diff --git a/newton-4.00/applications/ndSandbox/demos/ndAdvancedIndustrialRobot.cpp b/newton-4.00/applications/ndSandbox/demos/ndAdvancedIndustrialRobot.cpp
index 503c48ed1..8667d5966 100644
--- a/newton-4.00/applications/ndSandbox/demos/ndAdvancedIndustrialRobot.cpp
+++ b/newton-4.00/applications/ndSandbox/demos/ndAdvancedIndustrialRobot.cpp
@@ -87,8 +87,8 @@ namespace ndAdvancedRobot
 
 	#define ND_MIN_X_SPAND			ndReal (-2.2f)
 	#define ND_MAX_X_SPAND			ndReal ( 1.5f)
-	#define ND_MIN_Z_SPAND			ndReal (-1.2f)
-	#define ND_MAX_Z_SPAND			ndReal ( 1.3f)
+	#define ND_MIN_Z_SPAND			ndReal (-1.0f)
+	#define ND_MAX_Z_SPAND			ndReal ( 1.2f)
 
 	#define ND_ACTION_SENSITIVITY	ndReal ( 0.10f)
 
diff --git a/newton-4.00/applications/ndSandbox/demos/ndSimpleIndustrialRobot.cpp b/newton-4.00/applications/ndSandbox/demos/ndSimpleIndustrialRobot.cpp
index 99b77ad16..4f29da91e 100644
--- a/newton-4.00/applications/ndSandbox/demos/ndSimpleIndustrialRobot.cpp
+++ b/newton-4.00/applications/ndSandbox/demos/ndSimpleIndustrialRobot.cpp
@@ -58,7 +58,7 @@ namespace ndSimpleRobot
 
 	#define ND_MIN_X_SPAND	ndReal (-2.2f)
 	#define ND_MAX_X_SPAND	ndReal ( 1.5f)
-	#define ND_MIN_Z_SPAND	ndReal (-1.2f)
+	#define ND_MIN_Z_SPAND	ndReal (-1.0f)
 	#define ND_MAX_Z_SPAND	ndReal ( 1.2f)
 
 	class ndRobotBodyNotify : public ndDemoEntityNotify