Overview:

The galvo driver box contains power supplies for the three galvo drivers. In addition the box contains a circuit that couples the two Y galvos through a Gain and provides an Offset to Y1 (Gain and Offset are controlled through ten turn pots accessible on the front panel). 

The galvos need to be operated in differential mode. This is determined by jumper  settings on the galvo drivers boards. They are usually shipped configured for ‘common mode, non-inverting’ To switch to differential mode, only jumper 1-3 need to be connected. This usually means that jumper 4-6 needs to be disconnected. (see MicroMax Series 671 Cambridge Technology manual). Differential Mode is important because the range of the offset knob will otherwise not be sufficient. 

X and Y inputs are provided through the green input plug (cable provided).

The BNCs on the front panel provide position signals for the mirrors.

Always make sure the driver power is OFF when plugging in the galvos.

Zero the inputs through the BNC cables - in other words, short the X and Y inputs or terminate with 50 Ohm. 

With the galvos connected - the LEDs on each driver board should turn green after the power is turned on.

The driver boards are arranged in the order 

X , Y1, Y2  

Y1 is the first mirror in the path. 

Y1 is spec'd for M30 (30 degrees peak to peak)

An offset is applied to Y1. This offset is tweaked using the front panel 10 turn pot.

Y2 is spec'd for M40