diff --git a/LuaLibs/MachiningLib.lua b/LuaLibs/MachiningLib.lua
index 11c0429..23bc5de 100644
--- a/LuaLibs/MachiningLib.lua
+++ b/LuaLibs/MachiningLib.lua
@@ -394,7 +394,10 @@ local function TestEngagement( sBladeEngagement, Parameters, OptionalParameters)
    local bOutOfStrokeTangent = PreSimulationLib.CheckOutOfStrokeFromPoints( PointsOnToolTipCenter, vtHead, nSCC, Tool)
    -- attacco tangenziale non in extracorsa: si verifica se è in collisione
    if not bOutOfStrokeTangent then
-      local bCollisionFoundTangent, bMoveAfterSplitTangent = PreSimulationLib.CheckCollision( sBladeEngagement, CheckCollisionParameters, CheckCollisionOptionalParameters) -- TODO passare punti custom attacco tangenziale
+      CheckCollisionOptionalParameters.PointsToCheck = {}
+      table.insert( CheckCollisionOptionalParameters.PointsToCheck, TangentLeadInOut.LeadIn.ptPoint)
+      table.insert( CheckCollisionOptionalParameters.PointsToCheck, TangentLeadInOut.LeadOut.ptPoint)
+      local bCollisionFoundTangent, bMoveAfterSplitTangent = PreSimulationLib.CheckCollision( sBladeEngagement, CheckCollisionParameters, CheckCollisionOptionalParameters)
       -- attacco tangenziale possibile
       if not bCollisionFoundTangent then
          LeadInOut.Tangent = TangentLeadInOut