#define SPINDLEAXIS 5		// Axis Channel to Jog to rotate Spindle
#define FACTOR (3600/60.0)  	// to convert RPM to counts/sec (counts/rev / 60.0sec)
#define SPINDLECW_BIT 154   	// bit to activate to cause CW rotation
#define SPINDLECCW_BIT 155	// bit to activate to cause CCW rotation
#define SPEEDVAR 99			// global persistant variable to store latest speed
#define STATEVAR 98		// global persistant variable to store latest state (-1=CCW,0=off,1=CW)
#define KMVAR PC_COMM_CSS_S 	// variable KMotionCNC will pass speed parameter (113)
#define USE_POS_NEG_VOLTAGE 1 	// 0 = output Magnitude, 1 = output positive and negative speed