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« on: January 01, 2015, 09:07:54 AM »
Ok first thing to say is be aware CSS doesnt work too great in Mach3, never has, never will.
If in Feed Per Min mode (G94) then it kind of works but to my mind CSS and G94 is not really using things as they should be, you will be keeping the surface speed constant but your feedrate will also stay constant so the chipload will increase or decrease as the spindle speed alters.
In G95 (Feed per Rev) it doesnt work as all it does is keep the feedrate constant to what it was at the start of the commanded move, ie it basically sees it as a G94 feed and keeps it at that.
Now your messages, probably you see the Too Fast one as you are commanding a CSS and a X move which will mean that your spindle will need to rotate faster than it is set in Spindle pulleys.
You can limit the max spindle speed from the code with a G48.
For example
G96 S200 (this will set your surface speed to 200 units per min)
G48s1400 (this will ensure that the max RPM never exceeds 1400)
Hood