, if a genuine Prusa, would be part of the E3Dv6 assembly and is removable. It's wise to heat the nozzle to 150°C or higher, and handle with the care necessary for something ...
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  • 9,847
6 votes
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How close should the nozzle be to the substrate?

Traditionally, using a piece of paper (about 0.004" thick) gets you close to your appropriate standoff. However, if you adjust your layer thickness, your standoff should reflect this. Ideally, you ...
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  • 6,214
6 votes
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Hot end jamming very quickly

You are suffering from what is called "heat creep". Molten filament is creeping up the heat break and into the bowden tube, where it is causing a jam. You need to install a proper radiator block that ...
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6 votes

I found a filament that can be used for really precise FDM printing, Who could I hire to create a custom nozzle for it

You won't need specialized nozzles, you understand the material wrong: The benefit the properties of this material grant is not super fine prints (which you can get with small nozzles like 0.1 mm ...
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6 votes
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Wear resistant nozzles

E3D have a blog post on the subject of hardened nozzles. The common abrasive materials are carbon fibre, wood impregnated filament (or any other particulate fill), and some pigments. The blog ...
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6 votes
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Tevo Michelangelo nozzle below build plate?

Just move the Z-endstop up a little higher, also make sure the bed leveling screws are not completely screwed in. So: Move the head of the printer up. Move up the Z-endstop so that the nozzle is a ...
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6 votes
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What is the functional difference between an e3D-Style nozzle, Makerbot MK8 and M6 Chinesium Nozzles?

Differentiation The main differences between the e3D-Nozzle family and the "simple" Nozzle are the wrench size, body length and thread length of the nozzle. In fact, I have come across 2 different "...
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6 votes
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Is there an engineering/physics foundation for application of airbrush nozzles?

An obvious drawback is the lack of a flat surface around the opening, resulting in a severe limitation of the extrusion width to exactly the nozzle width (plus some percent). This nozzle cannot ...
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  • 3,786
5 votes
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Teflon tubing in nozzle throat coming out?

It looks like you got too tight nozzle, too cold hotend or extruding speed is too high (all could be in the same time of course). As filament goes into the teflon tube (coldend) and then into hotend ...
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  • 3,438
5 votes

What happens when I print a 0,6mm thick wall with a 0,4mm diameter nozzle?

I'd say you should experiment with Slic3r it can manage extrusion in very sophisticated way it can overextrude if you need a line wider than actual nozzle size as same as it can underextrude if ...
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  • 3,438
5 votes
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Prusa I3 - Burn marks on print

I have seen this after I reassemble the extruder heat block and then leave it too loose during the print. Is your extruder above the nozzle coated in a brown or black film? What happens is the ...
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5 votes

Geeetech Prusa i3 Extruder seems to push more filament, gear slips/skips?

A nozzle with a nozzle width of 0.3 mm cannot print a 0.3 mm layer height. You could do that but you should not as you ultimately pay the price in the form of a less aesthetic finish. The general rule ...
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5 votes

Can the filament tube be outside of the nozzle?

Let me clean up a little nomenclature The PTFE tube is either a Bowden Style Setup delivering the filament from the extruder down through the cool-end and to the heatbreak or just a liner in the cool-...
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5 votes

Can leaving the nozzle at 160 °C continuously on in between prints affect the viscosity of the prints?

PLA starts to change its properties at above its glass transition temperature of 60-65 °C, if stored there too long. Keeping it at 160°C, close to the melting temperature (173-178 °C) can ...
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5 votes

Which nozzle should I buy for Anycubic i3 Mega?

According to Anycubic this printer uses the E3D V5 type hotend as can be seen from the linked video of the AnyCubic Mega: The brass nozzle you see is fully compatible with the E3D v6 nozzle and can ...
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  • 30.6k
5 votes
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What does nozzle size affect besides line width in, e.g., Ultimaker Cura?

Searching the CuraEngine source, the only places I can find where nozzle size is used directly involve some arcane logic for merging of infill lines, such as: https://github.com/Ultimaker/CuraEngine/...
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5 votes

What is the purpose behind a glass nozzle?

Ceramic I can understand - very strong, great thermal range capability. Glass not so much - you'd need some seriously careful annealing at least. In either case the material is much harder than ...
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5 votes
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What is the purpose behind a glass nozzle?

First off, this is not a glass nozzle, it is a whole hotend design. A super simplistic one. Glass is, like ceramics, not a good thermal conductor but has a quite good thermal resistance - it only ...
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