Meyer Sound M3D-SUB Specifications download pdf (Page 18)

Figure 10. Checking phase (chain direction)

4. Run the chain through the motors until they are

approximately 2 feet off the ground.

5. Attach the chain bags and feed the unused chain into

the bag.

6. If using 2-ton motors, check for any twists in the

overhead chain and correct if necessary (see Figure

11).

Figure 11. Rigger checking overhead chain

STACKING AN M3D ARRAY

ATTACHING MOTORS TO THE MTG-3D TOP

GRID

Use rated steel cables and shackles when attaching

motors to the MTG-3D Top Grid, as shown in Figure 12.

The MTG-3D Top Grid will accommodate 5/8-inch and

3/4-inch shackle sizes on its pickup points.

Figure 12. Attaching motors or bridle legs to the MTG-3D Top

Grid

The extension frame on the MTG-3D Top Grid is provided

to help keep the center of gravity evenly distributed

between the front and back points. This frame can be

used in either the retracted or the extended positions,

depending on which will provide the most even weight

distribution when the array is in its nal trimmed

conguration.

The M3D Placement Calculator provides weight

information on the front and back loads to help select the

correct pickup lotions — back rigging point (BRP) 1, 2,

or 3 — prior to the array being rigged. However, during

assembly it may be necessary for the front or rear motors

to temporarily support the entire weight of the array.

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Meyer Sound M3D-SUB Specifications Page 18