GAM SX4 DMX LOOP TRAY TS6111 User Manual

GAM Hardware

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When using a DMX device with a discharge lamp such

as CDM or an HMI, it’s suggested that you separate the

power circuit for the discharge lamp from the DMX control

device. When using DMX controlled units such as an In-

dexing TwinSpin™ or SX4® Gobo Changer or DMX Loop

Tray, the “noise” from the discharge lamp ballast may

cause some interference and or damage the electronics.

We recommend providing separate line voltage to the

DMX devices and the discharge light fixture.

SX4® DMX Loop Tray
1. Loosen the Captive Retaining Screws (These captive

screws will loosen but not come out).
2. While pulling on the Effects Drawer, release the Safe-

ty Latch and pull out drawer from the SX4® Housing.
3. Push the Tension Roller towards the Drive Roller until

it engages the Tension Roller Catch and holds it in the

loading position.
4. Slide the Fixable FX/Loop over the rollers. (Due to the

small space between the roller assembly and the inside

of the housing, the loading is easier if the housing is

sitting on the edge - not resting flat). Some of the more

open loops, such as fire and clouds, tend to catch on the

shoulder of the roller. Sometimes it is easier to advance

the loop around the rollers as you are loading to clear the

inevitable snagging of the loop.
5. Be sure the FX/Loop rests between the brass shoul-

ders of the drive roller.
6. Release the Tension Roller Catch slowly and allow

the Tension Roller to extend fully. (Don’t allow the roller to

snap out - this could damage the loop). Confirm that the

loop is making square contact with the rollers.
7. Connect the unit to DMX Power Supply. For opera-

tion, see details below.
8. Slide the Effects Drawer into the SX4® Housing - The

drawer will have a positive snap when the safety catch

is engaged.
9. Tighten the Retaining Screws. Make sure the screws

are fully seated.

NOTE: It is important that the screws be tightened com-

pletely, DO NOT depend on the safety latch to hold the

Effects Drawer securely.


The unit can be oriented with the FX/Loop running

horizontally, vertically or any direction in between. Loosen

the retaining screw and knob. The barrel can be adjusted

about 25o on either side of vertical. To adjust beyond

25o requires further loosening the barrel screw and knob.

The FX/Loop runs in two planes separated by about 1.25

inches. The lens can be adjusted (by sliding the lens tube

in and out of the barrel) to focus on one plane or the other

or somewhere between the two. Focus on one plane will

leave the other plane very much out of focus and gives an

unambiguous direction to the effect.
Focus between the two planes leaves both out of focus.

Many effects, (even the most realistic) benefit from being a

bit out of focus. Other effects yield surprising results when

very out of focus. It’s worth the time to experiment. Also

worthy of experimentation is to use another moving effect

(the GAM TwinSpin™ or the GAM Film/FX™) in the iris/

FX slot. This too is on a different focal plane than the film

loop, but as you will see, it can offer some unusual effects.
Attach a safety cable to the safety loop on the bottom of

the Effects Drawer and to the yoke or light pipe.
• For longest life and for the most effective image, be

sure to adjust the centering and flatness of field of the

• Hot spots will cause uneven heating and wear on the

FX/Loop and shorten their useful life.
• Always have the FX/Loop in motion before the light

comes on. Don’t allow the FX/Loop to be still in the gate

with the lamp on as this will allow one section to heat up

and will shorten the life of the loop (especially if concen-

trated on the seam).
• Shipping and Storage: To prevent damage to the

screws or to the mechanism, be sure the drawer Retain-

ing Screws are tightened securely.


The following instructions will refer to the direction of

loop travel as “forward” (right to left) when viewing the

image on the wall from behind the instrument.

GAM Product #TS6111

Rosco Product #206 36200 0120