diff --git a/LuaLibs/ProcessHeadCut.lua b/LuaLibs/ProcessHeadCut.lua
index c391ca4..7d0653f 100644
--- a/LuaLibs/ProcessHeadCut.lua
+++ b/LuaLibs/ProcessHeadCut.lua
@@ -157,8 +157,8 @@ end
 ---------------------------------------------------------------------
 -- tagli verticali aggiuntivi
 local function AddVerticalPreCuts( Proc, sCutting, dCutXOffset, b3Raw)
-   local nVerticalCuts = ceil( Proc.Face[1].HeightTrimmed / ( BD.MAX_LEN_DICE)) - 1
-   local dVerticalSliceHeight = Proc.Face[1].HeightTrimmed / ( nVerticalCuts + 1)
+   local nVerticalCuts = ceil( Proc.Face[1].WidthTrimmed / ( BD.MAX_LEN_DICE)) - 1
+   local dVerticalSliceHeight = Proc.Face[1].WidthTrimmed / ( nVerticalCuts + 1)
    -- recupero il diametro dell'utensile
    local dSawDiam = 400
    if EgtMdbSetCurrMachining( sCutting) then