From 929e1de2536b89f42e4b25dab5ad079fec86f74b Mon Sep 17 00:00:00 2001
From: PavelSindler <sindlerpa@gmail.com>
Date: Thu, 14 Sep 2017 20:33:25 +0200
Subject: [PATCH 1/3] special variable for saving/restoring feedmultiply using
 M220

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

diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 3496a971c..16ddb4f15 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -394,6 +394,8 @@ static bool saved_extruder_relative_mode = false;
 static int saved_fanSpeed = 0; //!< Print fan speed
 //! @}
 
+static int saved_feedmultiply_mm = 100;
+
 //===========================================================================
 //=============================Routines======================================
 //===========================================================================
@@ -6082,8 +6084,12 @@ Sigma_Exit:
     {
       if(code_seen('S'))
       {
+		saved_feedmultiply_mm = feedmultiply;
         feedmultiply = code_value() ;
       }
+	  if (code_seen('R')) { //restore previous feedmultiply
+		  feedmultiply = saved_feedmultiply_mm;
+	  }
     }
     break;
     case 221: // M221 S<factor in percent>- set extrude factor override percentage

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 2/3] 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 16ddb4f15..496f02032 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -6080,11 +6080,15 @@ Sigma_Exit:
       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

From d1d4a8c58cb11ad274ce4a8285e298e9a3de7906 Mon Sep 17 00:00:00 2001
From: PavelSindler <sindlerpa@gmail.com>
Date: Thu, 29 Nov 2018 17:33:36 +0100
Subject: [PATCH 3/3] whitespace

---
 Firmware/Marlin_main.cpp | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 496f02032..25c005c59 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -6083,17 +6083,17 @@ Sigma_Exit:
 
     case 220: // M220 S<factor in percent>- set speed factor override percentage
     {
-	  if (code_seen('B')) //backup current speed factor
-	  {
-		saved_feedmultiply_mm = feedmultiply;
-	  }
+      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
-		  feedmultiply = saved_feedmultiply_mm;
-	  }
+      if (code_seen('R')) { //restore previous feedmultiply
+        feedmultiply = saved_feedmultiply_mm;
+      }
     }
     break;
     case 221: // M221 S<factor in percent>- set extrude factor override percentage