OPERATIONS MANUAL

12 MONTH LIMITED WARRANTY Limited Use License Agreement YOU SHOULD CAREFULLY READ THE FOLLOWING TERMS AND CONDITIONS BEFORE OPENING THE PACKAGE CONTAINING THE COMPUTER SOFTWARE AND HARDWARE LICENSED HEREUNDER. CONNECTING POWER TO THE MICROPROCESSOR CONTROL UNIT INDICATES YOUR ACCEPTANCE OF THESE TERMS AND CONDITIONS. IF YOU DO NOT AGREE WITH THEM, YOU SHOULD PROMPTLY RETURN THE UNIT WITH POWER SEAL INTACT TO THE PERSON FROM WHOM IT WAS PURCHASED WITHIN FIFTEEN DAYS FROM DATE OF PURCHASE AND YOUR MONEY WILL BE REFUNDED BY THAT PERSON. IF THE PERSON FROM WHOM YOU PURCHASED THIS PRODUCT FAILS TO...

Manual Revision # 1.0 © 2003 Schmitt Industries, Inc. 2765 NW Nicolai St. Portland, OR 97210 USA Phone: (503) 227-7908 Fax: (503) 223-1258 www.schmitt-ind.com

System Purpose A grinding wheel is the cutting tool of a grinding machine. In order for the grinding wheel to accurately cut, produce smooth surface finishes, and generate correct part geometry, it is necessary to prevent vibration in the grinding process. One of the primary causes of vibration in an operating grinding machine, is the existence of imbalance in the grinding wheel. Imbalance is often due to the heterogeneous nature of grinding wheel construction. A wheel contains great numbers of unevenly distributed grains, which cause an intrinsic imbalance. This imbalance will be compounded...

System Theory and Connection The SBS Manual Balancer operates on a principle of mass compensation for a given grinding wheel imbalance. The Intrinsic Imbalance of a grinding wheel is equal to the product of the wheel’s mass multiplied by the distance between the wheel’s center of mass and the wheel’s center of rotation (figure 1). Intrinsic Imbalance Measured Imbalance = r ( BalanceMass ) Weight Figure 2 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 a mass, affixed to the grinding wheel...

Vibration Sensor RPM Sensor Balance Control Unit Vibration Input Figure 4a shows a rotating grinding wheel that is unbalanced, with balancing weights attached. The imbalance is represented by the white dot located on the circumference of the wheel. The other two black dots represent two balance weights located in the wheel hub assembly. The Manual Balance Control calculates the required position of the weights to achieve a triangulation offset which cancels out the imbalance, as shown in Figure 4b. UNBALANCED

Environmental Considerations The SBS Manual Balancer is designed to dynamically correct for grinding wheel imbalance, with its detrimental effects on quality of surface finish, accuracy of shape production, wheel life, and machine bearing life. The system cannot correct for other environmental problems, which may also impact these areas. This section is intended as a discussion of some common environmental problems, which may influence grinding quality and the ability of the SBS Manual Balancer to fully demonstrate its benefits. Other Sources of Vibration A most common source of vibration is...

Balance System Installation SBS Control Unit The SBS Control Unit should be mounted in a location that allows observation of the display by the machine operator. Mounting hardware is available for installation on horizontal surfaces or for rack mounting in standard 19" racks. Cabling connections to the control unit include the Vibration Sensor Cable, the RPM Sensor, the power cord, and hardwire Interface Cable if applicable (see: System Connection diagram). All connections are clearly labeled on the rear of the control unit. Be sure that the proper fuses (Two 3 Amp Time Lag) are installed. (see:...

2. The second general principle is to 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...

Control Unit Operating Instructions The SBS Manual Balancer, once installed, is easily configured to the particular needs of your grinding setup. The following section includes an overview of the control and interface features of the SBS Manual Balancer Control Unit. Front Panel Controls Figure 6 illustrates the controls and indicators on the front panel of the Balance Control Unit. The following is a description of these features: 1) ON/OFF. This button turns on the operating power for the system. When the system is turned on, the unit initiates a Power-On Display, and the green LED to the left...

Balancer Main Screen Elements The following items are elements displayed on the Balancer Card Main Screen (figure 8). a) MENU BAR. The right side of the display is used to indicate the current function of the four corresponding function buttons to the right of the display. This includes menu selections and direction arrows. These function buttons are defined as follows for the main screen of each Balancer Channel. See Function Button Map (figure 12) for an overview of the balancer functions available. Figure 8 MENU – When this button is depressed, the display shows a menu listing with selectable...

Rear Panel Controls Figure 7 illustrates the rear of the control. The following four connections are located on the rear panel of the Balance Control Unit, and are common to any cards installed in the control. Model SB-4500 Rear Panel Figure 7 POWER SUPPLY. Connection for line power input. Caution - before applying power to the Control Unit, make sure the voltage is within specified voltages for the balancer (AC INPUT 90-260, 47-63Hz). FUSE HOLDER. Contains the line fuses. To replace fuses, remove the line plug from receptacle and use a small screwdriver to draw out fuse holder from the plug...