| Description of "STOP BAND": The Analog Interface Board has a "STOP BAND" (zero speed zone). If the magnitude ot the input signal lies within this "STOP BAND", the motor will not rotate. The "STOP BAND" Is required for proper operation of the optional electronic F-B-R Board, and cannot be eliminated by adjusting the MIN trim potentiometer on the driver board. The "STOP BAND" is illustrated in Fig. 8. Without an Electronic Forward-Brake-Reverse (F-B-R) Board, a positive or negative speed signal outside the "STOP BAND" (zero speed zone) will cause the motor armature to rotate clockwise, provided the motor armature leads are wired according to instructions. Outside the "STOP BAND", speed will be directly proportional to the applied signal. If an Electronic F-B-R Board (Model 890) Is used, positive speed signals produce counterclockwise rotation, and negative signals produce clockwise rotation. Description of "BRAKE POINT': The BRAKE POINT (Fig. 8) Is of concern only when the optional Electronic F-B-R Board (Model No. 890) is used. If you are not planning to use the Electronic F-B-R Board, you may skip this section. Note that the "BRAKE POINT" (the voltage or current level at which dynamic braking will be activated, if the optional Electronic F-B-R Board is used) lies with the "STOP BAND". To stop the motor with dynamic braking, do one of the following: 1. For a positive speed input voltage (VJ, lower Vin until it is between Vbiake and - Vatop. 2. For a negative speed input voltage, increase Viri until it is between Vb[ake and + Vslop. 3. For a positive speed input current (lm), lower ljn until it is between lbrake and -| , 4. For a negative speed input current, increase \in until it is between lbmke and +lslop. Tostop the motor without dynamic braking, do one ofthe following: 1. For a positive speed input voltage (VJ, lower Vjn until it is between Vbrake and +Vslop. 2. For a negative speed input voltage, increase V|n until it is between Vbrak9 and -Vstop. 3. For a positive speed input current (IJ, lower liri until it is between lbrako and +lslop, 4. For a negative speed input current, increase ljn until it is between lbfllw and -lslop. |