SBS SB-1000 User manual

SB-1000 Balance Control
Operation Manual
LL-1100 Rev. 1.2a

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SBS System – SB-1000 Operation
Operation and Specification Manual
for the
SB-1000 Balance Control
LL- 1100
Manual Revision # 1.2a
© 2020 Accretech SBS, Inc.
Corporate Offices
2451 NW 28th Avenue
Portland OR 97210 USA
[e-mail]
Tel: [phone]
Fax: [phone]
https://accretechsbs.com/

SBS System – SB-1000 Operation
Benefits of SBS SB-1000 Balance Control:
 Enhanced digital electronic design with increased operating life and reliability
 Easy to install and operate
 Increases throughput by saving setup time
 Improves part quality by automatically balancing to 0.02 micron
 Longer life for grinding wheels, dressing wheels and spindle bearing
 Icon based User interface for international adaptability
 Backed by world-class SBS customer service
 Works with existing SBS installations

SBS System – SB-1000 Operation
Table of Contents
System Purpose ........................................................................................................................ 1
Operator Safety Summary ........................................................................................................ 1
Balance Theory ......................................................................................................................... 2
Automatic Balance Overview ................................................................................................... 2
Manual Balance Overview ........................................................................................................ 3
Environmental Considerations ................................................................................................ 3
Other Sources of Vibration ....................................................................................................................... 3
Machine Condition .................................................................................................................................... 3
System Installation ................................................................................................................... 4
Control Unit ............................................................................................................................................... 4
Rear Panel Connections ........................................................................................................................... 4
Vibration Sensor Location ......................................................................................................................... 5
External Balancer/ Adaptors – Automatic mode ....................................................................................... 5
Internal Balancers – Automatic mode ....................................................................................................... 7
RPM Sensor – Manual mode .................................................................................................................... 7
Control Unit Operating Instructions ........................................................................................ 8
Front Panel Controls ................................................................................................................................. 8
Startup and Operation .............................................................................................................. 9
Power-On Display ..................................................................................................................................... 9
Multiple Machine Operation ...................................................................................................................... 9
Main Screen ............................................................................................................................................ 10
Preparing to Set Operating Parameters ................................................................................ 11
Background Vibration ............................................................................................................................. 11
Verifying Balancer Sizing – Automatic Balance Mode ........................................................................... 11
Limit ........................................................................................................................................................ 11
Tolerance ................................................................................................................................................ 11
Critical Vibration ...................................................................................................................................... 11
Timing of Auto-Balance .......................................................................................................................... 12
Setup Overview ....................................................................................................................... 12
Select Balance Mode (Automatic or Manual) ......................................................................................... 12
Setup Mode Operation ............................................................................................................................ 12
Automatic Balance Mode........................................................................................................ 13
Setup Automatic Mode ........................................................................................................................... 13
Automatic Balance Operation ................................................................................................................. 14
Manual Weight Movement - Automatic Balance Mode .......................................................................... 14
Manual Balance Mode ............................................................................................................. 15
Setup Manual Mode ................................................................................................................................ 15
Manual Balance Overview ...................................................................................................................... 16
Trim Phase .............................................................................................................................................. 16
Single Point Manual Balance .................................................................................................................. 17
2 and 3 Weight Manual Balance ............................................................................................................. 19
Fixed Position Manual Balance .............................................................................................................. 21
Hardwire Interface ................................................................................................................... 23
Hardwire Interface Overview .................................................................................................................. 23
Input Pin Names and Functions.............................................................................................................. 24
Output Pin Names and Functions ........................................................................................................... 24
CNC/System Timing Diagram ................................................................................................. 25
System Maintenance ............................................................................................................... 26
Collector Maintenance ............................................................................................................................ 26
SBS Return/Repair Policy ....................................................................................................................... 26
Balancer Cable (SB-48xx/SB-48xx-V) .................................................................................................... 27
RPM Sensor (SB-1816) .......................................................................................................................... 27
Vibration Sensor (SB-14xx) .................................................................................................................... 27
Trouble Shooting Guide ......................................................................................................... 28
Error Indications ..................................................................................................................... 29

