Printing speed... same item printed with PLA-profile is slower as with a TPU-profile!
Hello,
I was trying to print something with TPU, therefore I searched for a NinjaTek Cheetah profile in PrusaSliver (which I couldn't find). I therefore selected both Materhacker and Eolas TPU profiles for testing.
It wonders me that whem I select my PLA-profile the print takes much longer then when I select Materhackers or Eolas TPU profile. Should this not be the other way around because you have to print TPU much slower?
There is a big difference in Max Volumetric Speed (PLA = 15, TPU = 1.2). I thought that this would change the printingspeed? Did I overlook something?
RE: Printing speed... same item printed with PLA-profile is slower as with a TPU-profile!
Printer is a Creality Ender 5 Plus, 8bit board, default firmware...
RE: Printing speed... same item printed with PLA-profile is slower as with a TPU-profile!
If you want to upload the zip=compressed 3MF project file, we can take a look at what's going on. Depending on the model, I wouldn't be surprised if both were the same (hotend may never be able to get to full speed) but PLA being slower than TPU is indeed a bit surprising.
RE: Printing speed... same item printed with PLA-profile is slower as with a TPU-profile!
Have attached 3MF-project files, PLA and TPU... It takes 1 hour and 15 minutes to print in PLA, only 38 minutes with the TPU profile...
RE: Printing speed... same item printed with PLA-profile is slower as with a TPU-profile!
The forum update seems to be messing with file downloads. If I click on it Im getting an xml error message
<Error><Code>AccessDenied</Code><Message>Access denied.</Message><Details>Anonymous caller does not have storage.objects.get access to the Google Cloud Storage object. Permission 'storage.objects.get' denied on resource (or it may not exist).</Details></Error>
Seems the web monkeys have a few kinks to work out 🙂
RE: Printing speed... same item printed with PLA-profile is slower as with a TPU-profile!
Today is the day of server maintenance and switchover to the new platform. so that would explain it.
RE: Printing speed... same item printed with PLA-profile is slower as with a TPU-profile!
Have put the file on dropbox to download till forum is fixed: https://www.dropbox.com/scl/fi/qndejus0lhlxmt66a88vn/PLA_vs_TPU.zip?rlkey=0z9w5o2s7ssmtlwy55uv8ar16&dl=0
RE: Printing speed... same item printed with PLA-profile is slower as with a TPU-profile!
Both projects when I load them have the same PLA filament assigned to them. So not very useful.
However I can tell you what is slowing your PLA print down. Its the setting that everyone misses. Filament Settings>Cooling>Cooling Thresholds>Slow Down if Layer time is below.
Your object is so small and the perimeters/external perimeters are 25mm (slower than gapfill for some reason) cause the part to be printed artificially much slower. I normally change that settings to something around 3-5 seconds on all my filament profiles. That combined with it never actually getting up to a fast speed acceleration wise means the PLA is actually being printed at slower than TPU speeds.
Max volumetric values are a max speed ceiling. If the other print settings mean it never gets to the volumetric limit then it doesn't make any difference whatsoever. Its like saying the max speed on this road is 100mph but then having someone on a bicycle and someone on a set of roller skates go down it. Neither gets to 100mph.