diff --git a/VolZmapCalculus.cpp b/VolZmapCalculus.cpp
index a4db450..9e7e8f6 100644
--- a/VolZmapCalculus.cpp
+++ b/VolZmapCalculus.cpp
@@ -2068,14 +2068,14 @@ VolZmap::IntersLineCylinder( const Point3d& ptLineSt, const Vector3d& vtLineDir,
    int nBasInt = 0 ;
    if ( abs( vtV.z) > EPS_ZERO) {
       // le linee tangenti al cilindro non sono considerate intersecanti
-      double EpsRad = ( vtV.IsZeroXY() ? - EPS_SMALL : EPS_SMALL) ;
+      double dEpsRad = ( vtV.IsZeroXY() ? - EPS_SMALL : EPS_SMALL) ;
       ptInt1 = ptP + ( ( 0 - ptP.z) / vtV.z) * vtV ;
-      if ( ptInt1.x * ptInt1.x + ptInt1.y * ptInt1.y < dRad * dRad + 2 * dRad * EpsRad) {
+      if ( ptInt1.x * ptInt1.x + ptInt1.y * ptInt1.y < dRad * dRad + 2 * dRad * dEpsRad) {
          nBasInt += 1 ;
          vtN1 = Z_AX ;
       }
       ptInt2 = ptP + ( ( dH - ptP.z) / vtV.z) * vtV ;  
-      if ( ptInt2.x * ptInt2.x + ptInt2.y * ptInt2.y < dRad * dRad + 2 * dRad * EpsRad) {
+      if ( ptInt2.x * ptInt2.x + ptInt2.y * ptInt2.y < dRad * dRad + 2 * dRad * dEpsRad) {
          nBasInt += 2 ;
          vtN2 = - Z_AX ;
       }
@@ -2196,12 +2196,12 @@ VolZmap::IntersLineConus( const Point3d& ptLineSt, const Vector3d& vtLineDir,
   // Determino le eventuali intersezioni con le due basi a quota minima e massima (solo se linea non parallela ad esse)
    int nBasInt = 0 ;
    if ( abs( vtV.z) > EPS_ZERO) {
-      ptInt1 = ptP + ( ( dMinH - ptP.z) / vtV.z) * vtV ;
+      ptInt1 = ptP + ( ( dMinH + dEpsLow - ptP.z) / vtV.z) * vtV ;
       if ( ptInt1.x * ptInt1.x + ptInt1.y * ptInt1.y < dMinRad * dMinRad + 2 * dMinRad * dTan * dEpsLow) {
          nBasInt += 1 ;
          vtN1 = Z_AX ;
       }
-      ptInt2 = ptP + ( ( dMaxH - ptP.z) / vtV.z) * vtV ;  
+      ptInt2 = ptP + ( ( dMaxH + dEpsUp - ptP.z) / vtV.z) * vtV ;  
       if ( ptInt2.x * ptInt2.x + ptInt2.y * ptInt2.y < dMaxRad * dMaxRad + 2 * dMaxRad * dTan * dEpsUp) {
          nBasInt += 2 ;
          vtN2 = - Z_AX ;
diff --git a/VolZmapVolume.cpp b/VolZmapVolume.cpp
index 3b1f497..ebeeaec 100644
--- a/VolZmapVolume.cpp
+++ b/VolZmapVolume.cpp
@@ -3208,7 +3208,7 @@ VolZmap::GenTool_Milling( int nGrid, const Point3d& ptS, const Point3d& ptE, con
                   bTapT = false ;
             }
            // verifiche curva successiva per eventuale tappo sotto
-            bool bTapB = false ;
+            bool bTapB = true ;
             const ICurve* pNextCurve = ToolProfile.GetCurve( ++ i) ;
             if ( pNextCurve != nullptr  &&  pNextCurve->GetType() == CRV_LINE) {
                const ICurveLine* pOthLine = GetCurveLine( pNextCurve) ;
@@ -4371,7 +4371,7 @@ VolZmap::CompConus_Milling( int nGrid, const Point3d& ptS, const Point3d& ptE, c
                }
                SubtractIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, nToolNum) ;
             }
-         
+
            // Cono finale
             ConusFrame.ChangeOrig( ptV + vtMove) ;
             if ( IntersLineConus( ptC, Z_AX, ConusFrame, dTan, dl, dL, bTapB, bTapT, ptInt1, vtN1, ptInt2, vtN2)) {