Material for replacement parts
The MK3 is my first printer and though I have not yet had a chance to build it, I'll be looking to update to revision 2 parts fairly quickly. However, I haven't been able to find A) a brand of PETG that seems consistently recommended or B) a PETG that I liked the look of.
As I was looking for different filament company recommendations, I came across Proto-pasta. Unfortunately they don't have PETG but they do have HTPLA which they actually recommend over PETG for printer parts. Here is the response I got when asking if they had PETG for printing printer parts.
We haven't released PETG, but HTPLA is much higher temperature capable anyway. I'd recommend it for printer parts over PETG. PETG is amorphous and has a sharp loss in stiffness at Tg (which is only marginally higher than that of PLA) while HTPLA is semi-crystalline. Heat treating (also known as annealing or crystallizing) semi-crystalline materials like HTPLA increasing crystalinity for maintained firmness past Tg. This should be done post print as melting resets the material to it's amorphous state. Put both materials in an oven at 100C or 200-225F and you'll see what I mean.
I don't have any reason to doubt them, but, can anyone comment on using HTPLA for replacement printer parts? They have some amazing looking filaments but if parts absolutely need to be made from PETG I'll have to keep looking.
Re: Material for replacement parts
never used that filament... the updated printer parts I have printed so far, have been PLA, I don't print exotic filaments and so far, my PLA part cooling duct is holding up well...
I believe Jo prusa has said all parts can be printed from PLA, in the past....
I expect there might be issues with the part cooling fan duct if it is PLA and you are printing a high temp filament with no part cooling fan running...
you could take a pla duct off in this instance...
HTPLA may do the trick!
good luck, 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
Re: Material for replacement parts
This is the orange PETG filament prusa uses.
https://shop.prusa3d.com/en/filament/218-prusa-orange-petg-filament-1kg.html
Hi, I'm Sean. I used to work on CNC machines.
I try to not make mistakes, but the decision is YOURS.
Please feel free to donate to my filament/maintance fund.
Re: Material for replacement parts
Thanks Joan, it's refreshing to hear that even plain PLA could do the trick.
Sean, unfortunately shipping to the US makes the Prusa orange prohibitively expensive.
Re: Material for replacement parts
Careful printing parts in PLA. It slowly deforms when under tension, see around 50 second mark where this is explained.
My MK3 Parts: [Bowden] [New Shoes] [TPU Micro Springs]
Re: Material for replacement parts
Thanks Joan, it's refreshing to hear that even plain PLA could do the trick.
Sean, unfortunately shipping to the US makes the Prusa orange prohibitively expensive.
One spool should last for dozens of parts for your printer. I'm American,and I plan on ordering that, along along with my powder coated bed,
The cost is high, but it's quality enough to run in a printer farm. For generic non printer parts, I agree about the price. I'm about to take the plunge for some 12$ free shipping stuff... I expect amazing results from it. /sarcasm
I generally print right now with pla+, and once my mk3 arrives, I plan on moving to abs, for quality prints. (Acetone smoothing)
Hi, I'm Sean. I used to work on CNC machines.
I try to not make mistakes, but the decision is YOURS.
Please feel free to donate to my filament/maintance fund.