diff --git a/script/tweaK.py b/script/tweaK.py
index 28ab40d..0f4b887 100644
--- a/script/tweaK.py
+++ b/script/tweaK.py
@@ -1,11 +1,14 @@
 
 
-def tweak(dev, step):
-    import ch.psi.pshell.swing.Shell as Shell
+def tweak(positioner, step):
+    positioner=to_list(string_to_obj(positioner))
+    step = to_list(step)
     while (True):
         key=Shell.waitKey(0)
         if key == 0x25 : #Left
-            motor.moveRel(-step)
+            for i in range(len(positioner)):
+                positioner[i].moveRel(-step[i])
         elif key == 0x27 : #Right
-            motor.moveRel(step)
+            for i in range(len(positioner)):
+                positioner[i].moveRel(step[i])
     
\ No newline at end of file