Martin smartMAC Manual de usuario descargar pdf (Pagina 2)

www.lightingandsoundamerica.com • November 2008

this point that one of the selling features

Martin touts for the smartMAC is the

complete absence of fans and

consequent silent operation. With a fairly

small 150W to dissipate, the smartMAC

manages to keep everything cool with a

combination of heatsinks, shielding, and

compartmentalization of the various

components. In this case, the glass

shield/diffuser serves two purposes—it

keeps conducted and convected heat

out of the main body of the luminaire,

and also provides a small amount of

diffusion to improve the image flatness

and homogeneity. In addition, the rear

surface of the plate separating the

optical compartment from the lamp

compartment has a mirror finish, to

reflect back infrared energy that’s

emitted from the lamp heatsink. This all

worked extremely well and, even after

running for a few hours, nothing was too

hot, and I was even able to change

gobos without pain. Martin is trying to

get every lumen it can out of this small

lamp, so it has gone for a fairly fast

ellipsoidal optical system. This often

leads to a very peaky beam, and I’m sure

that this filter is one of the means it has

utilized to combat that and smooth

things out a little. Also mounted on the

rear of the unit is the high-voltage ignitor

connected back to the ballast mounted

in the top box.

Color systems

Next is a single color wheel containing

eight replaceable trapezoidal dichroic

colors plus an open aperture (Fig. 5).

Given the market this unit is aimed at,

it’s not surprising to see such saturated

colors. The reds and blues in particular

are very deep and definitely chosen for

their effect value. It’s hard to get a great

red with the MSD/2 lamps, as there is so

little red energy there to start with;

however, the smartMAC does a

reasonable job.

The trapezoidal filters have a fairly

small join between them, so the

smartMAC can produce some pretty

good split colors (Fig. 6). The colors are

all removable, and use a center retaining

clip similar to those used on other Martin

products—the access to change them is

much easier than usual, though; more on

that later in the review.

The color wheel has the usual select-

and-rotate functionality. It’s a fairly quick

wheel with optional quick-path operation,

not the fastest I’ve seen, but with pretty

good snappy changes. It also has a

good range of wheel-rotate speeds. As

one of its advertised uses is in stand-

alone operation for display and retail

work, these slow, subtle changes are

important.

Strobe shutter

The single flag shutter is mounted

between the color wheel and the gobo

wheel. You can see it clearly at the top of

Figure 5. This flag is the smartMAC’s

only means of reducing the light output,

as the fixture has no dimmer. You can

slide the shutter across the beam slowly,

but that really isn’t dimming, as the

shutter remains distinctly focused the

whole time—it really behaves more like a

single framing shutter. Leaving out a

dimmer seems like a slightly odd

Fig.5: Effects module.

Fig.6: Split colors.

Fig.7: Gobo.

Fixed Color Wheel

Color Blue Green Orange Yellow Pink Magenta Congo Red

Transmission 2.6% 36% 42% 84% 28% 6.9% 0.6% 4.5%

Color Wheel

Color change speed – adjacent 0.15 sec

Color change speed – worst case 0.5 sec

Maximum wheel spin speed 0.57 sec/rev = 106 rpm

Minimum wheel spin speed 87 sec/rev = 0.69 rpm

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