Adding servo documentation

Marlin/Configuration.h

@@ -168,7 +168,7 @@
 
 #ifdef PIDTEMPBED
 //120v 250W silicone heater into 4mm borosilicate (MendelMax 1.5+)
-//from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, argressive factor of .15 (vs .1, 1, 10)
+//from FOPDT model - kp=.39 Tp=405 Tdead=66, Tc set to 79.2, aggresive factor of .15 (vs .1, 1, 10)
     #define  DEFAULT_bedKp 10.00
     #define  DEFAULT_bedKi .023
     #define  DEFAULT_bedKd 305.4
@@ -407,21 +407,11 @@ const bool Z_ENDSTOPS_INVERTING = true; // set to true to invert the logic of th
 //#define BARICUDA
 
 /*********************************************************************\
-*
 * R/C SERVO support
-*
 * Sponsored by TrinityLabs, Reworked by codexmas
-*
 **********************************************************************/
-
-// Number of servos
-//
-// If you select a configuration below, this will receive a default value and does not need to be set manually
-// set it manually if you have more servos than extruders and wish to manually control some
-// leaving it undefined or defining as 0 will disable the servo subsystem
-// If unsure, leave commented / disabled
-//
-// #define NUM_SERVOS 3
+// Number of servos, on RAMPS power to servo pins needs vcc pin jumpered to 5v pin or external supply.
+//#define NUM_SERVOS 3 // Indexing starts at 0 for M280 command
 
 #include "Configuration_adv.h"
 #include "thermistortables.h"

README.md

@@ -46,6 +46,7 @@ Features:
 *   PID tuning
 *   CoreXY kinematics (www.corexy.com/theory.html)
 *   Configurable serial port to support connection of wireless adaptors.
+*   RC Servo Support, specify angle or duration for continuous rotation servos.
 
 The default baudrate is 250000. This baudrate has less jitter and hence errors than the usual 115200 baud, but is less supported by drivers and host-environments.
 
@@ -179,6 +180,7 @@ EEPROM:
 MISC:
 
 *   M240 - Trigger a camera to take a photograph
+*   M280 - Position an RC Servo P<index> S<angle/microseconds>, ommit S to report back current angle
 *   M999 - Restart after being stopped by error
 
 Configuring and compilation: