diff --git a/GenMachining.cpp b/GenMachining.cpp
index f1b587a..5943244 100644
--- a/GenMachining.cpp
+++ b/GenMachining.cpp
@@ -970,7 +970,7 @@ GenMachining::ProcessPath( int nPathId, int nPvId, int nClId)
 
   // recupero il box del grezzo in globale
    BBox3d b3Raw ;
-   if ( ! GetRawGlobBox( m_nPhase, nPathId, b3Raw)  ||  b3Raw.IsEmpty()) {
+   if ( ! GetRawGlobBox( m_nPhase, nPathId, 0.5 * m_TParams.m_dDiam, b3Raw)  ||  b3Raw.IsEmpty()) {
       LOG_INFO( GetEMkLogger(), "Error in GenMachining : Empty RawBox") ;
       return false ;
    }
diff --git a/Milling.cpp b/Milling.cpp
index 9a4cfb3..66a0186 100644
--- a/Milling.cpp
+++ b/Milling.cpp
@@ -1146,7 +1146,7 @@ Milling::ProcessPath( int nPathId, int nPvId, int nClId)
 
   // recupero il box del grezzo in globale
    BBox3d b3Raw ;
-   if ( ! GetRawGlobBox( m_nPhase, nPathId, b3Raw)  ||  b3Raw.IsEmpty()) {
+   if ( ! GetRawGlobBox( m_nPhase, nPathId, 0.5 * m_TParams.m_dDiam, b3Raw)  ||  b3Raw.IsEmpty()) {
       LOG_INFO( GetEMkLogger(), "Error in Milling : Empty RawBox") ;
       return false ;
    }
diff --git a/Operation.cpp b/Operation.cpp
index 4ada86a..2852c42 100644
--- a/Operation.cpp
+++ b/Operation.cpp
@@ -358,7 +358,7 @@ Operation::GetDistanceFromRawBottom( int nPhase, int nPathId, double dToler, dou
 
 //----------------------------------------------------------------------------
 bool
-Operation::GetRawGlobBox( int nPhase, int nPathId, BBox3d& b3Raw)
+Operation::GetRawGlobBox( int nPhase, int nPathId, double dToler, BBox3d& b3Raw)
 {
    if ( m_pMchMgr == nullptr  ||  m_pGeomDB == nullptr)
       return false ;
@@ -368,7 +368,7 @@ Operation::GetRawGlobBox( int nPhase, int nPathId, BBox3d& b3Raw)
    BBox3d b3Compo ;
    if ( ! m_pGeomDB->GetGlobalBBox( nPathId, b3Compo))
       return false ;
-   b3Compo.Expand( 10 * EPS_SMALL, 10 * EPS_SMALL, 0) ;
+   b3Compo.Expand( dToler, dToler, 0) ;
    int nRawId = m_pMchMgr->GetFirstRawPart() ;
    while ( nRawId != GDB_ID_NULL) {
      // verifico che il grezzo compaia nella fase
diff --git a/Operation.h b/Operation.h
index 297d960..a975dca 100644
--- a/Operation.h
+++ b/Operation.h
@@ -64,7 +64,7 @@ class Operation : public IUserObj
                            const Vector3d& vtDir, double dRad, double& dElev) ;
       bool   GetDistanceFromRawSide( int nPhase, const Point3d& ptP, const Vector3d& vtDir, double& dDist) ;
       bool   GetDistanceFromRawBottom( int nPhase, int nPathId, double dToler, double& dRbDist) ;
-      bool   GetRawGlobBox( int nPhase, int nPathId, BBox3d& b3Raw) ;
+      bool   GetRawGlobBox( int nPhase, int nPathId, double dToler, BBox3d& b3Raw) ;
      
       bool   GetInitialAxesValues( DBLVECTOR& vAxVal) ;
       bool   GetClPathInitialAxesValues( int nClPathId, DBLVECTOR& vAxVal) ;
diff --git a/SawFinishing.cpp b/SawFinishing.cpp
index d74fbfe..93121ef 100644
--- a/SawFinishing.cpp
+++ b/SawFinishing.cpp
@@ -797,7 +797,7 @@ SawFinishing::CalculateAlongToolPath( int nAuxId, int nClId)
 
   // recupero il box del grezzo in globale
    BBox3d b3Raw ;
-   if ( ! GetRawGlobBox( m_nPhase, nGuideId, b3Raw)  ||  b3Raw.IsEmpty()) {
+   if ( ! GetRawGlobBox( m_nPhase, nGuideId, 2 * m_TParams.m_dThick, b3Raw)  ||  b3Raw.IsEmpty()) {
       LOG_INFO( GetEMkLogger(), "Error in SawFinishing : Empty RawBox") ;
       return false ;
    }
@@ -946,7 +946,7 @@ SawFinishing::CalculateAcrossToolPath( int nAuxId, int nClId)
 
   // recupero il box del grezzo in globale
    BBox3d b3Raw ;
-   if ( ! GetRawGlobBox( m_nPhase, nGuideId, b3Raw)  ||  b3Raw.IsEmpty()) {
+   if ( ! GetRawGlobBox( m_nPhase, nGuideId, 2 * m_TParams.m_dThick, b3Raw)  ||  b3Raw.IsEmpty()) {
       LOG_INFO( GetEMkLogger(), "Error in SawFinishing : Empty RawBox") ;
       return false ;
    }
@@ -1168,7 +1168,7 @@ SawFinishing::CalculateGuideLine( int nGuideId, Point3d& ptGdStart, Point3d& ptG
 
   // recupero il box del grezzo in globale
    BBox3d b3Raw ;
-   if ( ! GetRawGlobBox( m_nPhase, nGuideId, b3Raw)  ||  b3Raw.IsEmpty()) {
+   if ( ! GetRawGlobBox( m_nPhase, nGuideId, 2 * m_TParams.m_dThick, b3Raw)  ||  b3Raw.IsEmpty()) {
       LOG_INFO( GetEMkLogger(), "Error in SawFinishing : Empty RawBox") ;
       return false ;
    }
diff --git a/SawRoughing.cpp b/SawRoughing.cpp
index ea952dc..baaf7dc 100644
--- a/SawRoughing.cpp
+++ b/SawRoughing.cpp
@@ -783,7 +783,7 @@ SawRoughing::CalculateToolPath( int nAuxId, int nClId)
 
   // recupero il box del grezzo in globale e nel riferimento locale delle sezioni
    BBox3d b3Raw ;
-   if ( ! GetRawGlobBox( m_nPhase, nGuideId, b3Raw)  ||  b3Raw.IsEmpty()) {
+   if ( ! GetRawGlobBox( m_nPhase, nGuideId, 2 * m_TParams.m_dThick, b3Raw)  ||  b3Raw.IsEmpty()) {
       LOG_INFO( GetEMkLogger(), "Error in SawRoughing : Empty RawBox") ;
       return false ;
    }