diff --git a/LuaLibs/ProcessLongCut.lua b/LuaLibs/ProcessLongCut.lua
index 6219672..e6cd8b7 100644
--- a/LuaLibs/ProcessLongCut.lua
+++ b/LuaLibs/ProcessLongCut.lua
@@ -1,4 +1,4 @@
--- ProcessLongCut.lua by Egaltech s.r.l. 2023/05/03
+-- ProcessLongCut.lua by Egaltech s.r.l. 2023/05/19
 -- Gestione calcolo taglio longitudinale per Travi
 -- 2021/02/03 Corretto FaceUse con fresa orizzontale su taglio orizzontale.
 -- 2021/05/18 Possibile taglio con lama anche di fianco su macchina con testa da sotto.
@@ -27,6 +27,7 @@
 -- 2023/03/22 Correzione a SCC lama a seguito di modifiche alle direzioni dei tagli.
 -- 2023/04/17 Gestione unificata SCC tramite funzione apposita GetSCC
 -- 2023/05/03 Corretto SCC in caso di asse utensile allineato con Z.
+-- 2023/05/19 Migliorato calcolo e verifica affondamento per lavorazione con lama con codolo in mezzo.
 
 -- Tabella per definizione modulo
 local ProcessLongCut = {}
@@ -725,11 +726,12 @@ function ProcessLongCut.Make( Proc, nPhase, nRawId, nPartId, bCustUseBlade, nCus
       local dToolDiam = 0
       local dThick = 0
       local dMaxDepth = 0
+      local dMaxVertDepth = 0
       local sCuttingDn
       local dToolDiamDn = 0
       local dThickDn = 0
       local dMaxDepthDn = 0
-      -- recupero la lavorazione
+      -- recupero eventuale lavorazione con lama su testa da sotto 
       if bCanUseUnderBlade then
          sCuttingDn = ML.FindCutting( 'HeadSide_H2', false, true)
          if not sCuttingDn then
@@ -747,6 +749,7 @@ function ProcessLongCut.Make( Proc, nPhase, nRawId, nPartId, bCustUseBlade, nCus
             end
          end
       end
+      -- recupero eventuale lavorazione con lama
       if bCanUseBlade then
          local sCutType = EgtIf( BD.USE_LONGCUT, 'LongCut', 'HeadSide')
          sCutting = ML.FindCutting( sCutType)
@@ -762,6 +765,7 @@ function ProcessLongCut.Make( Proc, nPhase, nRawId, nPartId, bCustUseBlade, nCus
                dToolDiam = EgtTdbGetCurrToolParam( MCH_TP.DIAM) or dToolDiam
                dThick = EgtTdbGetCurrToolParam( MCH_TP.THICK) or dThick
                dMaxDepth = EgtTdbGetCurrToolMaxDepth() or dMaxDepth
+               dMaxVertDepth = dMaxDepth - ( BD.DECR_VERT_CUT or 0)
             end
          end
       end
@@ -916,25 +920,23 @@ function ProcessLongCut.Make( Proc, nPhase, nRawId, nPartId, bCustUseBlade, nCus
       end
       -- si percorrono i lati alto e basso della faccia
       -- calcolo quanto è l'affondamento del taglio
-      local dOffsetTopBlade = ( dWidth + dDimStrip) / 2
-      local dOffsetDownBlade = ( dWidth + dDimStrip) / 2
-      if bFinishWithChainSaw then
-         dOffsetTopBlade = dWidth / 2
-         dOffsetDownBlade = dWidth / 2
-      end
+      local dMainMaxDepth = EgtIf( abs( vtN:getY()) < 1e-6, dMaxDepth, dMaxVertDepth)
+      local dOtherMaxDept = EgtIf( bCanUseUnderBlade, dMaxDepthDn, dMainMaxDepth)
+      local dCoeff = min( ( dWidth - dDimStrip) / ( dMainMaxDepth + dOtherMaxDept), 1)
+      local dOffsetTopBlade = dWidth - dCoeff * dMainMaxDepth
+      local dOffsetDownBlade = dWidth - dCoeff * dOtherMaxDept
       local nStepDownBlade = 1
-      local dStepDownBlade = dWidth - dOffsetDownBlade
