diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index d6b7a13..4428a86 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/Sawing.cpp b/Sawing.cpp
index 84bf3e2..703fd10 100644
--- a/Sawing.cpp
+++ b/Sawing.cpp
@@ -1592,7 +1592,7 @@ Sawing::GenerateLineCl( const ICurveLine* pLine, const Vector3d& vtTool, const V
       double dCutH = dElev - dExtraCut ;
       int nStep = 2 ;
       if ( m_Params.m_nStepType == SAW_ST_ZIGZAG) {
-         nStep = static_cast<int>( ceil( dCutH / dActStep)) ;
+         nStep = static_cast<int>( ceil( dCutH / ( dActStep + EPS_SMALL))) ;
          if ( ( nStep % 2) == 1)
             nStep += 1 ;
       }
@@ -1629,7 +1629,7 @@ Sawing::GenerateLineCl( const ICurveLine* pLine, const Vector3d& vtTool, const V
      // 2-3 -> lavorazione
       // calcolo numero e valore degli step
       double dCutH = dElev - dExtraCut ;
-      int nStep = static_cast<int>( ceil( dCutH / dActStep)) ;
+      int nStep = static_cast<int>( ceil( dCutH / ( dActStep + EPS_SMALL))) ;
       double dStep = dCutH / nStep ;
       // esecuzione degli step
       for ( int i = nStep - 1 ; i >= 0 ; -- i) {
@@ -2215,7 +2215,7 @@ Sawing::GenerateExtCurveCl( const ICurveComposite* pCrv,
       double dCutH = dElev - dExtraCut ;
       int nStep = 2 ;
       if ( m_Params.m_nStepType == SAW_ST_ZIGZAG) {
-         nStep = static_cast<int>( ceil( dCutH / m_Params.m_dStepExtArc)) ;
+         nStep = static_cast<int>( ceil( dCutH / ( m_Params.m_dStepExtArc + EPS_SMALL))) ;
          if ( ( nStep % 2) == 1)
             nStep += 1 ;
       }
@@ -2308,7 +2308,7 @@ Sawing::GenerateExtCurveCl( const ICurveComposite* pCrv,
      // 2-3 -> lavorazione
       // calcolo numero e valore degli step
       double dCutH = dElev - dExtraCut ;
-      int nStep = static_cast<int>( ceil( dCutH / m_Params.m_dStepExtArc)) ;
+      int nStep = static_cast<int>( ceil( dCutH / ( m_Params.m_dStepExtArc + EPS_SMALL))) ;
       double dStep = dCutH / nStep ;
       // esecuzione degli step
       for ( int i = nStep - 1 ; i >= 0 ; -- i) {
@@ -2898,7 +2898,7 @@ Sawing::GenerateIntArcCl( const ICurveArc* pArc,
       double dCutH = dElev - dExtraCut ;
       int nStep = 2 ;
       if ( m_Params.m_nStepType == SAW_ST_ZIGZAG) {
-         nStep = static_cast<int>( ceil( dCutH / m_Params.m_dStepIntArc)) ;
+         nStep = static_cast<int>( ceil( dCutH / ( m_Params.m_dStepIntArc + EPS_SMALL))) ;
          if ( ( nStep % 2) == 1)
             nStep += 1 ;
       }
@@ -2993,7 +2993,7 @@ Sawing::GenerateIntArcCl( const ICurveArc* pArc,
      // 2-3 -> lavorazione
       // calcolo numero e valore degli step
       double dCutH = dElev - dExtraCut ;
-      int nStep = static_cast<int>( ceil( dCutH / m_Params.m_dStepIntArc)) ;
+      int nStep = static_cast<int>( ceil( dCutH / ( m_Params.m_dStepIntArc + EPS_SMALL))) ;
       double dStep = dCutH / nStep ;
       // esecuzione degli step
       for ( int i = nStep - 1 ; i >= 0 ; -- i) {