diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index 01e3d38..a59b382 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/Operation.cpp b/Operation.cpp
index 748b2f8..ebe96f1 100644
--- a/Operation.cpp
+++ b/Operation.cpp
@@ -2042,17 +2042,33 @@ Operation::AdjustOneStartMovement( int nClPathId, int nPrevClPathId, Operation*
          double dHomeZ ;
          if ( ! m_pMchMgr->GetCurrAxisHomePos( 2, dHomeZ))
             return false ;
-        // riprovo con una Z intermedia
+         bool bPartRise = false ;
          double dSafeZ = dHomeZ ;
-         double dUnsafeZ = dTopZ ;
-         for ( int i = 1 ; i <= 3 ; ++ i) {
-            double dTestSafeZ = ( dUnsafeZ + dSafeZ) / 2 ;
-            vAxPrevTmp[2] = dTestSafeZ ;
-            vAxCurrTmp[2] = dTestSafeZ ;
-            if ( ! bForcedZMax  &&  TestCollisionAvoid( vAxPrevTmp, vAxCurrTmp))
-               dSafeZ = dTestSafeZ ;
-            else
-               dUnsafeZ = dTestSafeZ ;
+        // se non forzata Zmax
+         if ( ! bForcedZMax) {
+           // riprovo con una Z intermedia
+            double dUnsafeZ = dTopZ ;
+            for ( int i = 1 ; i <= 3 ; ++ i) {
+               double dTestSafeZ = ( dUnsafeZ + dSafeZ) / 2 ;
+               vAxPrevTmp[2] = dTestSafeZ ;
+               vAxCurrTmp[2] = dTestSafeZ ;
+               if ( TestCollisionAvoid( vAxPrevTmp, vAxCurrTmp)) {
+                  bPartRise = true ;
+                  dSafeZ = dTestSafeZ ;
+               }
+               else
+                  dUnsafeZ = dTestSafeZ ;
+            }
+           // se necessario, riprovo appena prima di Zmax
+            if ( ! bPartRise) {
+               double dOffsZ = 5 * ( bZHomeDown ? 1 : -1) ;
+               vAxPrevTmp[2] = dHomeZ + dOffsZ ;
+               vAxCurrTmp[2] = dHomeZ + dOffsZ ;
+               if ( TestCollisionAvoid( vAxPrevTmp, vAxCurrTmp)) {
+                  bPartRise = true ;
+                  dSafeZ = dHomeZ + dOffsZ ;
+               }
+            }
          }
         // risalita sopra fine percorso precedente
          DBLVECTOR vAxNew1 ;
@@ -2074,7 +2090,7 @@ Operation::AdjustOneStartMovement( int nClPathId, int nPrevClPathId, Operation*
          DBLVECTOR vAxNew = vAxCurr ;
          vAxNew[2] = vAxNew1[2] ;
          int nFlagNew = 2 ;
-         int nFlag2New = 1 ;
+         int nFlag2New = ( bPartRise ? 0 : 1) ;
         // eventuali aggiustamenti speciali dipendenti dalla macchina
          Vector3d vtTool = pCamData->GetToolDir() ;
          DBLVECTOR vAxTmp = vAxNew ;