For some applications the choice of control may be a simple,
less expensive, manually operated FluxMaster IV unit with a three-position
toggle switch used for controlling the chuck.
Moving the toggle switch to the right provides DC current
for energizing the chuck. The setting of the variable control knob will
determine the DC output to the chuck.
With the switch in the center "off" position electric current will no
longer be delivered to the chuck. Although the electric current is interrupted,
work pieces may remain magnetically attracted to the chuck due to residual magnetism.
Momentarily holding the switch to the left (in the "release" position) reverses the
current flowing to the chuck to release the workpiece.
