Whadda Racket! I’d never HEARD the printer make a sound like this…upon observation, it was due to the honeycomb structure lining up with the Delta’s towers and creating a resonance.
Don’t use honeycomb infill. It inflates your gcode unneededly, isn’t as strong as people like to claim, and puts unneeded stress on your bot.
It’s actually not infill…it’s a pen holder. 
But yeah, I can see why.
It’s nice to see you actually printing something useful at last !
hush…it’s not done yet. Besides, how many pencil holders does a guy need?
This was my ‘I wonder if I can fill most of the print envelope’ test.
I bet your print comes out perfectly, and doesn’t mess up AT ALL!
Hehe, now I’ve jinxed ya. 
It sure could use a little retract, that’s fer damn sure. It’d be cool to be able to fiddle with certain parameters on the fly…
@ThantiK What kind of infill do you suggest? If I’m using KISSlicer I go with “rounded” and just let Cura do it’s grid thing, but with Slic3r I do usually use honeycomb.
if you do not like the resonance simply rotate your object slight by say 5 degrees and the honeycomb should not be in sync and more. I love honeycomb and I do believe on the horizontal plane it is very strong and if you add a solid level every few the horizontal strength can have vertical strength added as well.
As far as gcode inflation yes it will increase but I have yet had a print fail due to the size off the gcode file. Its a basic text file not sure of the harm really.
@John_Davis line infill. Rounded sounds like it would be even worse than honeycomb. Line is just point a to point b across the part, and it alternates across layers.
@ThantiK KISSlicer’s rounded infill is designed to allow faster moves (not so jerky) while approximating a honeycomb type structure. I haven’t done any strength testing on the different types of infill (although that’s not a bad idea) but agree with @J_Janes that Gcode inflation alone doesn’t seem all that compelling (although one assumes it takes longer to slice - already a resounding weak point for Slic3r - and longer to print). I imagine the honeycomb resonance problem may be more dramatic for delta printers and haven’t found it to be too problematic with my (cartesian) bot.
@ThantiK But if you print the clear ABS/PLA the honeycomb infill locks awesome, and is the extra time worth.
Besides if you can’t see the infill the honeycomb pattern is a wast of time.