diff --git a/Thermo.Active.NC/NcAdapter.cs b/Thermo.Active.NC/NcAdapter.cs
index 6ebeee56..5e0af795 100644
--- a/Thermo.Active.NC/NcAdapter.cs
+++ b/Thermo.Active.NC/NcAdapter.cs
@@ -37,7 +37,7 @@ namespace Thermo.Active.NC
     /// <summary>
     /// Avvio prod lotto
     /// </summary>
-    public DateTime lottoStart;
+    public DateTime lottoStart = DateTime.Today;
     /// <summary>
     /// Ultimo avvio prod pz
     /// </summary>
@@ -1511,10 +1511,13 @@ namespace Thermo.Active.NC
           // salvo anche nei live data della ricetta...
           RecipeLiveData.TC_last = lastCycle;
 
-          // stima durata da pz fatti...
-          //currentProdPanel.StimaDurata = Math.Round((currentProdPanel.NumTarget - currentProdPanel.NumDone) * currentProdPanel.LastTCiclo, 2);
-          // 2020.09.03 uso dati da ricetta corrente... stimata con EWMA, in SECONDI!
-          currentProdPanel.StimaDurata = Math.Round((currentProdPanel.NumTarget - currentProdPanel.NumDone) * lastCycle, 2);
+          // stima durata da pz fatti... SOLO SE il NumTarget è > 0
+          currentProdPanel.StimaDurata = 0;
+          if (currentProdPanel.NumTarget > 0)
+          {
+            // 2020.09.03 uso dati da ricetta corrente... stimata con EWMA, in SECONDI!
+            currentProdPanel.StimaDurata = Math.Round((currentProdPanel.NumTarget - currentProdPanel.NumDone) * lastCycle, 2);
+          }
           // se stima negativa (+ pezzi di quanti richiesti...) --> ZERO!
           currentProdPanel.StimaDurata = currentProdPanel.StimaDurata < 0 ? 0 : currentProdPanel.StimaDurata;
         }
@@ -1527,7 +1530,7 @@ namespace Thermo.Active.NC
             currentProdPanel.TempSetpoint = lastRecipe["pyrometer_pyrometer_setpoint"].SetpointPLC;
           }
         }
-        // dal DB recupero i dati dei TC storici... cablato a last 30 x ora...
+        // dal DB recupero i dati dei TC storici... cablato a last 30 x ora... ma CALCOLO SOLO i cicli "positivi" = NON i riscaldi...
         if (currentProdPanel.NumDone > 0)
         {
           libraryError = GetHistProdInfoData(out List<ThermoModels.ProdInfoModel> prodInfoDataList, currentProdPanel.NumDone, numRecProdPanelGraph);
diff --git a/Thermo.Active/Listeners/SignalR/SignalRListener.cs b/Thermo.Active/Listeners/SignalR/SignalRListener.cs
index de8890bb..54119fbc 100644
--- a/Thermo.Active/Listeners/SignalR/SignalRListener.cs
+++ b/Thermo.Active/Listeners/SignalR/SignalRListener.cs
@@ -251,7 +251,6 @@ namespace Thermo.Active.Listeners.SignalR
             if (diffData.Count > 0)
             {
                 // salvo update CLONANDO
-                //LastRecipeFullData = currRecipeFull;
                 LastRecipeFullData = currRecipeFull.Keys.ToDictionary(_ => _, _ => currRecipeFull[_].Clone());
 
                 var context = GlobalHost.ConnectionManager.GetHubContext<NcHub>();