Daktronics Scoreboard Dual Hoist - Manual (Page 7)

S Control with Leveling 3
Section 2: S Controls with Leveling
Warning: The Vortek hoists are not designed to raise and lower people. These
hoists should NEVER be used for this purpose.
If it is necessary to operate a hoist from a location where the operator’s view
of the moving load is obstructed, a second person must be used to observe the
load and communicate to the operator
2.1 S Controls with Leveling Overview
The Vortek hoist system is a dead-haul 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 and electronic 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 Daktronics S Series controlled hoist system consists of three basic parts.
• Power Panel Assembly housing reversing contactors and control circuitry
• Winch Assembly (cable drum, load brake, limit switches, frame)
• Master Control Cabinet (MCC) and Standard Controller, if applicable.
1. The power panel assembly is located at the end of each Vortek motorized hoist. There
is a resettable circuit breaker located at each power point on the High Voltage wireway
that also serves as a safety disconnect. The rated twist-locking plug on each unit also
acts as a main high voltage disconnect.
2. The Vortek hoist assemblies are mounted on the rigging steel at the top of the stage
house. The gear motor, helically grooved cable drum, support bearing and frame
structure are all factory assembled and tested. On each hoist assembly is one set of
hard struck limit switches. These limits are the upper ultimate limit and lower ultimate
limit. These limit switches are adjusted by factory-trained personnel at the factory and
are fine tuned on site by the installer during installation and commissioning of the
system. There is also one set of over travel limits. 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.
3. Control of each hoist is possible from the MCC located such that a clear line of site can
be achieved.
4. The MCC contains the main system disconnect, master control contactor, control voltage
power supply and control buttons.
5. Please see the Controls Operating portion of this manual for the operating procedures.