+      local dStepDownBlade = dOtherMaxDept
       -- se lama da sotto verifico se la componente Y della profondità di taglio supera la capacità della lama
-      if ( nSide == -1 or abs(nSide) == 2) and bCanUseUnderBlade and (( dWidth - dDimStrip) / 2) > dMaxDepthDn then
+      if ( nSide == -1 or abs(nSide) == 2) and bCanUseUnderBlade and ( dOffsetTopBlade - dDimStrip) > dOtherMaxDept then
          if bFinishWithChainSaw then
-            dOffsetTopBlade = max( dWidth - dMaxDepth + ( BD.DECR_VERT_CUT or 0), dOffsetTopBlade)
-            dOffsetDownBlade = max( dWidth - dMaxDepthDn, dOffsetDownBlade)
             local dHCutDownBlade = dWidth - dOffsetDownBlade
-            local dMaxStepDownBlade = 64
+            local dMaxStepDownBlade = 80
             nStepDownBlade = ceil( dHCutDownBlade / dMaxStepDownBlade)
             dStepDownBlade = dHCutDownBlade / nStepDownBlade
          else
-            local sErr = 'Error : side depth is bigger than underneath blade cut depth'
+            local dDelta = dWidth - dDimStrip - ( dMainMaxDepth + dOtherMaxDept)
+            local sErr = 'Error : side depth is bigger than total cut depth (Diff=' .. EgtNumToString( dDelta)..')'
             EgtOutLog( sErr)
             return false, sErr
          end
diff --git a/LuaLibs/ProcessLongDoubleCut.lua b/LuaLibs/ProcessLongDoubleCut.lua
index a433879..797720a 100644
--- a/LuaLibs/ProcessLongDoubleCut.lua
+++ b/LuaLibs/ProcessLongDoubleCut.lua
@@ -125,9 +125,9 @@ function ProcessLong2Cut.GetLongFacesCount( Proc)
 end
 
 ---------------------------------------------------------------------
-local function MakeSideFace( nId, nFac, nSideLimitingFace, sMilling, dToolDiam, nL2CSide, bIsAnyFaceUpsideDown)
-   if ( not BD.DOWN_HEAD or not BD.TURN) and bIsAnyFaceUpsideDown then
-      EgtOutLog( 'Long2Cut : side face finishing skipped , down head required')
+local function MakeSideFace( nId, nFac, nSideLimitingFace, nInd, sMilling, dToolDiam, nL2CSide, bIsAnyFaceUpsideDown)
+   if ( not BD.DOWN_HEAD and not BD.TURN) and bIsAnyFaceUpsideDown then
+      EgtOutLog( 'Long2Cut : side face finishing skipped, down head required')
       return true
    end
    -- inserisco la lavorazione
@@ -141,8 +141,15 @@ local function MakeSideFace( nId, nFac, nSideLimitingFace, sMilling, dToolDiam,
    -- aggiungo geometria
    EgtSetMachiningGeometry( {{ nId, nFac}})
    -- lato di lavoro e inversione
-   EgtSetMachiningParam( MCH_MP.INVERT, false)
-   EgtSetMachiningParam( MCH_MP.WORKSIDE, MCH_MILL_WS.LEFT)
+   if BD.TURN and
+      ( ( nSideLimitingFace == 1 and nInd == EgtIf( nL2CSide ~= -1, 2, 1)) or
+        ( nSideLimitingFace == -1 and nInd == EgtIf( nL2CSide ~= -1, 1, 2))) then
+      EgtSetMachiningParam( MCH_MP.INVERT, true)
+      EgtSetMachiningParam( MCH_MP.WORKSIDE, MCH_MILL_WS.RIGHT)
+   else
+      EgtSetMachiningParam( MCH_MP.INVERT, false)
+      EgtSetMachiningParam( MCH_MP.WORKSIDE, MCH_MILL_WS.LEFT)
+   end
    -- uso della faccia
    local nFaceUse = EgtIf( nSideLimitingFace == 1, MCH_MILL_FU.ORTHO_RIGHT, MCH_MILL_FU.ORTHO_LEFT)
    EgtSetMachiningParam( MCH_MP.FACEUSE, nFaceUse)