SBS System – SB-1000 Operation
Factory defaults ...................................................................................................................................... 30
Appendix A: Specifications .................................................................................................... 31
Appendix B: Replacement Parts List ..................................................................................... 32
Support .................................................................................................................................... 32

SBS System – SB-1000 Operation 1
System Purpose
In order for the wheel of a grinding machine to accurately cut, produce smooth surface finishes, and generate
correct part geometry, it is necessary to prevent vibration in the grinding process. A primary cause of
vibration during grinding is the existence of imbalance in the grinding wheel. This is often due to the
heterogeneous nature of the grinding wheel, which contains great numbers of unevenly distributed grains,
causing intrinsic imbalance. This imbalance can be compounded by eccentric mounting of the wheel,
varying width of the wheel, imbalance in the arbor, and coolant absorption into the wheel. Considering all
these factors, even a carefully established initial balance will not last long. Furthermore, due to wear and
dressing, the rotational dynamics of a grinding wheel are always changing. For these reasons, dynamic
balancing of grinding wheels has long been recognized as an important step in the production process.
The SBS Balance System has been developed to provide dynamic balancing for grinding machine operators
with the following objectives in mind:
• Ease and Usefulness of Operation
• Maximum Grinding Machine Efficiency
• Minimal Installation Requirements
• Attractive Purchase Price
Operator Safety Summary
This summary contains safety information necessary for operation of the SBS Balance System for grinding
machines. Specific warnings and cautions are found throughout the Operation Manual where they apply, but
may not appear in this summary. Before installing and operating the SBS Balance System, it is necessary to
read and understand the entirety of this manual. After reading the Operation Manual, contact Accretech
SBS, Inc. for any additional technical assistance required.
Warning: Observe all safety precautions for operation of your grinding machinery. Do not
operate your equipment beyond safe balance limits.
Warning: Failure to properly attach SBS Balance System components to the grinding
machine spindle, including the proper use of provided adaptor lock screws, will
result in safety hazard during machine operation.
Warning: Never operate a grinding machine without all proper safety guarding in place.
Caution: To avoid equipment damage, make sure the line voltage is within the range
specified for the system (see specification section).
Caution: Only qualified service technicians should attempt to service the SBS Balance
System. To avoid electric shock, do not remove the cover of the Control Unit,
or remove cables, with power connected.

2 SBS System – SB-1000 Operation
Balance Theory
The SBS Balance System operates on the principle of mass compensation for any given grinding wheel’s
imbalance. The Intrinsic Imbalance of a grinding wheel is equal to its mass multiplied by “e”, the distance
between the wheel’s center of mass and the wheel’s center of rotation.
The imbalance of a grinding wheel is determined in practice by use of the Measured Imbalance of the wheel.
The Measured Imbalance is equal to the product of the mass of an attached balance weight, located to
balance the grinding wheel, multiplied by “r” the distance between that weight’s center of mass and the
grinding wheel’s center of rotation. In both cases, the imbalance is given in terms of a mass multiplied by a
distance, with (grams)(centimeters) being the units used for reference by the system.
The SBS system with SB-1000 control can operate in either Automatic Balance mode, or Manual Balance
mode in order to correct for wheel imbalance.
Automatic Balance Overview
In automatic balance mode the SBS Balance
System uses two movable weighted masses
located in the Balancer to correct for various and
changing imbalances which occur on the grinding
machine. The balance weights are driven by high
torque electrical motors through a precision gear
train, and can be independently positioned to
compensate for any imbalance within the
specifications of the system.
The automatic balance cycle is complete when
the balance weights are positioned so that
minimum vibration is achieved. Figure 2a shows an unbalanced rotating grinding wheel, with an SBS
Balancer installed. The imbalance is represented by the white dot located on the circumference of the wheel,
while the two black dots represent the weights located in the balancer. By incrementally repositioning the
weights, a triangulation is achieved which cancels out the imbalance, as shown in Figure 2b.
The system consists of the
Balancer, a Balancer Cable, a
Vibration Sensor, and the SB-
1000 Control Unit. Imbalance is
expressed as spindle vibration
detected from the grinding
machine by the sensor. The
vibration signal from the sensor is
transmitted to the control unit,
Intrinsic
Imbalance
= e (
)
Wheel Mass
Measured
Imbalance
= r (
)
Balance
Weight Mass
= Center Rotation to Wheel Center of Mass
= Center Rotation to Balance Mass
Sensor Balancer
Balance Control Unit
Input
Signal
Motor Drive
Signals
2a - Unbalanced 2b - Balanced

