diff --git a/SurfRoughing.cpp b/SurfRoughing.cpp
index 2c89a1a..615278a 100644
--- a/SurfRoughing.cpp
+++ b/SurfRoughing.cpp
@@ -1401,12 +1401,12 @@ SurfRoughing::ProcessPath( int nPathId, int nTempId, int nPvId, int nClId)
             m_pMchMgr->SetLastError( 3024, "Error in SurfRoughing : region not computable") ;
             return false ;
          }
-         pSfr->Translate( it->dDepth * vtTool) ;
+         pSfr->Translate( ( it->dDepth - GetOffsL()) * vtTool) ;
 
         /* ******************** Regione adattata al grezzo ******************** */
         // questa regione bisogna ridurla basandosi sulla geometria del grezzo, in modo da non lavorare
         // parti in eccesso ; taglio il grezzo sul piano corrente e interseco con questa regione
-         PtrOwner<ISurfFlatRegion> pSfrRaw( GetSfrByStmIntersection( IPPStm, it->dDepth, 0)) ;
+         PtrOwner<ISurfFlatRegion> pSfrRaw( GetSfrByStmIntersection( IPPStm, it->dDepth - GetOffsL(), 0)) ;
          if ( IsNull( pSfrRaw)) {
             m_pMchMgr->SetLastError( 3027, "Error in SurfRoughing : Slicing Raw failed") ;
             return false ;