diff --git a/LuaLibs/ProcessLapJoint.lua b/LuaLibs/ProcessLapJoint.lua
index eba4031..c530a2e 100644
--- a/LuaLibs/ProcessLapJoint.lua
+++ b/LuaLibs/ProcessLapJoint.lua
@@ -1,4 +1,4 @@
--- ProcessLapJoint.lua by Egaltech s.r.l. 2019/11/12
+-- ProcessLapJoint.lua by Egaltech s.r.l. 2019/11/14
 -- Gestione calcolo mezzo-legno per Travi
 -- 2019/10/08 Agg. gestione OpenPocket.
 
@@ -485,28 +485,35 @@ local function MakeByChainOrSaw( Proc, nPhase, nRawId, nPartId, nFacInd, rfFac,
       return false, sErr
    end
    EgtOutLog( 'Adjac=' .. table.concat( vAdj, ','), 3)
-   -- Riordino le dimensioni per avere dH > dV
-   if dH < dV then
-      dH, dV = dV, dH
-   end
-   -- Cerco una faccia adiacente alla principale sul lato lungo
+   -- Cerco una faccia adiacente alla principale sul lato più lungo
    local nFacAdj
+   local dMaxLen = 0
    for i = 1, #vAdj do
       if vAdj[i] >= 0 then
          local _, ptP1, ptP2, _ = EgtSurfTmFacetsContact( Proc.Id, nFacInd, vAdj[i], GDB_ID.ROOT)
          local dLen = dist( ptP1, ptP2)
-         if dLen > 0.5 * dH then
+         if dLen > dMaxLen then
             nFacAdj = vAdj[i]
+            dMaxLen = dLen
             EgtOutLog( string.format( 'Adjac=%d Len=%.3f H=%.3f V=%.3f', vAdj[i], dLen, dH, dV), 3)
-            break
          end
       end
    end
+   if not nFacAdj then
+      local sErr = 'Error on process ' .. tostring( Proc.Id) .. ' long adjacent face not found'
+      EgtOutLog( sErr)
+      return false, sErr
+   end
+   -- Riordino le dimensioni per avere dH come lato lungo e dV come perpendicolare
+   local _, vtN = EgtSurfTmFacetCenter( Proc.Id, nFacAdj, GDB_ID.ROOT)
+   if abs( vtN * rfFac:getVersX()) > abs( vtN * rfFac:getVersY()) then
+      dH, dV = dV, dH
+   end
    -- Determino se estremi aperti o chiusi
    local bOpenStart = false
    local bOpenEnd = false
    local vAdj2 = EgtSurfTmFacetAdjacencies( Proc.Id, nFacAdj)[1]
-   EgtOutLog( 'Adj2=' .. table.concat( vAdj2, ' ,'))
+   EgtOutLog( 'Adj2=' .. table.concat( vAdj2, ' ,'), 3)
    for j = 1, #vAdj2 do
       if vAdj2[j] == nFacInd then
          -- Se non esiste faccia adiacente a lato precedente -> inizio aperto
@@ -551,15 +558,19 @@ local function MakeByChainOrSaw( Proc, nPhase, nRawId, nPartId, nFacInd, rfFac,
          if EgtTdbSetCurrTool( EgtTdbGetToolFromUUID( sTuuid) or '') then
             dSawDiam = EgtTdbGetCurrToolParam( MCH_TP.DIAM) or dSawDiam
             dSawThick = EgtTdbGetCurrToolParam( MCH_TP.THICK) or dSawThick
-            dMaxDepth = EgtTdbGetCurrToolMaxDepth() or dMaxDepth
          end
       end
+      if dSawThick > dV + 10 * GEO.EPS_SMALL then
+         local sErr = 'Error on process ' .. tostring( Proc.Id) .. ' sawblade too thick'
+         EgtOutLog( sErr)
+         return false, sErr
+      end
       -- Calcolo uso faccia
       local nFaceUse = BL.GetNearestOrthoOpposite( rfFac:getVersZ())
       -- ingombro del grezzo
       local b3Raw = EgtGetRawPartBBox( nRawId)
       -- Eseguo i tagli
-      local nStep = ceil( dV / dSawThick)
+      local nStep = ceil( ( dV - 10 * GEO.EPS_SMALL) / dSawThick)
       local dStep = 0
       if nStep > 1 then
          dStep = ( dV - dSawThick) / ( nStep - 1)
@@ -605,7 +616,7 @@ local function MakeByChainOrSaw( Proc, nPhase, nRawId, nPartId, nFacInd, rfFac,
          return false, sErr
       end
       -- Verifico se necessarie più passate
-      local nStep = ceil( ( dV - 0.5) / dSawThick)
+      local nStep = ceil( ( dV - 10 * GEO.EPS_SMALL) / dSawThick)
       local dStep = 0
       if nStep > 1 then
          dStep = ( dV - dSawThick) / ( nStep - 1)