diff --git a/script/rock.py b/script/rock.py
index 5b5970f..3ad1bf6 100644
--- a/script/rock.py
+++ b/script/rock.py
@@ -19,8 +19,8 @@ def rock(axis = th1, ffail = False, tt = 0.2, seti0 = False, dx = None, noref =
     # put 'Retry deadband' to 0.00004 and 'Retries Max' to 5
     time.sleep(0.2)
            
-    caput(th1.channelName + '.RDBD',0.00004)
-    caput(th1.channelName + '.RTRY',5)    
+    caput(axis.channelName + '.RDBD',0.00004)
+    caput(axis.channelName + '.RTRY',5)    
     
     print time.strftime('%X %x')    
     axis_pos = axis.read()