[Octolapse] How to get stabilization extruder raised on Z?

I've seen Octolapse time lapses where the extruder is hovering several inches above the model as it progresses. What are the settings to get this effect? When I use Stabilization->"Fixed - Extruder at Center", the print head doesn't move the Z before taking snapshot.
Thanks!
Thor

I've never seen one of those, but it sounds cool!

The only way I can think of is to use the Gcode trigger, so select that option. Within your slicer you will want to add something like the following to your layer change script:

g91; Set relative axis mode
G0 Z5 ; move up 5mm, you can move up as much as you want
g90; This is probably necessary in Octolapse V0.3.4 (haven't tested). Won't be necessary in the next version.
snap ; send the octolapse snapshot pseudogcode
G91; Back to relative
G0 Z-5; move back down
G90; set absolute coordinates

There may be a way to write the z movements conditionally in your slicer to prevent it from running into the top of the Z axis for a tall script, but I'm not familiar enough with Slic3r macros to do this off the top of my head. With the script above, just make sure your model is low enough so that the z lift doesn't go too high.

Let me know how it works!

Hey Brad.. just noticed your response here, thanks! I'm thinking of the Wild Rose videos he does this a lot.. for example: https://www.youtube.com/watch?v=bgHoQ_5dT2M
My understanding is he uses Octolapse for those.. do you think he does this by modifying the gcode like you described?
Thanks!

It occured to me maybe he's just moving it to front center, but the perspective makes it look like its on top of the model?

Yeah, I think it's the perspective. It's possible there is some amount of zlift too (Octolapse will lift if it's set to). It's probably a combination of the two.

Lifting is super slow, so if you use the code I posted it will add a lot of time to the print. Might be a neat effect though.