Help withController dip switch settings and Mach3 motor tuning

[JAZZCNC]

I wouldn't use Eddy's settings. (Sorry Eddy no offence)

Motors are 3A so go to nearest lowest not higher. . .So 2.8A going higher can lead to hot motors.
sw1-off
sw2-off
sw3-on

Currant mode is for when motors are at stand still so set to Half current mode and they won't get red hot.
sw4-off

Micro stepping will depend on few factors like PC speed and parallel port speed etc so I'd start lower first. So 800 Micro steps.(1/4 stepping)
sw5-on
sw6-off
sw7-on
sw8-on
If your parallel port can stand the strain then having higher micro stepping gives smoother running motors and lessens chance for resonance.

Are you sure it's 80mm per revolution.? That's a large pitch and low resolution.!! . . . . If correct then use 10 in Steps per in Mach. (80mm/800Ms=10steps per/mm)