diff --git a/Drilling.cpp b/Drilling.cpp
index b10a86b..928d111 100644
--- a/Drilling.cpp
+++ b/Drilling.cpp
@@ -2300,7 +2300,7 @@ Drilling::DoPeckDrilling( const Hole& hole, SelData Id, int nPathId)
          return false ;
    }
   // ciclo di affondamento a step
-   const double MIN_STEP = 5 ;
+   const double MIN_STEP = 1 ;
    const double APPR_STEP = 1 ;
    const double MIN_MOVE = 1 ;
    double dStep = max( m_Params.m_dStep, MIN_STEP) ;
diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index 7a59acf..a5125bd 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