Polar Focus Motor Zbeam allows for a single electric chain hoist to support a line array, or conventional box speakers with full control over pan and tilt.
The Motor Zbeam system has a 2:1 mechanical advantage using a 10 inch diameter chain-pulley. Thus a one-ton chain hoist can be used for two tons of loudspeaker load. The pan angle of the speaker load is supported by a Zbeam axle for easy aiming.
Our standard design fits Stagemaker motors. Only one motor is required to control pan and tilt per cluster, resulting in significant savings. The vertical position of each cluster can be controlled by a single motor control pendant or pickle. Since tilt is not controlled by synchronous operation of two hoists, no motor control package is required, which results in additional savings.
Polar Focus collaborated with Dave Potts of Parsons Electric on this project, and since it’s opening in September 2012, Barclays Center has proven that it’s a venue with great sound. There were six line array clusters with 10 EAW KF740 and 4 EAW SBS1001, each totaling 1680 lbs of speaker weight per cluster.
Pan angle is adjusted by turning the suspended speaker load relative to the Motor Zbeam. The pretensioned friction bearing holds the pan angle after you stop applying torque. The most popular suspended speaker loads are line arrays, with tilt controlled by a Spine Frame Adapter™. Other speaker cluster configurations are available.
Even the largest line arrays can have full pan control with a Motor Zbeam.
Below is a video displaying technical details and the simple pan
and tilt control adjustments.
Here’s a lighthearted speed-motion video showing assembly of a speaker cluster for Barclays Center.
* Motor Zbeam pulleys can be produced for chain hoists other than Stagemaker
when a customer provides a sample of the chain from the hoist.
See our catalog for more information, or call us at (413) 586-4444.
Pro audio rigging design, roof attachment, supplemental structure, sales, support and PE stamped drawings in any US State provided by Polar Focus. Call us today for more information.