diff --git a/Machining.cpp b/Machining.cpp
index 356e280..3ff542d 100644
--- a/Machining.cpp
+++ b/Machining.cpp
@@ -26,7 +26,7 @@
 
 using namespace std ;
 
-#define DEBUG_PRV 1
+#define DEBUG_PRV 0
 
 const string KEY_PRV_ROTAXIS_VAL = "PreviewRotAxisVal" ;    // salvata per ogni gruppo di Preview