SBS System – SB-1000 Operation 3
which filters the signal by RPM. When an Auto-balance cycle is initiated, the control unit drives the two
balancer weights in the direction that reduces the amplitude of the incoming vibration signal.
Manual Balance Overview
The SB-1000 control can also be configured to be used as an aid in performing manual balance operations,
where the cost of a fully automatic system is not warranted. The SBS balancer is not needed when the
system is used in manual balance mode. Instead an RPM sensor is used to monitor the RPM and phase
position of the rotating spindle. An RPM signal not time synchronized to a physical location on the spindle
assembly (from the motor or other source) is not adequate to achieve balance. An RPM sensor with a fixed
position trigger point must be used to allow the phase position of the spindle to me determined.
Balance weights are either moved or added on the grinder manually by the operator as needed to achieve
balance. The SB-1000 assists the operator by analyzing the current balance condition of the grinder and
showing the operator how to position weights to achieve balance.
Environmental Considerations
The SBS Balance System is designed to correct for grinding wheel imbalance and its detrimental effects on
quality of surface finish, part geometry, and wheel and machine bearing life. The system cannot correct for
other environmental sources of vibration on the machine. This section is intended as a discussion of some
common environmental problems which may influence grinding quality.
Other Sources of Vibration
A common source of vibration is adjacent machinery. Grinding machines should be properly isolation
mounted if vibration-producing machinery is operating nearby. Other sources of vibration may also include
components mounted on the machine itself, such as pumps, motors, drives, etc.
The SBS Balance System may not operate efficiently under the influence of some external vibrations. The
system filters the vibration signal it detects from the grinding machine by the frequency of the spindle RPM.
Vibrations occurring at frequencies other than that of the rotating wheel will be ignored by the system.
However if adjacent machinery or auxiliary equipment on the grinder is operating near the same frequency as
the spindle rotation, the system will not be able to distinguish between vibrations occurring from wheel
imbalance and those originating elsewhere.
An excellent test for environmental vibration is to monitor the vibration level on the grinding machine while
the spindle is not turning. The vibration level should be checked in various locations on the grinding
machine, but in particular at the location the vibration sensor is to be mounted. All surrounding equipment,
including any auxiliary pumps or attachments on the grinding machine should be operating during this test.
The SBS Balance System can help perform this test but cannot remove these vibrations (see: Background
Vibration section).
Machine Condition
Grinding machine condition is an important factor in determining the minimum balance level that the
SBS Balance System can achieve. The spindle should be balanced, as well as all components in the
spindle drive train (i.e. belts, pulleys, motor, etc.). The balance system can be used to readily determine
if any significant imbalance exists in the machine itself. Simply use the same method as described
above for checking environmental vibration, except test with the spindle running and with no wheel
mounted. The SBS Balance System cannot remove vibration resulting from machine condition
problems.

