Introduction
The GSL is a fast and versatile galvo scansystem,base on moving magnet galvanometers,
with a small an drugged dual channel closed loop diver.The system run satpretty low voltage,
and can be implemented in almost any existing or new application. With it's driving speed of up
to 45k with the ILDA test pattern,displayed at an angle of 4 - 5.
The standard delivery package contains driver, power supply and in put cable. The driver
is presetted to the included galvos,but has to be retuned slightly before first use.This can be done
by using the three adjustment trimmers on thedriecard. Please note, that the galvos are not set for
maximum speed at small scan angle, but set to a usable angle of 20 at 25k.

The cable
High speed galvanometers demand for special cables,which are shielded an separated between
motor and position detector.Cable lengths up to100 cm are allowed.Were commenda cable
length of maximum 50cm.
Powersource
Power source is not very critical and has minor influence on speed and quality of the complete
scanner system. Even if a standard transformer with a bridge and caps will do, We
recommends a stabilized or switched power supply. The driver boardisable to run between +/-
18VDCto+/-24VDC, at 1 A each. Recommended power supply is the PSU with 2x24VDC.
If you use transformer and bridge, then make sure to have minimum 10,000uF caps per voltage,
better 40,000uF,parallel with a100uF for fast peaks. Do not use extra capacitors at switching
power supplies.

Polaritiy of connecting power to the driver is important.No warranty if connected incorrect.

The measuring procedure
The Space Las was measured with Mamba Black with USB-Box, running at the desired output
speed,using the standard ILDA test pattern. Laboratory power supply at +/-24VDC, room
temperature.Windows PC with MambaBlack, 12/30k ILDA test frame. It was also tested
after wards with pangolin LD2000, running the same test pattern.4.5x10x0.5mm mirror was used
during measuring period. Tests showed as light decrease of performance at about 5 by using a
larger 5x11x0.6 mm mirror. The galvos where fixed in the standard mounts on an aluminum
base plate, no forced cooling.

Speed Deflection angle Operating voltage
<20.000pps 30 optical deflection +/-24V
<25.000pps 20 optical deflection +/-24V
<30.000pps 15 optical deflection +/-24V
<40.000pps 8 optical deflection +/-24V
<45.000pps 5 optical deflection +/-24V

Adjustments
of them Standard configuration shows 7 adjustment pots, 4 of them are necessary for the user. 3
should not be changed in setting. These are necessary for linearity and other galvo specific
settings.
Basic adjustments
The driver board comes already pre adjusted for 3 projection angle and needs to be setup for the
galvo only in small areas. Every galvo is different, so 3 of them adjustments are needed. For this,
the ILDA test pattern is used, also a set up of the galvos in X Y with a laser. If you need to tune
the driver faster to smaller angles, follow the procedure below. Also if the driver is totally
dead justed, this will be the procedure to retune it:
Size, Servo-Gain, Damp in gundHF-Damping are adjusted counter clock wise to their left zero
position. Now turn LFD 5 full rounds clock wise to right.
Connect computer with ILDA test pattern, run it atapprox. 20kpps.
Power on the amplifiers.
Slowly open the servo gain(clockwise). The mirror of the galvo should move now to its middle
position. If yes,turn two rounds clockwise.
Slowly open the size until you see the galvo moving.
Increase servo gain until you see over shoots. Correct it with LFD.
Decrease under shoots by opening the HFD pot slightliy clock wise. Remove gain/LFD
procedure and correct with HFD, until you the picture looks satisfying. Carefully fine tune the
driver. The better your fine tuning is, the fasteris the scan speed.
Increase speed of test patterns and redjust for optimized picture.

In/Outputs
One ach pin connector, all necessary in and outputs are available. Here is the power supply
connected,Were commend a ground free operation between computer and drivers.

Important hints
Do not remove the driver board from its mounting bracket. This additional metal plate is
needed for ground and inereasesstability of the driver. The bracket is isolated from ground.
Space Las Do not use cheap and unshielded cable. Were commend touse the Space Las only with
cables.These cable saretested and designed for this driver.We do not offer any warranty , if
other cables are used.
If the galvos gets very hot(above45/115F),switch off the system and check for errors
of problems. Use approbriate heat sink for the galvos. Do NOT run them with out heatsink!!
If the fuses blow continously, do not replace them with a higher valus. Check for possible errors.
The maximum current perphase should be inaverage below700mA. If it is higher, there can be
a problem, which can result in overheating the galvos.

Connecting the dual channel driver
Each channel of the driver must be connected to the power supply and to the signal source. Both
4 pin connectors show equalpinning. Connect both channels +24VDC to the positive 24VDC
coming from the power supply, also the -24VDC to the negative source from the powersupply.
Use only one ground pin of each connect or to connect to the GND of power supply