Quantity of filament in a spool of PC CF
 
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Quantity of filament in a spool of PC CF  

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RicRav
(@ricrav)
Eminent Member
Quantity of filament in a spool of PC CF

You don't declare how long is the filament in both PC and PC CF spool, but based on declared weight and density, it's an easy computation:

PC: density 1,22 g/cm3 - weight 975 g --> 795 cm3 / 330 m of filament

PC CF: density 1,16 g/cm3 - weight 800 g --> 689,66 cm3 / 286,73 m of filament

While PC blend seems correct, as 330 meters is the value that Prusament spools can contain, I find quite strange that you are reducing so much the available filament for Carbon Fiber version, for no evident reason.

Are you (Prusa) sure that declared values are correct, including the density of 1,16 g/cm3 in the technical data sheet?

Has someone tried it already and can confirm the much shorter length of this filament? 15% less filament should be very evident just opening the spool.

Thanks a lot for the clarification.

Posted : 10/06/2021 7:42 pm
John
 John
(@john-6)
Reputable Member
RE: Quantity of filament in a spool of PC CF

I was told, when I asked this question in live chat it is the same length as PLA  that is 330m. This makes sense as the spool looks the same as PLA but your calcs are interesting. 

i3 Mk3 [aug 2018] upgrade>>> i3MK3/S+[Dec 2023]

Posted : 10/06/2021 9:51 pm
Swiss_Cheese
(@swiss_cheese)
Noble Member
RE: Quantity of filament in a spool of PC CF

Wouldn't it depend on density of the material? i must confess, I've become complacent relative to this, and in light of the increases in material costs, I've simply accepted it and looked for the less costly material. however I have also had to consider quality this has made a difference relative to cost and how much I have received, I defiantly don't what to pay to much.

 

I like the way your making me think, again about this

 

Swiss_Cheese

The Filament Whisperer

Posted : 11/06/2021 11:53 pm
RicRav
(@ricrav)
Eminent Member
Topic starter answered:
RE: Quantity of filament in a spool of PC CF

Swiss_Cheese, cost of PCCF is quite higher than PC blend. Being 3x expensive, of course, it's not meant to be a replacement for PLA for everyday prints, like action figures.

Based on previous data for prusament filaments on Prusa shop:

PC Blend: 49,37 €/litre + VAT

PCCF: 68,30 €/litre + VAT

For comparison: PLA: 24,33 €/litre + VAT

Each one has to decide, based on his specific application, if it's worthwhile or not. 

e.g. I have an application that requires some heat resistance (ASA/ABS is enough). A material that doesn't warp would be very appreciated, being big items, but with ASA I can print them for less the half the money, even if sometimes I get some warping and something has to be done again, it's still worthwhile using ASA.

What I find more unpleasant is the  shorter spool, that means more interrupted prints, spool replacements, wasted final meters, etc.

Posted : 15/06/2021 7:26 am
John
 John
(@john-6)
Reputable Member
RE: Quantity of filament in a spool of PC CF

if it performs as well as touted then easily worth the price of entry

i3 Mk3 [aug 2018] upgrade>>> i3MK3/S+[Dec 2023]

Posted : 15/06/2021 7:37 am
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