Technical data

8981 500 278 7/09
5
TSplus Assembly Conveyors
Bosch Rexroth Corporation
Application and Function
Speed control of the lift and lower opera-
tion is provided by flow controls and end-
cushion adjustments on the pneumatic
cylinder. Speed control of the rotate cycle
is provided by an adjustable potentiometer
located on the motor drive controller inside
the control enclosure.
Stop gates and proximity switches must
be supplied separately to provide for pallet
pre-stop, stop, and pallet present sens-
ing. In addition a double-acting detented
pneumatic valve will be required to control
the lift/lower cylinder.
In operation, the lift plate on the lift-rotate
unit contacts the workpiece and positions
itself into the corners of the workpiece
pallet’s frame. Lift action is provided by a
pneumatic cylinder with the capability to lift
up to 30 kilograms or about 66 pounds.
The lift-rotate unit has a 90mm non-
adjustable stoke which in operation lifts
the workpiece pallet 68mm above the
system’s transport height. This non-
adjustable stoke ensures that the rotating
workpiece pallet will clear any other mod-
ules or components which are attached to
the transfer line near the lift-rotate unit.
As with other modules, the lift-rotate unit
uses proximity switches which signal the
status of the device. One proximity switch
indicates when the module is in the lift
position while another indicates when it
is lowered. In addition, a third proximity
switch senses the position of a flag on
the shaft of the rotate unit. This switch
indicates each 90º increment of workpiece
pallet rotation.
The rotational movement is supplied by a
direct current gearmotor and cam indexer.
Rotation speed and the direction of rota-
tion must be selected at the time of instal-
lation. The lift-rotate unit is not designed
for force absorption, or programmable bi-
directional operation. However, a special
bi-directional unit is available as a modified
standard option.
NOTE: All proximity switches are in-
cluded for lift-rotate operation. A sepa-
rate proximity switch and stop gate are
required to detect “Pallet Present” This
stop gate and proximity switch typically
attach to the conveyor side rail.
The lift-rotate module is designed to
change the horizontal orientation of the
workpiece pallet on the transfer line by
rotating the workpiece pallet 90º or 180°.
This module will function with pallet sizes
from (160 mm x 160 mm) to (480 mm x 480
mm). However, if the workpiece pallet is not
square, rotation must be limited to 180º by
the host controller.
Each lift-rotate module consists of two
components; the lift-rotate unit and the
control enclosure. The lift rotate unit per-
forms the rotational positioning function. It
uses a parallel shaft indexer driven by a DC
gearmotor for variable speed control of ro-
tation. The lift-unit mounts to the underside
T-slots of the conveyor section.
The control enclosure contains the motor
drive assembly and terminal strip for all wir-
ing connections. It may be mounted to the
T-slots in the side of the belt section or leg
sets near the lift-rotate unit. The controller
contains the logic to complete one 90°
rotate cycle. An external signal must be
provided by a host controller to initiate the
rotate cycle; 180° rotation can be obtained
by cycling the module twice. The lift and
lower movements of the lift-rotate module
are also controlled by the host controller.