diff --git a/LuaLibs/RunMachParamFromSWCalc.lua b/LuaLibs/RunMachParamFromSWCalc.lua
index e4883b9..60aafa6 100644
--- a/LuaLibs/RunMachParamFromSWCalc.lua
+++ b/LuaLibs/RunMachParamFromSWCalc.lua
@@ -189,8 +189,10 @@ function RunMachParamFromSWCalc.Exec()
             dLayerTime = dTotLayerLength / dLayerFeed * 60
          end
          dLayerWait = floor( dTMin + 0.5) - floor( dLayerTime + 0.5)
+         -- sezione dello strand
+         local dSect = max( ( dStrandMean - dSliceStep) * dSliceStep, 0) + pi * dSliceStep * dSliceStep / 4
          -- calcolo la portata
-         local Vf = dLayerFeed * ( ( dStrandMean - dSliceStep) * dSliceStep + pi * pow( dSliceStep / 2, 2)) / 1000
+         local Vf = dLayerFeed * dSect / 1000
          -- calcolo speed
          local dSpeed = ( MATERIAL.K_EXTRUSION / 100.0) * ( MACHINING.K / 100.0) * pow( Vf / MATERIAL.C1, 1 / MATERIAL.C2)
          -- verifico se speed esce da minimo e massimo della macchina
@@ -205,7 +207,7 @@ function RunMachParamFromSWCalc.Exec()
          end
          if not bSpeedOk then
             if dTotLayerLength > 0.1 then
-               dLayerFeed = ( MATERIAL.C1 * pow( ( dSpeed / (( MATERIAL.K_EXTRUSION / 100.0) * ( MACHINING.K / 100.0))), MATERIAL.C2)) * 1000 / ( ( dStrandMean - dSliceStep) * dSliceStep + pi * pow( dSliceStep / 2, 2))
+               dLayerFeed = ( MATERIAL.C1 * pow( ( dSpeed / (( MATERIAL.K_EXTRUSION / 100.0) * ( MACHINING.K / 100.0))), MATERIAL.C2)) * 1000 / dSect
                dLayerTime = dTotLayerLength / dLayerFeed * 60
             end
             dLayerWait = floor( dTMin + 0.5) - floor( dLayerTime + 0.5)
diff --git a/Version.lua b/Version.lua
index 7db19fb..f39b832 100644
--- a/Version.lua
+++ b/Version.lua
@@ -1,4 +1,4 @@
--- Version.lua by Egaltech s.r.l. 2024/05/06
+-- Version.lua by Egaltech s.r.l. 2025/09/12
 -- Gestione della versione di 3dPrinting
 
-VERSION = '2.7i1'
\ No newline at end of file
+VERSION = '2.7i2'
\ No newline at end of file