From 7aef09e6453923748924fc2c40bed3ebfbc62a50 Mon Sep 17 00:00:00 2001
From: saal <johann@rocholl.net>
Date: Tue, 7 Aug 2012 10:59:20 +0200
Subject: [PATCH] Allow extrusion without movement.

---
 Marlin/Marlin.pde | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Marlin/Marlin.pde b/Marlin/Marlin.pde
index ce7522dd4a33..c5101272110f 100644
--- a/Marlin/Marlin.pde
+++ b/Marlin/Marlin.pde
@@ -1384,6 +1384,9 @@ void prepare_move() {
   float cartesian_mm = sqrt(sq(difference[X_AXIS]) +
 			    sq(difference[Y_AXIS]) +
 			    sq(difference[Z_AXIS]));
+  if ( cartesian_mm < 0.000001 ) {
+    cartesian_mm = abs(difference[E_AXIS]);
+  }
   if ( cartesian_mm < 0.000001 ) {
     return;
   }