I have tried to setup the grblsheild to be a little more peppy and I am not sure about settings for this I assume that the motors are affected by the following parameters:
$3=50
$4=500.00
$5=1000.00
$6=224
$7=25
$8=100
Could it also be that the trim pots are not set correctly?
Z is setup for microstepping and it seems faster than the x and y.
What parameters will increase the speed of movement and what are reasonable max values?