diff --git a/LuaLibs/AddManData.lua b/LuaLibs/AddManData.lua
index 1709475..5356af9 100644
--- a/LuaLibs/AddManData.lua
+++ b/LuaLibs/AddManData.lua
@@ -178,6 +178,7 @@ KEY_AUX_SOLIDS_WIPE_DIR = "AuxSolidsWipeDir"
 
 -- Parametri di macchina
 SEC_3DPRINTING = "3dPrinting"
+KEY_HORIZ_EXTR = "HorizExtrusion"
 KEY_COEFF_X = "CoeffX"
 KEY_COEFF_Y = "CoeffY"
 KEY_SPEED_MIN = "SpeedMin"
diff --git a/LuaLibs/RunGcodeGenerate.lua b/LuaLibs/RunGcodeGenerate.lua
index 2ebd2b5..88c760a 100644
--- a/LuaLibs/RunGcodeGenerate.lua
+++ b/LuaLibs/RunGcodeGenerate.lua
@@ -33,6 +33,7 @@ function RunGcodeGenerate.Exec()
       EgtOutBox( 'Error missing part', 'GcodeGenerate')
       return 
    end
+   local nSlicingType = EgtGetInfo( nPartId, KEY_SLICING_TYPE, 'i')
 
    -- Recupero i layer da processare
    local vLayIds = EgtGetNameInGroup( nPartId, SLICE_LAYER.."*") 
@@ -89,8 +90,15 @@ function RunGcodeGenerate.Exec()
    -- Rimuovo eventuali precedenti lavorazioni
    EgtRemoveAllOperations()
 
+   -- Determino lavorazione di libreria
+   local sExtrName = 'Extrusion'
+   if nSlicingType == SLICING_TYPE.HORIZONTAL then
+      local sMachIni = EgtGetCurrMachineDir() .. '\\' .. EgtGetCurrMachineName() .. '.ini'
+      sExtrName = EgtGetStringFromIni( SEC_3DPRINTING, KEY_HORIZ_EXTR, sExtrName, sMachIni)
+   end
+
    -- Aggiungo la lavorazione
-   local nMchId = EgtAddMachining( 'Extrusion 1', 'Extrusion')
+   local nMchId = EgtAddMachining( 'Extrusion 1', sExtrName)
    if not nMchId then
       EgtOutBox( 'Error adding Extrusion', 'GcodeGenerate')
       return