Robe Robin 600 LEDWash User Manual download pdf (Page 5)

84 • May 2011 •

Lighting&Sound

America

TECHNICAL FOCUS: PRODUCT IN DEPTH

olor and strobing. This allows

effects such as those shown in

Figure 16, in which each ring is a

different color and brightness.

Pan and tilt

The Robin 600 LED Wash has a pan

range of 450° and tilt of 300°. A full

range pan move took 2.5 seconds,

while a more typical 180° move fin-

ished in two seconds. Tilt took 1.5

seconds for a full move and 1.25

seconds for 180°. Positional repeata-

bility on both pan and tilt was excel-

lent, with an error of only 0.08° —

which is around 0.3" of error at a 20'

throw. Movement was also very

good, with smooth moves at all test-

ed speeds. Both pan and tilt use

tried-and-tested mechanisms using

familiar three phase motors, belt

drives, and full positional feedback

(Figure 17).

Noise

As mentioned earlier, the head fan is

temperature controlled, so it speeds

up and slows down as the LED power

and temperature varies. The figures

measured here are with all LEDs on at

full and after waiting 30 minutes for the

unit to reach equilibrium.

Sound Levels

Normal Mode

Ambient <35 dBA at 1m

Stationary 37 dBA at 1m

Homing/Initialization 50 dBA at 1m

Pan 46 dBA at 1m

Tilt 44 dBA at 1m

Zoom 46 dBA at 1m

Theatre Mode 43 dBA at 1m

Although pan was very slightly

louder, zoom was the most notice-

able in operation. It’s quick to oper-

ate but quite loud. The Robin 600

LED Wash offers a theatre mode of

operation, which you can set in the

menu system. This slows down the

pan, tilt, and zoom motors to reduce

noise levels. With this mode enabled,

noise on those functions came down

about 3dB.

Electrical parameters

The Robin 600 LED Wash has a fully

power-factor-corrected auto-ranging

(100 – 240V 50/60Hz) power supply,

and it consumed 3.5A, 420W with a

unity power factor when running with

ll LED emitters at full power but no

motors running. This equates to a

maximum efficacy at the widest beam

angle of 17.5lum/W. The quiescent

load with no LEDs or motors running

was 0.36A, 38W, with a power factor

of 0.85.

Initialization time from power up or

from sending a reset command

through the DMX512 control channel

was 30-35 seconds. The unit is well-

behaved; it fades to black before start-

ing to move in reset, and fades back

up again when the reset is finished.

Electronics and control

The Robin 600 LED Wash uses

Robe’s standard color LCD display

fitted with a touch screen as well as

four push buttons (Figure 18). You

can use either to operate the system,

and it is battery-operated to allow

setting parameters before the unit is

powered. The system offers a com-

prehensive range of DMX512 options

as well as a good range of diagnostic,

stand-alone operation and service-

related entries. The unit also stores all

failure events, so there is a full service

log available for the shop to look at.

The electronics are distributed

throughout the unit, with control and

power supplies in the base (Figure 19)

and motor drivers in one yoke arm

(Figure 20) as well as the LED drivers

in the head, which we’ve already

looked at. Finally, there is a compre-

hensive range of connectors and data

formats available, with the Robin sup-

porting Art-Net and MANet over

Ethernet, as well as DMX512 and

RDM over both standard five-pin and

non-standard three-pin XLR connec-

tors (Figure 21).

Construction

The Robin 600 LED Wash is of stan-

dard current construction, using plas-

tic covers over a die-cast and sheet-

aluminum chassis. Access to the elec-

tronics in the yoke arms, head, and

top box is simple and should present

no problems. Access to the LEDs is a

bit more time-consuming—there are a

Figure 17: Tilt motor

Figure 18: Display

Figure 19: Control and power supplies

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Robe Robin 600 LEDWash User Manual Page 5

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