As has been noted before, 62155 , the ALS Y WFS DOF1 was unstable in the "INITIAL ALIGNMENT" state (which is the one that run the green camera servo). 

The way that the ALS guardian is written, we use different variables for the gains in the different states.  It would be better if these parameters were in a parameter file somewhere, but I'm not going to change that today. 

The gain for DOF1 Y was -1000 in the INITAL_ALIGNMENT state, and -500 in the ETM_TMS_WFS states.  I've changed it to -500 for both states, this is working fine for both arms.  The attached screenshot shows the oscialltion which went away after the gain change. 

Here are the gains in the ETM_TMS_WFS states:

            self.dof_gain={\
                    'P1':-300,\
                    'P2':-1000,\
                    'P3':5,\
                    'Y1':-500,\
                    'Y2':500,\
                    'Y3':2\
                    }

And the gains now used in the INITIAL_ALIGNMENT state, where Y 2 is still large

            self.dof_gain={\
                    'P1':-300,\
                    'P2':-800,\
                    'P3':5,\
                    'Y1':-500,\
                    'Y2':1500,\
                    'Y3':2\
                    }