From: Jim Morris <morris@wolfman.com>
Date: Sat, 31 Mar 2018 10:35:39 +0000 (+0100)
Subject: add comment
X-Git-Url: https://git.hcoop.net/clinton/Smoothieware.git/commitdiff_plain/3b2168fea555e259188109719b22b24363299c94

add comment
---

diff --git a/src/modules/robot/Robot.cpp b/src/modules/robot/Robot.cpp
index aa28a490..c8e32157 100644
--- a/src/modules/robot/Robot.cpp
+++ b/src/modules/robot/Robot.cpp
@@ -1455,7 +1455,8 @@ bool Robot::append_arc(Gcode * gcode, const float target[], const float offset[]
         return false;
     }
 
-    // Scary math
+    // Scary math.
+    // We need to use arc_milestone here to get accurate arcs as previous machine_position may have been skipped due to small movements
     float center_axis0 = this->arc_milestone[this->plane_axis_0] + offset[this->plane_axis_0];
     float center_axis1 = this->arc_milestone[this->plane_axis_1] + offset[this->plane_axis_1];
     float linear_travel = target[this->plane_axis_2] - this->arc_milestone[this->plane_axis_2];