diff --git a/Grbl_Esp32/Machines/pen_laser.h b/Grbl_Esp32/Machines/pen_laser.h
index 036415eb..eb405f2e 100644
--- a/Grbl_Esp32/Machines/pen_laser.h
+++ b/Grbl_Esp32/Machines/pen_laser.h
@@ -51,7 +51,7 @@
 
 // If SPINDLE_PWM_PIN is commented out, this frees up the pin, but Grbl will still
 // use a virtual spindle. Do not comment out the other parameters for the spindle.
-#define SPINDLE_PWM_PIN    GPIO_NUM_17 // Laser PWM
+//#define SPINDLE_PWM_PIN    GPIO_NUM_17 // Laser PWM
 
 #define USING_SERVO  // uncomment to use this feature
 //#define USING_SOLENOID // uncomment to use this feature
@@ -59,8 +59,8 @@
 #ifdef USING_SERVO
     #define USE_SERVO_AXES
     #define SERVO_Z_PIN     GPIO_NUM_27
-    #define SERVO_Z_RANGE_MIN 0
-    #define SERVO_Z_RANGE_MAX 10
+    #define SERVO_Z_RANGE_MIN 0.0
+    #define SERVO_Z_RANGE_MAX 10.0
 #endif
 
 #ifdef USING_SOLENOID
@@ -99,8 +99,8 @@
 
 #define DEFAULT_LASER_MODE 0 // false
 
-#define DEFAULT_X_STEPS_PER_MM 80
-#define DEFAULT_Y_STEPS_PER_MM 80
+#define DEFAULT_X_STEPS_PER_MM 80.0
+#define DEFAULT_Y_STEPS_PER_MM 80.0
 #define DEFAULT_Z_STEPS_PER_MM 100.0 // This is percent in servo mode...used for calibration
 
 #define DEFAULT_X_MAX_RATE 5000.0 // mm/min
diff --git a/Grbl_Esp32/servo_axis.h b/Grbl_Esp32/servo_axis.h
index fefb71af..75d4bb35 100644
--- a/Grbl_Esp32/servo_axis.h
+++ b/Grbl_Esp32/servo_axis.h
@@ -79,7 +79,7 @@
 #define SERVO_CAL_MIN 20.0 // Percent: the minimum allowable calibration value
 #define SERVO_CAL_MAX 180.0 // Percent: the maximum allowable calibration value
 
-#define SERVO_TIMER_INT_FREQ 20 // Hz This is the task frequency
+#define SERVO_TIMER_INT_FREQ 20.0 // Hz This is the task frequency
 
 #define SERVO_HOMING_OFF 0 // servo is off during homing
 #define SERVO_HOMING_TARGET 1 // servo is send to a location during homing