diff --git a/EXE_MachMgr.cpp b/EXE_MachMgr.cpp
index 588597c..8fc6d5a 100644
--- a/EXE_MachMgr.cpp
+++ b/EXE_MachMgr.cpp
@@ -1165,12 +1165,22 @@ ExeSetMachiningGeometry( const SELVECTOR& vIds)
 
 //-----------------------------------------------------------------------------
 bool
-ExeApplyMachining( void)
+ExePreviewMachining( bool bRecalc)
 {
    GseContext* pGseCtx = GetCurrGseContext() ;
    VERIFY_CTX_MACHMGR( pGseCtx, false)
   // imposto la geometria alla lavorazione corrente
-   return pGseCtx->m_pMachMgr->MachiningApply() ;
+   return pGseCtx->m_pMachMgr->MachiningPreview( bRecalc) ;
+}
+
+//-----------------------------------------------------------------------------
+bool
+ExeApplyMachining( bool bRecalc)
+{
+   GseContext* pGseCtx = GetCurrGseContext() ;
+   VERIFY_CTX_MACHMGR( pGseCtx, false)
+  // imposto la geometria alla lavorazione corrente
+   return pGseCtx->m_pMachMgr->MachiningApply( bRecalc) ;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 0a7c70a..3e9339a 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_MachMgr.cpp b/LUA_MachMgr.cpp
index c196754..9c9f2b4 100644
--- a/LUA_MachMgr.cpp
+++ b/LUA_MachMgr.cpp
@@ -1379,14 +1379,31 @@ LuaSetMachiningGeometry( lua_State* L)
    return 1 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaPreviewMachining( lua_State* L)
+{
+  // 1 o nessun parametro : [bRecalc]
+   bool bRecalc = false ;
+   LuaGetParam( L, 1, bRecalc) ;
+   LuaClearStack( L) ;
+  // calcolo l'anteprima (se prevista) della lavorazione corrente
+   bool bOk = ExePreviewMachining( bRecalc) ;
+  // restituisco il risultato
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
 //-------------------------------------------------------------------------------
 static int
 LuaApplyMachining( lua_State* L)
 {
-  // nessun parametro
+  // 1 o nessun parametro : [bRecalc]
+   bool bRecalc = false ;
+   LuaGetParam( L, 1, bRecalc) ;
    LuaClearStack( L) ;
-  // imposto la geometria alla lavorazione corrente
-   bool bOk = ExeApplyMachining() ;
+  // calcolo la lavorazione corrente
+   bool bOk = ExeApplyMachining( bRecalc) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;
@@ -1911,6 +1928,7 @@ LuaInstallMachMgr( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSetCurrMachining", LuaSetCurrMachining) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSetMachiningParam", LuaSetMachiningParam) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSetMachiningGeometry", LuaSetMachiningGeometry) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtPreviewMachining", LuaPreviewMachining) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtApplyMachining", LuaApplyMachining) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtGetMachiningParam", LuaGetMachiningParam) ;
    // Simulation