4 SBS System – SB-1000 Operation
System Installation
Control Unit
The SBS Control Unit should be mounted in a location allowing observation of the display by the machine
operator. A variety of mounting hardware is available for installation on vertical surfaces or for rack
mounting.
Rear Panel Connections
The following connections are located on the rear panel of the Control Unit.
1) POWER SUPPLY. Terminal block connection for power input. 22 VDC to 26 VDC, 3.5A
max at 22 VDC. There is no power switch on the SB-1000, as it is designed for constant
operation. If power must be disconnected by the user, a separate switch on the power line
may be installed at installation.
Caution: Before applying power to the Control, make sure the supply voltage is within
specified range.
2) Earth Ground. Connect this M5 stud to the GND.
3) Optional CNC Interface. Standard DB-25 connector for connecting to a grinding machine
controller. A complete description of this relay based interface is given in the “Hardwire
Interface” section
4) Balancer/RPM Sensor (labeled 1). 12-pin DIN connection to either the SBS Balancer cable
(Automatic Balance mode) or to the RPM Sensor (Manual Balance mode).
5) Vibration Sensor (labeled 2). 5-pin DIN connection to Vibration sensor.
6) USB connection. Allows USB 2.0 connection to host computer for Firmware update of the
control only. Latest firmware for the control and update instructions are available on the SBS
website https://accretechsbs.com/.
1
6
4 5
3
2

SBS System – SB-1000 Operation 5
Vibration Sensor Location
The Vibration Sensor can be mounted on the grinding machine using the magnetic mount provided, or
permanent stud mount. The magnetic mount should be used during initial system start up until a good
permanent location is found on the grinding machine for the sensor. The sensor can then be permanently
stud mounted at that location, using an M5 set screw. A machined flat should be supplied at the mounting
location when stud mounting the sensor.
The location and installation of the sensor are critical for successful operation of the SBS Balance System.
Because of differing machine characteristics, Vibration Sensor location is specific to the machine model.
There are two general principles that should assist in finding a proper sensor location for your grinding
machine.
1. Locate the Sensor in the same direction as the centerline between the grinding wheel and the
workpiece. The best place to start is a
flat machined surface on the spindle
housing over the bearing closest to the
wheel and perpendicular to the spindle’s
centerline. A vertical mounting surface is
preferable on most cylindrical grinding
machines because the sensor is in line
with the grinding wheel and the
workpiece. For this same reason on
surface grinders and creep feed grinders, a
horizontal mounting surface is generally
best. Although the balancer itself may be
mounted either on the wheel or pulley end
of the machine, the Sensor should always
be aligned at the wheel end of the
machine.
2. Locate the sensor on a rigid part of the machine structure, where vibration from the spindle will
be accurately transmitted. On some machines the wheel guard can be a good location to mount the sensor,
if it is heavy enough and rigidly attached to the spindle housing. The balance system relies on vibration
signals received from the Vibration Sensor to accurately display the current vibration level in peak-to-peak
units, and to balance the grinding wheel. The system employs narrow bandwidth filters that prevent
vibration at non-spindle frequencies from being detected. However, in applications where the motor or other
machine components are running at the same speed or frequency as the spindle, interfering vibrations may
result. Careful experimentation with the sensor’s location minimizes sources of interference.
External Balancer/ Adaptors – Automatic mode
The Balancer is mounted to the machine spindle with the provided adaptor. The mounting
adaptor is specifically designed to accommodate a particular machine’s spindle
configuration, and varies in design. In general the adaptor consists of two parts. The Adaptor Nut mounts
on the grinding machine, usually replacing the spindle nut of the machine, either on the wheel or pulley end
of the spindle. The Adaptor Flange bolts to the Balancer, and threads onto the installed Adaptor Nut.
Appropriate wrenches are supplied for both parts. Use of a lubricating compound between the Balancer and
Mounting Adapter is recommended to ensure ease of future disassembly.
Lock Screws are a feature of many adaptor designs, where required by high machine speeds or machine
spindle braking. These consist of M6 socket set screws in the face of the Adaptor Nut, and M5 socket set
screws in the outer diameter of the Adaptor Flange. These lock screws should be loosened prior to adapter
removal or disassembly.
Surface or Creep
Feed Grinders
Cylindrical or
Centerless Grinders
Sensor Mounted in
Direction of Workpiece
Contact
Workpiece

