diff --git a/LuaLibs/BeamLib.lua b/LuaLibs/BeamLib.lua
index c28d59f..8b0e56f 100644
--- a/LuaLibs/BeamLib.lua
+++ b/LuaLibs/BeamLib.lua
@@ -870,15 +870,19 @@ function BeamLib.MakeOneFaceBySaw( nSurfId, nFacet, sCutting, dSawDiam, Par5, dV
       local dDist1 = dist( ptP1, ptPm)
       local dDist2 = dist( ptP2, ptPm)
       local dCosMax = 0.951       -- cos( 18°)
-      local dLenMin = 2
-      local dLenMax = 0.5 * dSawDiam * 0.17365 + 1
+      local dLenMin = 30
+      local dLenMax = max( 0.5 * dSawDiam * 0.17365 + 1, 2 * dLenMin)
       if vtTg1 * vtTg2 < dCosMax or ( dDist1 < dLenMax and dDist1 > dLenMin) or ( dDist2 < dLenMax and dDist2 > dLenMin) then 
          if abs( vtTg1 * vtOrthO) < abs( vtTg2 * vtOrthO) then
-            ptP2 = Point3d( ptPm)
-            dAllEnd = - dDist2 - 10 * GEO.EPS_SMALL
+            if dDist1 > dLenMin or dDist1 > 0.5 * dDist2 then
+               ptP2 = Point3d( ptPm)
+               dAllEnd = - dDist2 - 10 * GEO.EPS_SMALL
+            end
          else
-            ptP1 = Point3d( ptPm)
-            dAllStart = - dDist1 - 10 * GEO.EPS_SMALL
+            if dDist2 > dLenMin or dDist2 > 0.5 * dDist1 then
+               ptP1 = Point3d( ptPm)
+               dAllStart = - dDist1 - 10 * GEO.EPS_SMALL
+            end
          end
          vtTg = ptP2 - ptP1 ;   vtTg:normalize()
       end