Calibration cubes
left - x1 extrusion multiplier
Middle - x1.1 extrusion multiplier
Right - x1.25 extrusion multiplier
Any thoughts? At 1 i can see gaps between the perimeters but at 1.25 im overkilling it lol
Both 2 and 3 look overextruded. I do see what you are saying with 1 though. I would do 1.05 and see how that works.
Worth a shot!
1.25 means 1/4 more plastic 
proper way to tune extrusion multiplier (assuming you have tuned the temperature already) would be so:
- print 0% infill, 2 or 3 perimeters, no tops or bottoms.
- using a good quality caliper measure the width of the walls - assuming the extrusion width is .4 then the wall should be .8 (2 perimeters) or 1.2 (3 perimeters) subject to how many perimeters you have printed.
if the walls are thicker then tune down the extrusion multiplier and reprint
if the walls are thinner then tune up the extrusion multiplier and reprint.
adjust the extrusion multiplier and reprint.
Yeah i had done the 100mm test it only extruded 80mm so 100/80 gave me 1.25 i would try the caliper test but for some odd reason my calipers are only measuring by half. Like if the ruler says 8mm my calipers say 4mm if the ruler says 55 my calipers say 27.5 its weird
@Cristian_Martinez your steps per mm on extrusion is wrong in that case. you will need to tune that first.
Yeup. Unfortunately i need to upgrade my firmware first as the current version doesnt allow you to write to EEPROM
@Cristian_Nicola what about the overlap? I usually use 20%, that changes the wall thickness