SeeMeCNC Rostock MAX v2 User Manual page 106

Fishing Reel parts.
The angle of the photo doesn't show it clearly but the "double barrels" are focused at the tip of
the nozzle. The "dead air" space between the tubes prevents air from flowing over the nozzle. I know,
it's terribly clever! It's a work in progress and I've almost got it perfected with a printed double barrel
nozzle.
I suggest doing your own experiments and observations but start conservatively. I don't use a
fan during the entire part. If you find you need to turn the fan on at full blast from no air flow, do it in
stages so the hot end can equilibrate properly. You can do this manually, some slicers can support it, or
it is easy enough to learn the simple "fan mcodes" to manually insert them where you need them in the
gcode file (this is what I do for tricky parts).
M107 is fan off
M106 S50 turns the fan on at 50% - the S parameter is the speed from 0 to 100
Using a focused air flow, lower air flow and the step up technique I just described, you won't
see a significant drop in hot end temperature and you won't see a tell tale sign on the part that the user
'Polygonhell' mentions. PLA has this interesting property that if you change the extrusion temp at the
hot end, it has a visible effect on surface sheen of the part from matte to gloss as you raise the
temperature.
Rostock MAX v2 User's Guide
12 – A Strategy for Successful (and great!) Prints - 106