There are two additional variations of the standard “HM” Hexadrive
adjustable pulley, giving the option of speed change by electric
remote control or by using an external linear actuator. Either method
offers convenience and safety in those situations where the pulley
drive is inaccessible or in a hazardous location.
Hexact Electric Control Method
The Hexact Electric Control, or “HEC” pulley, operates in the
same manner as the standard “HM” adjustable pulley, except the
hand wheel is replaced by a servo motor drive that opens and closes
the pulley flanges. A separate control station, the Model CN-2601,
is wired to the HEC pulley servo motor to provide speed adjustment
from a remote location. The switch that is part of the CN-2601 control
is a three-position toggle switch suitable for panel mounting. A wiring
diagram is included, and the user must provide wires and a 110-volt
power source for the servo motor. The CN-2601 Control must be
ordered separately, and a Model 501 Torque Arm Bracket is also
required.
All adjustable pulleys in our Hexadrive series, including the M-007,
are available with the electric control option. When ordering, simply
substitute HEC for M or HM. For example, the Model HM-3 manually
adjustable pulley has the same drive characteristics as the Model
HEC-3 electrically adjustable pulley. The only dimension differences
are the overall length of the pulley and the torque arm.
