Mach-DSP User’s Manual
Document Number: MACH-DSP-9021
Page 8
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3.1
Power Supply
Power is supplied to the Mach-DSP through a connector that is located approximately in
the middle of the board, toward the rear (near the power amplifier components). The
connector pin functions are shown in Table 3.1.
The standard version of the Mach-DSP can be operated with power supplies ranging
from
±
18V to
±
30V. However,
±
24V is required for optimal large-signal performance.
Operating the standard version with higher power supply voltages will not provide any
increase in scanning performance, but will generate more heating of the servo driver.
However, operating the standard version at lower power supply voltages will incur a
decrease in large-signal performance.
Note that the component values in the power amplifier section are optimized to operate
at specific power supply voltages you specify at the time of purchase. When these
components are matched to the power supply used, this results in the best possible
large-signal performance. Upon request, the Mach-DSP can be special-ordered to
operate
optimally
with power supply voltages as low as
±
12V or as high as
±
30V.
The actual power supply current requirements are dependent on the application, and
will vary as a function of the magnitude and duty cycle of galvo acceleration required.
Idle current is around 200mA from each of the supply rails, so this represents the
minimum current requirement. Laser marking and material processing applications
typically draw well under 1 amp from each supply rail while some raster imaging
applications and laser lightshows may require several amps continuous.
The Mach-DSP servo is rated for a maximum +/-5A RMS and +/-10A peak output
currents, per axis.
Table 3.1: Power Connector
Pin
Function
1
Positive supply
2
Negative supply
3
Ground
4
Ground
Mating Connector Housing:
MOLEX Mini-Fit Jr: 0039012040
Mating Connector Pins:
0039000073 or 0039000074
Specified Wire Size:
AWG #18-#24
The Mach-DSP was designed with some degree of protection on the power supply pins.
Nevertheless,
YOU MUST OBSERVE POWER SUPPLY POLARITY NOTED IN THE
TABLE ABOVE, AND OBSERVE THE MAXIMUM OPERATING VOLTAGE FOR
EACH MACH-DSP. APPLYING ELEVATED VOLTAGES, OR NEGATIVE VOLTAGE
TO PIN 1, AND/OR POSITIVE VOLTAGE TO PIN 2 MAY RESULT IN IRREPARABLE
DAMAGE TO THE MACH-DSP AND WILL VOID THE WARRANTY!!!
