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Thread: Another Sintratec kit built
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11-18-2016, 01:55 AM #1
the chamber temperature does matter. But everthing between 140-150 C is fine. But the surface temperature is much more important, a difference between 1-2 C can make the difference between a failed and a sucssesful print!.
As I already stated your temperature distribution has to be alright before you can get start fine tuning your prints. Here is what you should do:
-Do not use custom settings for starting. For starting use the standart PA12 settings. You can experiment that later. The custom settings are meant for people that exactly know what they are doing.
-As rudschul stated the front sheet of the lamp has to be perfectly aligned with the backside of the powder surface. If its to far, the back will get to hot and the front to cold. If you have h shadown on your print surface your front will get to hot and back to cold. To get an even distribution it has to be aligned perfectly.
- Preheat your printer. about 1.5 hours should be sufficent
- load a calibration print (only one in the middle) and force the printer into powder prep mode
- raise your powder temperature 1 C.
- wait for about 1 min and check the powder.
- raise temperature again
- repeat until you see your powder darken/ get burned
- reduce temp 1.5 C ------> This will be your printing temperature
- if you hit 180 C and the powder does still not get burned check your sensor position / laser glass. Something might not be right.
I strongly discourage from preheat temperatures over 150 C as this will degrade your powder in short and long term! Also you run the risk of overheating! The problem here is when you heat your powder with temps over 150 for a long time it might graded and turn black witch results melting your powder in the build chamber. This will cause serious damage to your printer.
A little fluctuation is normal.
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10-20-2024, 05:02 PM in 3D Printer Parts, Filament & Materials