diff --git a/BatchProcessNew.lua b/BatchProcessNew.lua
index 3d32ed0..7496722 100644
--- a/BatchProcessNew.lua
+++ b/BatchProcessNew.lua
@@ -562,7 +562,7 @@ else
    -- Passo in modalità lavora
    EgtSetCurrMachGroup( EgtGetLastMachGroup())
    -- Se necessario eseguo aggiornamento con setup corrente e ricalcolo delle lavorazioni
-   if bToRecalc then
+   if bToRecalc or BEAM.FLAG == 3 or BEAM.FLAG == 4 then
       EgtOutLog( ' +++ Recalculating all dispositions and machinings >>>')
       EgtImportSetup()
       EgtApplyAllMachinings()
diff --git a/LuaLibs/ProcessLapJoint.lua b/LuaLibs/ProcessLapJoint.lua
index 697ff84..6a5921e 100644
--- a/LuaLibs/ProcessLapJoint.lua
+++ b/LuaLibs/ProcessLapJoint.lua
@@ -5411,6 +5411,11 @@ function SawPlusChain.Chainsaw.CalculateMachiningParameters( Proc, FaceToMachine
          EgtOutLog( Mortising.Message)
       end
    end
+   if EdgeToMachine.ToolDirection:getZ() < - 10 * GEO.EPS_ANG_SMALL then
+      Mortising.CanApply = false
+      Mortising.Message = 'Feature '.. Proc.FeatureId .. ' : skipped chainsaw from bottom'
+      EgtOutLog( Mortising.Message)
+   end
 
    -- parametri della lavorazione
    -- inizio e fine aperti o chiusi