diff --git a/LuaLibs/ProcessCut.lua b/LuaLibs/ProcessCut.lua
index ec2699c..bf30107 100644
--- a/LuaLibs/ProcessCut.lua
+++ b/LuaLibs/ProcessCut.lua
@@ -322,7 +322,8 @@ local function MakeFromTop( sCutting, Proc, nPhase, nRawId, nPartId, dOvmHead, b
    local dMaxVertDepth = dMaxDepth - ( BD.DECR_VERT_CUT or 0)
    -- determino la direzione di taglio preferenziale
    local frFac, dCutH, dCutV = BL.GetFaceHvRefDim( Proc.Id, 0, b3Raw)
-   local bHorizCut = ( dCutV < dMaxVertDepth - BD.CUT_EXTRA and not bDownCut)
+   local bHorizCut = ( dCutV < dMaxVertDepth - BD.CUT_EXTRA and not bDownCut) or
+                     ( dCutV < 0.8 * dMaxVertDepth - BD.CUT_EXTRA and b3Solid:getDimZ() < 0.8 * dMaxVertDepth - BD.CUT_EXTRA)
    local bVertCutOk = ( dCutH < dMaxDepth - BD.CUT_EXTRA)
    -- recupero gruppo per geometria addizionale
    local nAddGrpId = BL.GetAddGroup( nPartId)
@@ -467,7 +468,7 @@ local function MakeFromTop( sCutting, Proc, nPhase, nRawId, nPartId, dOvmHead, b
       local vtOrthoO
       if bFromBottom and dCutV < dMaxVertDepth - BD.CUT_EXTRA and vtN:getZ() > 0 then
          vtOrthoO = -Z_AX()
-      elseif bHorizCut and ( not bVertCutOk or b3Solid:getDimX() > BD.LEN_SHORT_PART or Proc.AdvTail or vtN:getX() > 0) then
+      elseif bHorizCut and ( not bVertCutOk or b3Solid:getDimX() > BD.LEN_SHORT_PART or Proc.AdvTail or vtN:getX() > 0 or ( abs( vtN:getY()) < 0.1 and vtN:getZ() <= 0)) then
          vtOrthoO = Z_AX()
       elseif b3Solid:getDimX() < BD.LEN_SHORT_PART and not Proc.AdvTail and abs( vtN:getY()) > 0.259 and
              vtN:getZ() > -0.174 and abs( vtN:getY()) > abs( vtN:getZ()) and dCutH < dMaxDepth + 10 * GEO.EPS_SMALL then