diff --git a/Milling.cpp b/Milling.cpp
index 1f26db4..7fee94e 100644
--- a/Milling.cpp
+++ b/Milling.cpp
@@ -4228,13 +4228,46 @@ Milling::CalcTabsPositions( const ICurveComposite* pCompo, bool bPathTabsEnable,
    if ( ! bPathTabsEnable)
       return true ;
 
+  // lunghezza di un Tab
+   double dTabLen = tdTabs.m_dRampLen + tdTabs.m_dTopLen + tdTabs.m_dRampLen ;
+
   // lunghezza del percorso
    double dLen ; pCompo->GetLength( dLen) ; dLen -= m_dAddedOverlap ;
+  // vettore estrusione del percorso
+   Vector3d vtExtr ; pCompo->GetExtrusion( vtExtr) ;
+   if ( vtExtr.IsSmall())
+      vtExtr = Z_AX ;
 
+#if 0
   // determinazione intervalli validi
    Intervals ivTabs ;
   // inizializzo intervallo valido
    ivTabs.Set( 0, dLen) ;
+  // elimino le zone vicine agli angoli
+   bool bContinue = true ;
+   double dCurrLen = 0 ;
+   const ICurve* pCurrCrv = pCompo->GetFirstCurve() ;
+   const ICurve* pNextCrv = pCompo->GetNextCurve() ;
+   while ( pNextCrv != nullptr) {
+     // aggiorno lunghezza
+      double dTmp = 0 ;
+      pCurrCrv->GetLength( dTmp) ;
+      dCurrLen += dTmp ;
+     // verifico se angolo tra le entità
+      Vector3d vtTg1 ; pCurrCrv->GetEndDir( vtTg1) ;
+      Vector3d vtTg2 ; pCurrCrv->GetStartDir( vtTg2) ;
+      if ( abs( ( vtTg1 ^ vtTg2) * vtExtr) > sin( 5 * DEGTORAD)) {
+      
+      } 
+     // passo al successivo
+      pCurrCrv = pNextCrv ;
+      pNextCrv = ( bContinue ? pCompo->GetNextCurve() : nullptr) ;
+      if ( pNextCrv == nullptr  &&  pCompo->IsClosed()) {
+         pNextCrv = pCompo->GetFirstCurve() ;
+         bContinue = false ;
+      }
+   }
+
   // elimino parti (test)
    if ( dLen > 300) {
       ivTabs.Subtract( 0, 100) ;
@@ -4243,13 +4276,14 @@ Milling::CalcTabsPositions( const ICurveComposite* pCompo, bool bPathTabsEnable,
    else {
       ivTabs.Subtract( 0.4 * dLen, 0.6 * dLen) ;
    }
+#endif
 
   // determino posizioni di inizio dei Tabs
    double dNextTab = 0.5 * tdTabs.m_dBottomLen ;
    double dCurrLen = 0 ;
    while ( dCurrLen + dNextTab < dLen) {
       vdTabs.emplace_back( dCurrLen + dNextTab) ;
-      dCurrLen += dNextTab + tdTabs.m_dRampLen + tdTabs.m_dTopLen + tdTabs.m_dRampLen ;
+      dCurrLen += dNextTab + dTabLen ;
       dNextTab = tdTabs.m_dBottomLen ;
    }
    if ( ! vdTabs.empty())