diff --git a/LuaLibs/ProcessHeadCut.lua b/LuaLibs/ProcessHeadCut.lua
index bcf61c6..26f2089 100644
--- a/LuaLibs/ProcessHeadCut.lua
+++ b/LuaLibs/ProcessHeadCut.lua
@@ -171,9 +171,9 @@ function ProcessHeadCut.Make( Proc, nPhase, nRawId, nPartId, dOvmHead, bNeedHCut
    local dMaxVertDepth = dMaxDepth - ( BD.DECR_VERT_CUT or 0)
    -- caratteristiche taglio
    local bHorizCut = ( b3Raw:getDimY() > b3Raw:getDimZ() + 10 * GEO.EPS_SMALL and b3Raw:getDimZ() < dMaxVertDepth - BD.CUT_EXTRA)
-   local dDimYRef = EgtIf( b3Raw:getDimZ() < BD.MIN_DIM_HBEAM + 10 * GEO.EPS_SMALL, dMaxDepth, BD.MAX_DIM_HTCUT_HBEAM)
+   local dDimYRef = EgtIf( b3Raw:getDimZ() < BD.MIN_DIM_HBEAM + 10 * GEO.EPS_SMALL, max( dMaxDepth, BD.MAX_DIM_HTCUT), BD.MAX_DIM_HTCUT_HBEAM)
    local bDoubleHorizCut = ( BD.DOWN_HEAD and not bHorizCut and b3Raw:getDimY() > 2 * dDimYRef - BD.CUT_EXTRA_MIN + 10 * GEO.EPS_SMALL)
-   local bDoubleCut = ( not bHorizCut and not bDoubleHorizCut and b3Raw:getDimY() > dDimYRef - BD.CUT_EXTRA + 10 * GEO.EPS_SMALL)
+   local bDoubleCut = ( not bHorizCut and not bDoubleHorizCut and b3Raw:getDimY() > dDimYRef - BD.CUT_EXTRA_MIN + 10 * GEO.EPS_SMALL)
    -- dati geometrici del taglio
    local ptC, vtN = EgtSurfTmFacetCenter( Proc.Id, 0, GDB_ID.ROOT)
    -- se non obbligatorio e coincide con inizio grezzo, non va fatto
@@ -192,7 +192,7 @@ function ProcessHeadCut.Make( Proc, nPhase, nRawId, nPartId, dOvmHead, bNeedHCut
       local dAccStart = 0
       local dAccEnd = 0
       if b3Raw:getDimZ() < BD.MIN_DIM_HBEAM + 10 * GEO.EPS_SMALL or b3Raw:getDimY() < 2 * BD.MAX_DIM_HTCUT_HBEAM + 10 * GEO.EPS_SMALL then
-         dCutExtra = EgtIf( bDoubleCut, - 0.5 * b3Raw:getDimY() + BD.CUT_EXTRA_MIN,  BD.CUT_EXTRA)
+         dCutExtra = EgtIf( bDoubleCut, - 0.5 * b3Raw:getDimY() + BD.CUT_EXTRA_MIN / 2,  BD.CUT_EXTRA)
       else
          dCutExtra = - ( b3Raw:getDimY() - dMaxDepth)
          local dSawRad = dSawDiam / 2
diff --git a/LuaLibs/ProcessSplit.lua b/LuaLibs/ProcessSplit.lua
index 631aa12..fc41898 100644
--- a/LuaLibs/ProcessSplit.lua
+++ b/LuaLibs/ProcessSplit.lua
@@ -171,9 +171,9 @@ function ProcessSplit.Make( Proc, nPhase, nRawId, nPartId)
    local dMaxVertDepth = dMaxDepth - ( BD.DECR_VERT_CUT or 0)
    -- caratteristiche taglio
    local bHorizCut = ( b3Raw:getDimY() > b3Raw:getDimZ() + 10 * GEO.EPS_SMALL and b3Raw:getDimZ() < dMaxVertDepth - BD.CUT_EXTRA)
-   local dDimYRef = EgtIf( b3Raw:getDimZ() < BD.MIN_DIM_HBEAM + 10 * GEO.EPS_SMALL, dMaxDepth, BD.MAX_DIM_HTCUT_HBEAM)
+   local dDimYRef = EgtIf( b3Raw:getDimZ() < BD.MIN_DIM_HBEAM + 10 * GEO.EPS_SMALL, max( dMaxDepth, BD.MAX_DIM_HTCUT), BD.MAX_DIM_HTCUT_HBEAM)
    local bDoubleHorizCut = ( BD.DOWN_HEAD and not bHorizCut and b3Raw:getDimY() > 2 * dDimYRef - BD.CUT_EXTRA_MIN + 10 * GEO.EPS_SMALL)
-   local bDoubleCut = ( not bHorizCut and b3Raw:getDimY() > dDimYRef - BD.CUT_EXTRA  + 10 * GEO.EPS_SMALL)
+   local bDoubleCut = ( not bHorizCut and b3Raw:getDimY() > dDimYRef - BD.CUT_EXTRA_MIN  + 10 * GEO.EPS_SMALL)
    -- dati geometrici del taglio
    local ptC, vtN = EgtSurfTmFacetCenter( Proc.Id, 0, GDB_ID.ROOT)
    -- flag di lavorazione faccia
@@ -202,7 +202,7 @@ function ProcessSplit.Make( Proc, nPhase, nRawId, nPartId)
       local dAccStart = 0
       local dAccEnd = 0
       if b3Raw:getDimZ() < BD.MIN_DIM_HBEAM + 10 * GEO.EPS_SMALL or b3Raw:getDimY() < 2 * BD.MAX_DIM_HTCUT_HBEAM + 10 * GEO.EPS_SMALL then
-         dCutExtra = EgtIf( bDoubleCut, - 0.5 * b3Raw:getDimY() + BD.CUT_EXTRA_MIN, BD.CUT_EXTRA)
+         dCutExtra = EgtIf( bDoubleCut, - 0.5 * b3Raw:getDimY() + BD.CUT_EXTRA_MIN / 2, BD.CUT_EXTRA)
       else
          dCutExtra = - ( b3Raw:getDimY() - dMaxDepth)
          local dSawRad = dSawDiam / 2