I have recently started to print with PETG. It is a very nice material, because when printed properly, results are incredibly robust, have a nice glossy finish, and can be quite transparent. It is also reasonably heat-resistant, not as good as ABS but better than PLA, and it is as good as odorless.
The biggest problems I have with PETG are overhangs, especially on curved shapes: they tend to curl upwards, and this effect accumulates to the point where it turns into an ugly mess.
The typical tricks to print overhangs beyond the 45° limit seem to fail for PETG:
- Provide a lot of cooling: this ruins layer adhesion, meaning the prints become very brittle, and it makes the surface of the print dull instead of shiny. I can only enable the fan at a very low speed that is not sufficient to instantly solidify the overhang.
- Slow down the print: this allows the nozzle to heat up the already printed overhang for a longer time, and this causes it to curl up even more.
- Print in thinner layers: also seems to promote curling because the hot nozzle is nearer to the previous layers and reheats them.
- Supports: they are a pain to remove cleanly due to the strength and layer adhesion of PETG.
- Reduce temperature: I couldn't find a temperature where the curling stops before the extruded material turns into snot.
Does anyone have experience in printing steep overhangs with PETG?
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All is in this link
I bought a Toshiba FlashAir W-03 SD Card.
It works very well on my FFCP 2016 with sailfish 7.7
I recommend it.
Price was around 20€ beginning of January.
If you have troubles to configure it or use the FlashAir software, please contact me!
Thanks to DrLex for his help!