User manual

Preventive Maintenance
5-8 ProMaster 2500 User Manual
The beam has a traverse motor (with an encoder) that moves the beam
along the lead screw in its horizontal (left-to-right) travel. The encoder
counts the number of steps the beam travels from the home position and
sends that information to the main board. The beam assembly also has a
beam rotate motor that controls the rotation of the device on the chuck.
The 2500 has three additional stepper motors. The label drive motor
(used in the dot matrix printer and in the thermal printer) advances labels
at a precise rate past the print head to create even spacing between
characters. This motor also advances the liner so the label contacts the
device according to the position defined by the label placement value
specified in the Task.
The input orbital motor rotates, causing the input orbital assembly to
shake. This shaking helps the devices slide from the input tube to the
input track. The output orbital motor performs a similar function when
devices are sliding from the output track to the output tubes.
Solenoids
The handler uses air solenoids that are activated by signals from
MOSFET circuitry on the controller board. When the correct logic drive
signal for a specific solenoid is active, an LED associated with that circuit
is lit.
Beam and Chucks
The microprocessor-controlled beam, using a pick-and-place head and an
interchangeable vacuum chuck, picks up and places devices at the
programming or labeling station and releases devices into the output
track.
The beam traverse stepper motor drives the beam on the horizontal (left-
to-right) axis along the lead screw. You must keep this lead screw clean
and lightly lubricated to ensure correct beam operation. If you do not
keep the lead screw clean, the beam may eventually develop alignment
problems and fail to locate the center of a device.
Beam stalling is a term used to describe the failure of the beam to travel
freely on the lead screw, resulting in lost steps and the inability to travel
the full distance of the lead screw. The chance of this occurring is very
low, because the beam traverse motor has an encoder that keeps track of
the beam’s movement.
A device rotate motor, which is mounted on the beam assembly, is
connected to the beam head by a timing belt. The device rotate motor
controls the rotation of devices on the chuck so that the device orientation
can be adjusted for programming or labeling.