Daktronics Pro Series Operations and Maintenance Manual - Manual (Page 12)

WARNING
The Vortek batten hoists are not designed to raise and lower people.
These hoists should NEVER be used for this purpose.
The Daktronics hoist system is an automated rigging system meaning that the load is not counter-weighted. Each
hoist can lift loads only up to the design capacity. Overloading will result in electrical overload protection shut
down of the hoist and possible damage to rigging components.
Each hoist system consists of an integral electric motor driven reducer, directly coupled to a cable drum, which
winds steel cables (wire ropes) leading over sheaves installed within the hoist assembly and along the structural
steel of the building. The cables support battens for attaching the load. The battens can be lowered to within the
specified trim above the stage floor to allow attachment of loads.
The Daktronics hoist system consists of three basic parts.
Motor electronic variable frequency drive
The Electronic Variable Frequency Drive and dynamic braking resistor for each motor is located in each Vortek
motorized hoist. A local control panel is located on each hoist for programming and diagnostics by factory
personnel. There is a reset-able circuit breaker located at each power point on the HV wireway. The rated
twist-locking plug on each unit acts as the main high voltage disconnect along with its corresponding CB.
Hoist assembly (cable drum, load brake, limit switches and frame)
The Vortek hoist assemblies are mounted on the rigging steel at the top of the stage house. The gearmotor, helically
grooved cable drum, support bearing and frame structure are all factory assembled and tested. Maximum upper
height and minimum lower height are set by limit switches which are adjusted by factory-trained personnel during
installation and commissioning of the system. A position encoder is located at the brake end of each hoist motor,
attached directly to the motor shaft. Each hoist assembly is also equipped with a LOAD BRAKE, a unique safety
feature provided exclusively by Daktronics. This unit is designed to engage automatically when the load is being
lowered. This greatly reduces any possibility of a loaded batten to descend uncontrolled.
02 GENERAL INFORMATION
GENERAL INFORMATION 5