(10/19/2016)
I did retraction calibration for B'struder.
Extruder drive: B’struder
Kysan Nema 17 5.18:1 geared stepper motor, 2.4 V, 1.0 A
config.g of RepRapFirmware-dc42 1.12a
M92 411.230
M201 X4000 Y4000 Z4000 E3000 ; Accelerations (mm/s^2)
M203...