From 2616df66af8046630fe1488c4b1048e3a0d0f1bd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gu=C3=B0ni=20M=C3=A1r=20Gilbert?= <gudni.m.g@gmail.com>
Date: Tue, 30 Aug 2022 20:53:19 +0000
Subject: [PATCH] PFW-1386 st_get_position_mm() is more accurate when using
 endstops (not homed printer)

If the endstops kick in, then st_get_position_mm shows the actual travel distance. current_position[Z-AXIS] does not get updated correctly thus we cannot use it when unhomed.

current_position[Z-AXIS] is later set to Z_MAX_POS,
we cannot use that either to calculate the travel distance
---
 Firmware/Marlin_main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 3ade776fd..048344ffe 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -2128,7 +2128,7 @@ float raise_z(float delta)
         st_synchronize();
 
         // Get the final travel distance
-        travel_z = current_position[Z_AXIS] - travel_z;
+        travel_z = st_get_position_mm(Z_AXIS) - travel_z;
 #ifdef TMC2130
         if (endstop_z_hit_on_purpose())
         {