oh, please - no! Not that one...
Dont get me wrong, there is a lot of good info in Triffid Hunter's guide, but the E-step calibration is not (to me) good info.
to get the best, most accurate prints possible, you need to be more exacting with what goes in - if you ask your printer to feed in 100mm of filament, it should feed in exactly 100mm of filament. not 98, not 102 - 100.
The method that Mr. Hunter uses is more a fudging method, not exacting.
I have had this discussion with several people now and the biggest argument I get for following that guide is, "but it's in the reprap wiki, it must be good info". Well, guess what - anyone can write a wiki article. And some of the info in that guide is outdated - namely the feed rate (e-steps) calibration.
this is the method I use for calibration:
Part 1: http://northwoods3d.weebly.com/blog/fi … ion-part-1
Part 2: http://northwoods3d.weebly.com/blog/-fl … coming-out
and I have the quality prints to back it up.
on the 80% thing - that is for maximum layer height. you can go lower if you like with your 0.4 nozzle, but you will need to make adjustments to get good quality. I have gone as low as 0.127 with my 0.4 nozzle (that is on a Solidoodle with a 5/16" threaded rod - slightly different numbers than for metric rods)
this print was done at a '0.3' layer height (SD equivalent = 0.2963) with a 0.4 nozzle and it has excellent detail.
SD4 #1 & #2 - Lawsy carriages, E3D v6, Rumba controller board, mirror bed plate, X motor fan, upgraded PSU & Mica bed heater
SD4 #3 - in the works ~ Folgertech FT-5, rev 1
Printit Industries Beta Tester - Horizon H1