From 747a2257dd4b104fe53710ebaef443794ea70b6b Mon Sep 17 00:00:00 2001
From: Scott Lahteine <sourcetree@thinkyhead.com>
Date: Thu, 22 Sep 2016 14:27:22 -0500
Subject: [PATCH] Only deploy/stow BLTOUCH on downward move

---
 Marlin/Marlin_main.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 63115ff7c5..51962d076f 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -2194,7 +2194,8 @@ static void clean_up_after_endstop_or_probe_move() {
 static void do_homing_move(AxisEnum axis, float where, float fr_mm_s=0.0) {
 
   #if HOMING_Z_WITH_PROBE && ENABLED(BLTOUCH)
-    if (axis == Z_AXIS) set_bltouch_deployed(true);
+    bool deploy_bltouch = (axis == Z_AXIS && where < 0);
+    if (deploy_bltouch) set_bltouch_deployed(true);
   #endif
 
   current_position[axis] = 0;
@@ -2204,7 +2205,7 @@ static void do_homing_move(AxisEnum axis, float where, float fr_mm_s=0.0) {
   stepper.synchronize();
 
   #if HOMING_Z_WITH_PROBE && ENABLED(BLTOUCH)
-    if (axis == Z_AXIS) set_bltouch_deployed(false);
+    if (deploy_bltouch) set_bltouch_deployed(false);
   #endif
 
   endstops.hit_on_purpose();