diff --git a/Icarus/TopPanel/TopPanelVM.vb b/Icarus/TopPanel/TopPanelVM.vb
index 1cc2315..966a0b5 100644
--- a/Icarus/TopPanel/TopPanelVM.vb
+++ b/Icarus/TopPanel/TopPanelVM.vb
@@ -274,7 +274,27 @@ Public Class TopPanelVM
             WriteMainPrivateProfileString(S_PRINTING3D, K_CURRMACHINING, value.sGUID.ToString())
             ' imposto selezionata come corrente
             If Not IsNothing(m_SelPart) AndAlso (IsNothing(m_SelMachining) OrElse value.sGUID <> m_SelMachining.sGUID) Then
+               Dim GeneralCathegory As MachiningCathegory = Map.refTopPanelVM.CurrMachining.CathegoryList.FirstOrDefault(Function(x) x.Type = MachiningCathegory.Cathegories.GENERAL)
+               Dim OldSlicingTypeValue As Machining.MPAR_SLICINGTYPE = Nothing
+               Dim NewSlicingTypeValue As Machining.MPAR_SLICINGTYPE = Nothing
+               If Not IsNothing(GeneralCathegory) Then
+                  Dim SlicingTypeParam As ComboMachiningParam = GeneralCathegory.MachiningParamList.FirstOrDefault(Function(x) x.Type = MachiningParam.Params.SLICINGTYPE)
+                  If Not IsNothing(SlicingTypeParam) Then
+                     OldSlicingTypeValue = SlicingTypeParam.SelValue.Id
+                  End If
+               End If
                Map.refCurrMachiningPanelVM.SetCurrMachining(New CurrMachining(m_SelPart.nPartId, value.nIndex))
+               GeneralCathegory = Map.refTopPanelVM.CurrMachining.CathegoryList.FirstOrDefault(Function(x) x.Type = MachiningCathegory.Cathegories.GENERAL)
+               If Not IsNothing(GeneralCathegory) Then
+                  Dim SlicingTypeParam As ComboMachiningParam = GeneralCathegory.MachiningParamList.FirstOrDefault(Function(x) x.Type = MachiningParam.Params.SLICINGTYPE)
+                  If Not IsNothing(SlicingTypeParam) Then
+                     NewSlicingTypeValue = SlicingTypeParam.SelValue.Id
+                  End If
+               End If
+               If IsNothing(OldSlicingTypeValue) OrElse IsNothing(NewSlicingTypeValue) OrElse OldSlicingTypeValue <> NewSlicingTypeValue Then
+                  ' aggiorno area di estrusione
+                  CurrentMachine.UpdateExtrusionArea()
+               End If
             End If
          End If
          m_SelMachining = value