@@ -151,8 +158,11 @@ local function MakeSideFace( nId, nFac, nSideLimitingFace, sMilling, dToolDiam,
    -- attacco e uscita
    EgtSetMachiningParam( MCH_MP.LIPERP, 0)
    EgtSetMachiningParam( MCH_MP.LITANG, dToolDiam / 2 + 30)
-   EgtSetMachiningParam( MCH_MP.LOPERP, 2)
+   EgtSetMachiningParam( MCH_MP.LOPERP, 5)
    EgtSetMachiningParam( MCH_MP.LOTANG, 10)
+   if BD.TURN then
+      EgtSetMachiningParam( MCH_MP.LOELEV, 10)
+   end
    -- se faccia di fianco e testa da sotto, aumento la sicurezza
    if nL2CSide == 0 and BD.DOWN_HEAD then
        EgtSetMachiningParam( MCH_MP.STARTPOS, 80)
@@ -1095,6 +1105,9 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
             local nPos = EgtIf( i == 1, j, nC - j + 1)
             local dSal = EgtIf( nPos == 1, - EgtIf( i == nIni, dStartDist, dEndDist), - EgtIf( i == nIni, dStartAccDist, dEndAccDist) - ( nPos - 2) * dC + EgtIf( bSide, dOverLapExtend, 0))
             local dEal = EgtIf( nPos == nC, - EgtIf( i == nIni, dEndDist, dStartDist), - EgtIf( i == nIni, dEndAccDist, dStartAccDist) - ( nC - nPos - 1) * dC + EgtIf( bSide, dOverLapExtend, 0))
+            if nSide == -1 then
+               dSal, dEal = dEal, dSal
+            end
             -- Posizione braccio portatesta
             local nSCC = MCH_SCC.NONE
             if not BD.C_SIMM then
@@ -1178,11 +1191,11 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
             end
             -- se facce principali convesse, eventuale lavorazione della faccia limitante l'inizio (a destra)
             if bConvex and j == 1 and not bStartFixed then
-               MakeSideFace( Proc.Id, tFaceLong[vOrd[i]], 1, sMilling, dToolDiam, nSide, bIsAnyFaceUpsideDown)
+               MakeSideFace( Proc.Id, tFaceLong[vOrd[i]], 1, i, sMilling, dToolDiam, nSide, bIsAnyFaceUpsideDown)
             end
             -- se facce principali convesse, eventuale lavorazione della faccia limitante la fine (a sinistra)
             if bConvex and j == nC and not bEndFixed then
-               MakeSideFace( Proc.Id, tFaceLong[vOrd[i]], -1, sMilling, dToolDiam, nSide, bIsAnyFaceUpsideDown)
+               MakeSideFace( Proc.Id, tFaceLong[vOrd[i]], -1, i, sMilling, dToolDiam, nSide, bIsAnyFaceUpsideDown)
             end
          end
       end
@@ -1620,11 +1633,11 @@ function ProcessLong2Cut.Make( Proc, nPhase, nRawId, nPartId, bForcedBladeMaster
             end
             -- se facce principali convesse, eventuale lavorazione della faccia limitante l'inizio (a destra)
             if bConvex and j == 1 and not bStartFixed and bRemoveToolRadius then
-               MakeSideFace( Proc.Id, tFaceLong[vOrd[i]], 1, sMilling, dToolDiam)
+               MakeSideFace( Proc.Id, tFaceLong[vOrd[i]], 1, i, sMilling, dToolDiam)
             end
             -- se facce principali convesse, eventuale lavorazione della faccia limitante la fine (a sinistra)
             if bConvex and j == nC and not bEndFixed and bRemoveToolRadius then
-               MakeSideFace( Proc.Id, tFaceLong[vOrd[i]], -1, sMilling, dToolDiam)
+               MakeSideFace( Proc.Id, tFaceLong[vOrd[i]], -1, i, sMilling, dToolDiam)
             end
          end
       end