wirlybird
Posts: 1374
Joined: Sun Jul 17, 2016 1:32 pm

Re: Need Some Help

blackbird2016 wrote:
greybeard wrote:The Temp 245º is fine. I print PLA at 240º to 245º - it's my default temp for PLA.
Use supports.
Hey guys.
I do not want to come off topic here, but honestly...
It is pretty ok if this works for your setup and the readings of the specific sensors of specific printers, things to be printed and stuff.
But to claim 240° normal and default for PLA could really mislead people.
I too have some high temp PLA here but it is rather about its glass transition temperature and not about the print temperature.
These are temperatures fairly ok for PETG and depending on the setup at the lower end for ABS.
I really would like to see a decent "Benchy" or a "Marvin" printed with standart "over the counter" PLA at 240° or even 245°.
No offence indented...
I agree with you. Over the last year it seems people are printing PLA hotter and hotter and wondering why they are having issues such as stringing!
Most of my "regular" PLA I do at 195 to 205. I know that the Raptor PLA is a different animal and it seems Makergeeks "regular" PLA will actually print at 230-235.
If I try my other mainstream PLA's at 230 it cooks it.

I think inexperienced users are giving bad advice on temps (and other things) because they have been given bad advice like "if your PLA won't stick, just keep jacking the temp up until it does."

Ok, I'll stop going off topic also!!
greybeard
Posts: 178
Joined: Mon Mar 02, 2015 1:23 pm

Re: Need Some Help

Regardless of recommended Temp, I use Temps from the testing I do, not from what is printed. I imagine (I hope) those reading my post’s apply commonsense and, hopefully, do some testing to dial-in what works for them, their material, their printer and parts. Notice that 'infill' as well as other parameters affect results...

Attached part is helpful to dial-in overhang curved surfaces…

Referring to Motorcycle, this Lid is for my Harley’s gas tank - it is PLA and printed at 240ºC with sparsely distributed support (the support spacing was 5mm)

good luck

Oh, regarding experience: I'm a degreed Engineer with 48 yrs experience, several patents, stuff flying in space and parts in human bodies. Hence' 'Greybeard' though, it's been white for 30 yrs!
Attachments
GasTank Lid
GasTank Lid
Some Tests from Droop Test
Some Tests from Droop Test
DroopTest1.stl
DrooP Test Part1
(55.75 KiB) Downloaded 151 times
3D Print Parts
https://www.thingiverse.com/Still_Breathing/designs
wirlybird
Posts: 1374
Joined: Sun Jul 17, 2016 1:32 pm

Re: Need Some Help

greybeard wrote:Regardless of recommended Temp, I use Temps from the testing I do, not from what is printed. I imagine (I hope) those reading my post’s apply commonsense and, hopefully, do some testing to dial-in what works for them, their material, their printer and parts. Notice that 'infill' as well as other parameters affect results...

Attached part is helpful to dial-in overhang curved surfaces…

Referring to Motorcycle, this Lid is for my Harley’s gas tank - it is PLA and printed at 240ºC with sparsely distributed support (the support spacing was 5mm)

good luck

Oh, regarding experience: I'm a degreed Engineer with 48 yrs experience, several patents, stuff flying in space and parts in human bodies. Hence' 'Greybeard' though, it's been white for 30 yrs!
Wasn't implying anything directed at you regarding experience!

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