Watson-Marlow SP40 - Manual (Page 42)

MAINTENANCE OF CAM AND ACTUATORS
39
The orientation of the actuator relative to the drill mark
(M) on the bracket depends on the pump rotation and
port orientation. The drill mark (M) is always orientated
between the pump ports. The actuator is always
positioned horizontal with the manual turning wheel
facing upwards.
Use the other 4 bolts and washers to place the adapter
with actuator onto the cam assembly.
The actuator is also equipped with limit switches that
electrically limit the rotation angle. Normally these
switches are set in the right position and do not need
adjusting. After mounting the actuator to the cam
assembly it must be checked if the limit switches turn of
the actuator before the mechanical limit is reached.
To check the limit switches remove the cover.
Position 1
Position 3
Position 2
Position 4
M
M
M
M
The pump positions are defined as:
(pump seen from the non drive-end (NDE)
to drive-end (DE). In other words when
looking at the pump front cover.)
Position 1: ports towards the left
Position 2: ports towards the right
Position 3: ports upward
Position 4: ports downward
The actuator rotation is based on a viewing
direction from DE to NDE. Since the
actuator is mounted on the pump cover the
viewing directions for defining pump
rotation and actuator rotation are the
same.
In case the actuator rotation angle is more
than 116° the mechanical stops need to be
adjusted. Contact your Bredel
representative.