From 8e239ce76f54ea0b261e3b4e7d3f0cdd30cec9a0 Mon Sep 17 00:00:00 2001
From: PavelSindler <sindlerpa@gmail.com>
Date: Fri, 15 Sep 2017 11:29:35 +0200
Subject: [PATCH] changed M220

---
 Firmware/Marlin_main.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 16ddb4f157..496f020323 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -6080,11 +6080,15 @@ SERIAL_PROTOCOLPGM("\n\n");
       SERIAL_ECHOLN("");
     }break;
     #endif
+
     case 220: // M220 S<factor in percent>- set speed factor override percentage
     {
-      if(code_seen('S'))
-      {
+	  if (code_seen('B')) //backup current speed factor
+	  {
 		saved_feedmultiply_mm = feedmultiply;
+	  }
+      if(code_seen('S'))
+      {		
         feedmultiply = code_value() ;
       }
 	  if (code_seen('R')) { //restore previous feedmultiply