SBS System – SB-1000 Operation
7
The previous installation drawings show the balancer mounted on the wheel end of the grinder spindle. Other
balancer installation options are available including mounting an External Balancer to the pulley or drive end
of the spindle (where machine construction permits). Internal Balancers are also available that mount inside
an OEM supplied bore inside the machine spindle.
Internal Balancers – Automatic mode
Internal Balancers are designed for mounting inside
the machine spindle. The machine manufacturer
must provide a precision-machined mounting bore as
part of the design of the grinder’s spindle in order to
accept an internal balancer. This figure shows an
internal balancer mounted in the wheel end of the
machine spindle with cable connection to the back
side of the spindle. This mounting style is typical,
although other designs are available. Mounting
instructions are provided with each model.
The internal balancer shown with cabled connection
to the SBS collector, which is mounted separately at the rear end of the spindle (not pictured). With other
versions of the balancer, the collector can also be mounted at the wheel end of the spindle, directly attached
to the balancer, eliminating the need for the cable bore down the center of the spindle.
RPM Sensor – Manual mode
An RPM Sensor is required in Manual Balance mode. The SBS sensor SB-1800 (pictured below) is a
proximity type sensor with M12 cable connection. This sensor is recommended for permanent installations.
The cable is sold separately in different lengths.
The sensor must be mounted on a stationary part of the grinder, and be positioned to face a trigger feature on
the rotating part of the spindle assembly. The sensor must be mounted inline with the trigger feature and
within 2mm distance of the trigger feature surface as it passes under the RPM sensor. The trigger feature
must be a once per revolution feature. It can be either a hole of minimum 8mm diameter or a protrusion
from the regular surface of the same size; however SBS recommends a hole be used for safety reasons.
An optical sensor is also available for use with reflective tape as a trigger, part SB-1802. This sensor has the
same size and configuration as the proximity sensor.
An RPM signal by itself (from the motor or other source) is not adequate to achieve balance, as an RPM
sensor with one fixed position must be used to allow the phase position of the spindle to me determined.
