Are you using Cura and your print times are inaccurate or are you seeing much
longer print time with Cura 4.2.1 well I tested it and I found there's one little
flaw that it's not reading a profile right but when that's correct I'm
getting accurate print times on small and large. I'll explain it all on today's
Filament Friday. Filament Friday is brought to you by these patreon
supporters. i want to compare print time so I'm going to use cura 4.0 and then
I'm going to use cura 4.2.1 and as a first model I'm gonna use my CHEP cube
at a 0.28 layer height and on 4.0 it says 22 minutes to print now in 4.2.1
all the same settings it says 32 minutes to print but when I actually printed
them look at the differences here and cura 4.0 remember is 22 minutes actual
print time was 31 minutes now in cura 4.2.1 which said 32 minutes the actual
print time was 33 minutes so really close in fact cura 4.2.1 estimated time
was real close to the cura 4.0 time so it looks like cura 4.2.1 is definitely
longer but right here it's more accurate so now let's try another model and this
is again not a big model it's my CHEP pawn again 0.28 twenty-one minutes on
cura 4.0 4.2.1 all the same settings 28 minutes so not a major difference
between these two it's a really quick print but when I printed them very
similar results cure 4.0 21 minutes actual time 27 minutes percentage-wise
that's quite a difference here are 4.2.1 28 minutes actual time 30 minutes and
once again cure 4.2.1 is far more accurate and a lot closer to the actual
print times for both slicers so now i want to try a little bit longer print so
benchy again at a magic 0.28 takes 1 hour and 11 minutes according to cura
4.0 i know this takes longer than that because i've
printed it so many times. 4.2.1 at the same layer height and all the same settings
one hour and 40 minutes now let's see how this turned out
so again cura a 4.0 one hour and 11 minutes was the estimate actual time one
hour and 39 minutes that's almost 30 minutes longer a half an hour for a
print and only was supposed to take just over an hour that's a big difference now
cura 4.2.1 reported one on 40 minutes and if you look that's almost identical
to what the actual time of cura 4.0 now the actual time with its own file was
three minutes more but it's looking really accurate so I want to try a much
bigger print so here's this twisted vase although I'm gonna print it and closed
at a 5% infill with three outer layers I'm gonna slice this at a 0.28 layer
height using cura 4.0 and when I sliced it I noticed right away that the inside
wall this was green but the outer wall was different so the inner wall was 50
millimeters per second and I knew the outer wall was slower or 25 so it matched
the print speed which is kind of what I expected and it said 4 hours and 21
minutes but now let's look at in a 4.2.1 and this is where I noticed a major
difference between you two look at the inner wall it's blue or 25 millimeters
per second which that's slow when I'm printing at 50 millimeters per second
and it added a bunch of time 6 hours and 6 minutes so this may be why people are
seeing such a big variation of 4.2.1 is the inner wall speed when I set it to 50
I'm getting, you know, around 5 hours little just a little more than 5 hours
and the inner wall is green just like I was seen in 4.0 and that's with my
profile so I went back to 4.0 and I said ok 50 millimeters per second inner
walls be 50 let's change the print speed to 70 and the inner wall speed
automatically changed to 70 so they match so I thought well I don't really
set that in my profile but when I set it back to 50 goes to 50 so why is 4.2.1
different and I had set this to 50 manually so when I change the principie
to 70 it stayed 50 but it's also got this little arrow
saying it's not default when I click default it goes to 35 or half the speed
of the print speed so that must be a setting at 4.2.1 because when I went to
50 it dropped it to 25 or half that speed so this is a new feature in 4.2.1
that it's making inner wall speed equal to half of the print speed. now if
I change it to 50 manually then I want to save that. that's what I want. but the
only way I could see to do that was to update my profile just for 4.2.1. so now
it's set that 50 inter wall speed will be set but it gives me this FX which tells me
that the setting is normally calculated but it's currently an absolute value and
so when I clicked on that to put it back to its preset it's 25 or half the speed
and then I click on the arrow it puts it to my setting 50 that I made so now I
have to live with this FX but I'd rather have that in this print because look
what it gives me cura 4.0 said it would take 4 hours and 21 minutes to print
this actual time 4 hours in 57 minutes so quite a difference but Cura 4.2.1 - 5
hours and 4 minutes so only like 7 minutes off from the actual print time
and 5 hours of 5 minutes was the actual print time using that G code so it's far
more accurate in Cura 4.2.1 so I highly suggest if you use a 4.2.1 to adjust
that inner print spped because that's what's throwing everything off. that's why
you're seeing high print times and curA 4.2.1 versus any earlier version of cura
and this setting is what's doing it all. so just set it I'm gonna adjust my
profiles but set it to match your print speed and just ignore this FX I've
updated my profiles in their linked in the description below so hopefully