diff --git a/LuaLibs/ProcessLapJoint.lua b/LuaLibs/ProcessLapJoint.lua
index 2b8ff49..461aaa3 100644
--- a/LuaLibs/ProcessLapJoint.lua
+++ b/LuaLibs/ProcessLapJoint.lua
@@ -3290,15 +3290,27 @@ local function MachineByMill( Proc, nPhase, nRawId, nPartId, b3Solid, tvtN, nBas
             EgtSetMachiningParam( MCH_MP.STARTADDLEN, dTDiam / 2)
          else
             EgtSetMachiningParam( MCH_MP.STARTADDLEN, -dTDiam / 2)
+            -- forzo attacco lineare
             if dElev > 0 then
+               EgtSetMachiningParam( MCH_MP.LEADINTYPE, MCH_MILL_LI.LINEAR)
+               EgtSetMachiningParam( MCH_MP.LEADOUTTYPE, MCH_MILL_LI.LINEAR)
+               EgtSetMachiningParam( MCH_MP.LITANG, 0)
+               EgtSetMachiningParam( MCH_MP.LOTANG, 0)
                EgtSetMachiningParam( MCH_MP.LIPERP, dElev)
+               EgtSetMachiningParam( MCH_MP.LOPERP, dElev)
             end
          end
          if bOpenEnd then
             EgtSetMachiningParam( MCH_MP.ENDADDLEN, dTDiam / 2)
          else
             EgtSetMachiningParam( MCH_MP.ENDADDLEN, -dTDiam / 2)
+            -- forzo attacco lineare
             if dElev > 0 then
+               EgtSetMachiningParam( MCH_MP.LEADINTYPE, MCH_MILL_LI.LINEAR)
+               EgtSetMachiningParam( MCH_MP.LEADOUTTYPE, MCH_MILL_LI.LINEAR)
+               EgtSetMachiningParam( MCH_MP.LITANG, 0)
+               EgtSetMachiningParam( MCH_MP.LOTANG, 0)
+               EgtSetMachiningParam( MCH_MP.LIPERP, dElev)
                EgtSetMachiningParam( MCH_MP.LOPERP, dElev)
             end
          end