6 SBS System – SB-1000 Operation
Warning!! - All lock screws must be properly secured each time the Adaptor Nut or Adaptor Flange is
installed to preventing the assembly from coming loose during operation of the grinder. Screws should be
wrench tight (torque provided by a standard hand wrench, without hammer or other tools).
Follow this assembly procedure to ensure
proper mounting of Adaptor Nuts and Flanges
were lock screws are part of the adaptor
design:
1. Loosen all lock screws before
assembly. The engagement end of
these screws should be below flush
with the face of the adaptor/flange
where they exit.
2. Screw the Adaptor nut onto the
machine wrench tight, using the
supplied wrench. Use of hammers
or wrench extension bars is not
advised.
3. Tighten all the lock screws in the Adaptor Nut wrench tight.
4. Thread the Balancer/adaptor flange assembly onto the mating threads on the Adaptor Nut.
5. Tighten the lock screws in the Adaptor Flange wrench tight
6. All lock screws must be fully loosened before attempting removal of these parts from the machine.
The Balancer must be checked for machine clearances at installation. Make sure there is no interference
between the Balancer/adaptor assembly and any part of the machine (e.g. workhead, tailstock), especially
with the wheel at its smallest diameter. Modify the machine guarding if needed to provide clearance from
the Balancer. Machine guarding should be modified to allow the rotary junction and cable to extend outside
the guard.
The Balancer Cable should be restrained
to prevent the cable from being caught up in
the rotating machine, but should allow for the
cable’s removal as necessary during wheel
changes. Optimally, the cable should be
secured so that the connector on the Balancer
points down, as shown in the diagram. This
position will minimize the chance of fluid or
swarf entering the connector when opened
during wheel changes. If heavy wheels are
being changed, remove the Balancer from the
area during wheel changes. Most adapters for
larger machines are of a two piece design,
which simplifies this process. Maintenance
Note: SBS Cable connectors are IP67 fluid sealed when closed, but subject to contamination when open.
Care must be taken to clean out the pin area of cable connectors prior to each re-connection to prevent
premature connector failure. SBS recommends the use of an electrical contact spray lubricant for this
purpose.
Mounting
Adaptor
Flange
External
Balancer
Mounting
Adaptor Nut
Secure all Lock Screws at Each
Installation
Secure Balancer Cable
Firmly to Machine
Modify Machine Guarding
if necessary to clear
Balancer

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.

8 SBS System – SB-1000 Operation
Control Unit Operating Instructions
Front Panel Controls
The following figure illustrates the front panel of the Balance Control Unit.
1) LCD Display. This screen is used to display data and show current settings and status information.
Information is displayed using a symbol based interface, which is independent of language. The display
will dim over a period of about 24 minutes when inactive (no user button presses).
2) Setup button. Press to access the operational settings of the control. Press and hold this button to
access the screen for selection of single machine or multiple machine operation.
3) Cancel button. Press to cancel the operation in progress, or cancel the last selection or entry made.
This button also clears any displayed error message.
4) Balance button. Press to start a balance operation (either automatic or manual, depending on current
mode set).
5) Manual button. When in Automatic Balance mode press this button to access the Manual Weight
Movement screen, which allows the user to change position of the weights in the installed SBS balancer.
When operating in Manual Balance mode, this button is used to perform various steps in the manual
balance process.
6) buttons. Manually move Balancer Weight 1, or change value of currently selected digit.
7) buttons. Manually move Balancer Weight 2, or select digit.
6
7
4 5
2
3
1

