diff --git a/script/scan_guard.py b/script/scan_guard.py
index e47f7b5a..9df6706a 100644
--- a/script/scan_guard.py
+++ b/script/scan_guard.py
@@ -851,6 +851,8 @@ class ScanGuard(object):
         while self.running:
             self._ringcurrent.pv.poll()    #pend_event(timeout=1)
             new_beam_ok = self.check_beam()
            
+            print new_beam_ok, self.beam_ok:
+
             if new_beam_ok != self.beam_ok:
                 self.beam_ok = new_beam_ok
                 if new_beam_ok: