From ef68c1910c4597b55df7ac641a37485eb60f1b61 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <sourcetree@thinkyhead.com>
Date: Sat, 27 Feb 2016 22:26:44 -0800
Subject: [PATCH] Check that the temperature is close to target

---
 Marlin/Marlin_main.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index bcedd19c9..9f49d3c5e 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -3960,8 +3960,8 @@ inline void gcode_M109() {
     // Loop until the temperature has stabilized
     #define TEMP_CONDITIONS (residency_start_ms < 0 || now < residency_start_ms + TEMP_RESIDENCY_TIME * 1000UL)
   #else
-    // Loop until the temperature is exactly on target
-    #define TEMP_CONDITIONS (degHotend(target_extruder) != degTargetHotend(target_extruder))
+    // Loop until the temperature is very close target
+    #define TEMP_CONDITIONS (fabs(degHotend(target_extruder) - degTargetHotend(target_extruder)) < 0.75f)
   #endif //TEMP_RESIDENCY_TIME
 
   cancel_heatup = false;
@@ -3984,7 +3984,7 @@ inline void gcode_M109() {
         }
       #else
         SERIAL_EOL;
-      #endif
+      #endif //TEMP_RESIDENCY_TIME
     }
 
     idle();