I have had to create a new config as I lost my working one,
I have got everything working now except homing
when I try to home the x and y are fine, but the z axis just keeps crunching is the best way to describe it.
I can move the Z axis with the control panel, up and down 10-50mm works fine.
I have tried adjusting the gamma_max_rate but that only seems to slow down the movement from the control panel.
z_axis_max_speed seems to do the same.
As I say the z axis moves fine up and down from pronterface and simplify3d etc, its just when you start a print job the z axis jams.