Prusa "Glow in the dark" filament
 
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giorgio.d
(@giorgio-d)
Active Member
Prusa "Glow in the dark" filament

Hello,
what nozzle is recommended for the "Glow in the dark" filament? The brass nozzle included in the kit can fit or is better to switch to a hardened one?

Thank you!

Giorgio

Opublikowany : 21/02/2017 11:28 am
JoanTabb
(@joantabb)
Veteran Member Moderator
Re: Prusa "Glow in the dark" filament

Glow in the dark filament is reputed to be more abrasive than standard filament, however i have run a couple of rolls through my brass nozzle, and not noticed any problems. nozzles are not particularly expensive.

I would be tempted to use the existing brass, and order a replacment, for later.

from the reports that I have seen, there is little performance difference between Brass and Hardened or stainless nozzles apart from the longer life of the alternate metals, I would probably get a stainless nozzle next unless I was planning on using a lot of abrasive filament.

as it is, I have a set of different sized brass and stainless nozzles, but so far, haven't bothered changing them, since I upgraded to Mk2

on the mk1 I used the smaller nozzles for fine detail but it increases the print time...
I now have two Mk2's one is due to have a multicolour upgrade and the other is going to be built as direct extrusion, so I may put a finer nozzle on the direct extrusion variant...

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Opublikowany : 21/02/2017 11:40 am
JoanTabb
(@joantabb)
Veteran Member Moderator
Re: Prusa "Glow in the dark" filament

Stainless steel is harder wearing than brass and cheaper than hardened steel

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Opublikowany : 21/02/2017 11:42 am
giorgio.d
(@giorgio-d)
Active Member
Topic starter answered:
Re: Prusa "Glow in the dark" filament

Thank you 😉

You dispelled my doubts

Opublikowany : 21/02/2017 11:46 am
giorgio.d
(@giorgio-d)
Active Member
Topic starter answered:
Re: Prusa "Glow in the dark" filament

Stainless steel is harder wearing than brass and cheaper than hardened steel

What's the big difference between the two, apart from the price?

Opublikowany : 21/02/2017 12:05 pm
Vojtěch Bubník
(@vojtech-bubnik)
Member Admin
Re: Prusa "Glow in the dark" filament

> Stainless steel is harder wearing than brass and cheaper than hardened steel

I believe the stainless steel has a significantly lower temp conductivity than the steel.

Opublikowany : 21/02/2017 12:21 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
Re: Prusa "Glow in the dark" filament

The thermal path is very short. does th higher thermal resistance cause any ill effect?
regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Opublikowany : 21/02/2017 2:01 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Prusa "Glow in the dark" filament

I have been testing the new plated copper nozzles. Have to say that they work very well.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Opublikowany : 21/02/2017 3:11 pm
jediknight0
(@jediknight0)
Active Member
Re: Prusa "Glow in the dark" filament

On my old printer (Robo R1), I used about a half a roll of Inland glow-in-the-dark PLA. That stuff just reamed out my brass nozzle. It was very, very obvious just looking at it. I had no idea about abrasive filaments at the time so it was quite a surprise. I switched to a hardened steel nozzle after that and didn't have the issue again.

I've heard that stainless steel nozzles don't do much for hardness. You have to have a hardened steel nozzle. Just stainless steel is mostly for printing food-safe plastics.

In a related note, I just received a solid tungsten nozzle today (from a Kickstarter I supported). I should be able to get on my mk2 this weekend. I'm excited.

Opublikowany : 22/02/2017 8:31 am
JeffJordan
(@jeffjordan)
Member Moderator
Re: Prusa "Glow in the dark" filament

searching for the perfect nozzle is like searching for the holy grail.

💡 there are several properties of the nozzle that you have to take in account when deciding to fit some in your hotend:
(1) first and most important is the thermal conductivity. it needs to be as high as possible so that the heat could be transferred to the filament as good as it gets.
(2) the thermal capacity, or better understandable: the amount of heat that can be "stored" inside the mass of the nozzle. if it's to low, the nozzle tends to cool down to quick. it will have influence to the pid tuning as well.
(3) the durability.

unfortunately, from the material scientific point of view, the properties couldn't all be optimized at the same time. so if you look for very hard materials, that ar highly durable, you loose the ability of thermal conductivity (and vice versa).

➡ so you'll always have to find a reasonable compromise for your use case... and for the most use cases a brass nozzle delivers the best trade-off.

dem inscheniör is' nix zu schwör...

Opublikowany : 22/02/2017 12:48 pm
giorgio.d
(@giorgio-d)
Active Member
Topic starter answered:
Re: Prusa "Glow in the dark" filament

searching for the perfect nozzle is like searching for the holy grail.

💡 there are several properties of the nozzle that you have to take in account when deciding to fit some in your hotend:
(1) first and most important is the thermal conductivity. it needs to be as high as possible so that the heat could be transferred to the filament as good as it gets.
(2) the thermal capacity, or better understandable: the amount of heat that can be "stored" inside the mass of the nozzle. if it's to low, the nozzle tends to cool down to quick. it will have influence to the pid tuning as well.
(3) the durability.

unfortunately, from the material scientific point of view, the properties couldn't all be optimized at the same time. so if you look for very hard materials, that ar highly durable, you loose the ability of thermal conductivity (and vice versa).

➡ so you'll always have to find a reasonable compromise for your use case... and for the most use cases a brass nozzle delivers the best trade-off.

Thank you JeffJordan, your comment is very exhaustive!

Opublikowany : 23/02/2017 12:06 am
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