SBS System – SB-1000 Operation 9
Startup and Operation
Power-On Display
Power on display shows only after power is applied, and displays for 2 seconds. Press and hold the
Cancel button to extend the duration of this display until button is released. For support reference, the
installed Firmware rev. is displayed at the right side of this screen, and below that the FPGA code rev.
Multiple Machine Operation
Press and hold the Setup button to access the screen for selection of single machine or multiple machine
operation.
The first icon selects single machine operation, and the second icon selects multiple machine operation.
When in multiple machine operation, the control saves setup information for up to eight separate machines,
using a machine ID number of 1-8. This is useful where the control will be moved between machines with
different setup requirements. Single machine operation should be used for a dedicated installation.
When Multiple Machine operation is selected, the power up screen for the control is immediately followed
by the machine selection screen. This allows the user to verify that the selected machine ID matches the ID
of the machine the control is operating on. It is recommended that the grinding machines in such a scenario
are labeled with the appropriate machine ID number for reference.
The first screen shown indicates that machine 3 is selected and it is setup for Manual balance mode ( ).
The second screen indicates that machine 4 is selected and it is setup for Automatic balance mode ( ). If
no balance mode is setup for a particular ID number, then the ( ) on screen will be empty. This indicates an
available or unused ID.
Use the arrow buttons to change the machine number selected.
Pressing will accept the current selection and go to the Main screen.
Pressing will accept the current selection, and show the select balance mode screen, allowing the balance
mode to be changed for the selected machine.

10 SBS System – SB-1000 Operation
Main Screen
This is the main display screen of the SB-1000, regardless of the balance mode set (automatic or manual).
The basic features are as follows:
1. RPM indication. RPM values will not display if there is no incoming signal (spindle is stopped, or RPM
sensor is missing or shorted). A manual RPM value can be set if needed (see Manual Weight
Movement).
2. Vibration level indication. Vibration values will not display if there is a vibration sensor error (missing
or shorted), or if there is no RPM value displayed.
3. Vibration bar graph. Shows the current vibration level graphically. The scale is linear between the
current settings for Balance Limit and Balance Tolerance. A different linear scale applies between the
Balance Tolerance level and the Critical Balance level.
4. Balance Limit. This fixed position on the graph indicates the current level set for the Balance Limit,
relative to the measured vibration level.
5. Balance Tolerance. This fixed position on the graph indicates the current level set for the Balance
Tolerance, relative to the measured vibration level.
6. Critical Balance Level. This fixed position on the graph indicates the current level set for the Critical
Balance, relative to the measured vibration level.
7. Status indication area. Displays a number of icons to indicate status conditions. The general status
indications, common to both automatic and manual balance modes are as follows:
a. - Front Panel Inhibit (FPI)
b. - Machine ID number selected (shown only in multiple machine operation).
c. - Tolerance Level exceeded. (Not shown) The symbol will display and flash in the same position
as the symbol shown on the screen if the vibration is over the level set by the user for Balance
Tolerance.
d. - Critical Balance exceeded. The symbol will flash if the vibration level is over the Critical
Balance level user setting.
e. - Critical RPM exceeded. The symbol will display and flash if the RPM level is over the Critical
RPM user setting.
f. - Error Condition. The symbol is displayed only if an error condition is present, but was hidden
by the user by pressing Cancel. Press again to display the hidden error(s).
3
4
5
6
2
7
1

