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BF-1D Encoder Backstep Filter
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| In certain applications involving machine control, the designer has chosen a simple tachometer encoder to send position information to the logic circuit. This approach is valid when the machine only moves in one direction. However, if the machine has any backlash, this backward motion can be interpreted as a forward motion, resulting in a buildup in position error.
The BF-1D is intended to alleviate this design problem. First, the tachometer will need to be replaced with a quadrature optical encoder. The BF-1D is wired between the encoder and the input of the machine control system. It will pass all forward motion pulses of the encoder and block all pulses resulting from backward movement. If any backward movement has occurred, all subsequent forward counts will be blocked until the backward movement has been compensated. In other words, all machine backlash will be compensated for and only forward progress from the encoder will be passed to the control system. [User's Manual] FEATURES 1. Differential or single-ended input and output to allow connection to virtually any encoder. 2. Low current draw (RS-422 output not included) 3. Mounting is simple using 4 each 4-40 machine screws 4. Electrical connections through industry standard terminal block requires no soldering. 5. Selection of either X1, X2 or X4 quadrature decoding. 6. Maintains exact position of machine encoder while sending only pertinent (forward motion) information to machine control system. 7. Output is selectable between pulse and square-wave to allow greater adaptability between various encoders and machine control systems. 8. Features are field selected via onboard jumpers. |
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