cutting diamond plate

[ggeh]

I tried to cut some aluminum 1/8" diamond plate, diamonds up. The torch contacted the first diamond it came to and kicked it off the magnetic mount. So I flipped the plate over and tried again and it seemed to cut fine but not through the diamonds on the back side. I used the settings in the hypertherm oper. manual. 65 amps cut speed 280, 124 volts. dthc on auto. How or what do I need to cut diamond plate?

Bobcad
sheetcam
mach3
hypertherm 85
4x4 bulltear table non ohmic torch
candcnc esp II A




Thanks Gary