SBS System – SB-1000 Operation 11
Preparing to Set Operating Parameters
Ensure you fully understand the function and operation of the Control’s front display panel as
described in previous sections, before attempting the following operations.
Background Vibration
A check of the background vibration level must be performed, to correctly set up the system.
Install the Balancer, Control, and all cables as indicated in the installation section of the manual. Leave the
grinding machine off, press the Manual button to manually enter the operational RPM of the grinding
machine. Note this measured ambient vibration level without the machine running.
Turn on all secondary machine systems (such as hydraulics and motors), but leave the machine spindle
turned off. The vibration level displayed without the spindle running is the background vibration level for
the machine. Note this background vibration level for future reference in setting the operating parameters of
the system. Refer to the “Environmental Considerations” section for explanation of possible sources of
background vibration.
Verifying Balancer Sizing – Automatic Balance Mode
Using the Manual Weight Movement buttons, rotate the masses in the Balancer while the machine is
operating at speed. By running each of the two weights in opposite directions, the operator should be able to
introduce more than three microns of vibration in the grinding machine, but not more than thirty microns.
For grinders that operate at higher speeds (above 5000 RPM), the range of acceptable Vibration produced by
balancer movement should be lowered. If results do not fall within this range, it may be a sign that the
Balancer needs to be re-sized for your application. Contact your SBS Balance System provider for
consultation. In the interim, do not allow the grinder to operate for extended periods with high vibration
levels.
Limit
The SBS Balance System will automatically balance to a user specified low-limit of vibration, the Auto-
Balance Limit. The Limit represents the best balance achievable, and is the target vibration level during an
automatic balance cycle. It is factory set at 0.4 microns displacement. A balance Limit of 1.0 micron or less
is generally considered adequate for most applications. The Limit should be set at least 0.2 microns higher
than the highest background vibration level noted in the “Preparing to Set Operating Parameters” section.
The lower the Limit is set, the longer the system will require achieving balance. Some experience may
be necessary to determine the appropriate auto-balance Limit for a particular installation.
NO BALANCE SYSTEM IS CAPABLE OF BALANCING THE GRINDING WHEEL TO A VALUE
BELOW THE BACKGROUND LEVEL. Trying to set the balance Limit below background levels will
result in long or failed balance cycles. Since the background vibration level is often a product of floor
transmitted vibrations, these levels may change as adjacent machines are put into or out of service. Set the
balance Limit during periods when the system will receive the maximum floor transmitted vibration.
Tolerance
This setting establishes an upper-limit for normal process vibration for the grinder. When reached, this
setting will cause an indication of the need to perform an Auto-Balance. Indications given on the front panel
for balance status are shown, and additional indication is given via. the Hardwire Interface. The Tolerance
level is typically it is set at least 1 micron above Limit setting.
Critical Vibration
This setting establishes an operational upper safety limit of vibration for the system. When reached, this
setting will cause an indication of the critical need to perform a re-balance operation. This indication on the

12 SBS System – SB-1000 Operation
front panel is shown, and additional indication is given via. both the Hardwire and Software Interfaces. The
Critical level is typically set at least 5 microns above the Tolerance setting.
Timing of Auto-Balance
Grinding wheel contact with a work piece or dresser will produce higher vibration levels on the grinder.
This is normal and these levels may exceed the Tolerance level, however this vibration is not related to
wheel balance. Checking the vibration level manually or by the Hardwire interface to determine if there is
need to rebalance should only be done at points in the grinding process when grinding or dressing are not
occurring, such as between parts cycles. Auto-Balance cycles should also only be run at these same points in
the process. Attempting to run Auto-Balance cycles while in the grind or dress process will not be effective,
and likely will worsen rather than improve balance on the grinder.
Setup Overview
Select Balance Mode (Automatic or Manual)
The SB-1000 can be operated in two separate modes, Automatic Balance, or Manual Balance. Automatic
Balance mode uses an SBS Balancer to perform fully automatic balancing operations. Manual Balance mode
uses an RPM sensor instead of the SBS Balancer. In this mode the control acts as a balance analyzer and
directs the user how to manually position balance weights on the spindle assembly to achieve balance. Press
and hold the Setup button for one second to display the balance mode selection screen.
- Automatic Balance Mode
- Manual Balance Mode
The or buttons will change the selected mode. The selected mode is highlighted, with Automatic
mode being selected in the above screen. Press Setup or Manual button to accept the current selection.
Press Cancel to exit selection without saving changes. The next screen displayed will be the first setup
screen in the active mode.
Setup Mode Operation
There are a number of user selectable operating settings for the SB-1000, which are found under the
Setup menu. Press the Setup button to enter the menu of setup options. When the SB-1000 is in setup
mode, the symbol is displayed on the upper left corner of the screen. Setup mode will time out after 1
minute of inactivity and the unit will return to the Main screen without saving any unsaved changes. The
hardwire interface output relays will remain active during setup.
Most settings are represented by symbols that represent the options the user can select between on that
setting screen. When a setting screen is displayed an underline indicates which option is currently set, and
that option symbol will also be highlighted. Either the or buttons can be used to change the
current selection.
Some setting screens require a number to be set. Where a number needs to be entered, the buttons are
used to select the digit to be changed (move the underline). The button increments the number at the
underlined digit, and the button decrements the same digit. Holding the arrow button will start an
accelerating repetition of the button press.
The symbol at the right side of the screen will flash whenever there is unsaved settings data. Data is
saved by pressing either the Setup button or the Manual button.

