Thank you for taking the time,
I did end up reading last night cura slowly ramps fan speeds up to full by the 5mm height mark I believe. So the progression you've explained makes a lot of sense.
I'll have to experiment with some prints before I go for something big. It's funny, because I felt like I was starting to get excellent results fairly consistently from Cura, but the manual supports and ability to control virtually everything in the process is a major draw towards Simplify3D.
I've also been using hairspray since I switched to ColorFabb, and it works very well, so I'm happy about not having to use a brim.
Now to just find some time to get accustom to simplify
All your assumptions are correct. But there's no perfect answer and sometimes depends on what you print.
S3D fans go 'on' at specific layer number, so you need to remember that if you change the print layer height (resolution) the fans will go on sooner or later.
I use to set a minimum fan at layer 4-7 and then I ramp up 10-20% each 5-10 layers. But for hard overhagns I go slow at layer 2 and increase it.
If you use glue/hairspray on the bed, or the object it's just 1 on the center of the bed, you should be able set a higher fan sooner.
Also check that bridging has a specific fan speed (if you activate the option) so you can set a higher fan for that.
It really depends on what you print. Because if you print many small objects the fan really close to the bed might kill adhesion.
Also it's a good idea to avoid a full blast, because the air will hit the hotend and will lower the temp 1-2C. Doing it progressively helps the PID keep the heat constant without big drops in temp that can affect print quality.
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