SBS System – SB-1000 Operation 13
Pressing the Setup button will save data and advance to the next setting in the menu. From the last
setting screen in the menu, the unit will exit setup mode and return to the Main screen. To advance to the
next setting without changing a setting, just press the Setup button without using any arrow buttons.
Pressing the Manual button will save data and exit setup mode, returning to the Main screen.
Pressing Cancel will discard unsaved changes and revert to the previously saved data. If there is no
unsaved data, Cancel will exit setup mode and return to the Main screen.
A display option is available for FPI mode. This setting controls if the current vibration reading is displayed
or hidden (***.*) when FPI mode is activated.
Automatic Balance Mode
Setup Automatic Mode
There are four settings under the Setup button in this mode. These settings are described in the
“Preparing to Set Operating Parameters” section. Each press of the Setup button will present each of
these settings in the following sequence.
The Limit setting is displayed at the first press of the Setup
button. The Limit indicator flashes to emphasize this mode.
The edit range is 0.02 to (Tolerance – 0.2).
The Tolerance setting is displayed at the next press of the
Setup button. The Tolerance indicator flashes to emphasize
this mode. The edit range is (Limit + 0.2) to (Critical – 0.2).
The Critical Vibration setting is displayed at the next press of
the Setup button. The Critical indicator flashes to
emphasize this mode. The edit range is (Tolerance + 0.2) to 99.99.
The Critical RPM setting is displayed at the next press of the
Setup button. The Critical RPM indicator flashes to
emphasize this mode. The edit range is 300 to 30100, and OFF
displays 0.

14 SBS System – SB-1000 Operation
Automatic Balance Operation
From the Main screen press the Balance button to start an Auto-Balance cycle. This screen displays for
the duration of the balance cycle, showing the symbol in the status area of the screen (below the RPM
indication). The Balance cycle can also be started or terminated from the hardwire inputs. A Balance cycle
may be run with an accurate Manual RPM value entered if there is no incoming RPM signal.
The symbol will rock back and forth during the balance cycle to indicate activity, and the Weight
indicators will show + / - to show weight activity and direction. The balance cycle continues until the Limit
setting is reached, or the cycles fails and times out.
Press Cancel to end the balance cycle at any time. Upon completion or termination the display returns to
the Main screen.
Manual Weight Movement - Automatic Balance Mode
The SB-1000 in Automatic Balance also allows the weights in the SBS Balancer to be operated manually.
The ability to move the balance weights is useful for performing diagnostic tests and allows operators to
manually balance machines where needed. From the Main screen press the Manual button to display the
Manual Weight Movement screen, showing the symbol in the status area of the screen.
If an incoming RPM signal is not detected, then this screen will
request a “Manual RPM” value be entered. The RPM value is
changed using the arrow keys.
Press Manual, Setup, or Cancel to go on to balance
mode ( Cancel will not save the new RPM).
The Manual RPM value will be used until an actual RPM signal
is detected, which will then replace it.
The Manual Weight Movement screen can be used to move the weights in a balancer.
The buttons will move one of the balancer weights in the indicated direction. The buttons will
move the other balancer weight in the indicated direction. Pressing a button will cause a 30 ms motion
followed by a short pause, and then the weight will move continuously until the button is released. The
displayed arrow will fill in to show weight activity. Only one weight can be moved at a time.
Cancel will exit setup mode and return to the Main screen, Setup will go to Setup Mode, and
Balance will start an auto balance cycle.