| 摘要 |
PURPOSE:To ensure the correction of the maximum-value display errors due to the backlash of a gear train, by providing a correcting-pulse inputting means in addition to external input pulses, and inputting the pulses of specified number. CONSTITUTION:When external input pulses are inputted to an input terminal 26 of a correcting-pulse inputting means 25, a DFF254 outputs the external input pulses in synchronization with pulses from a pulse generating circuit 253. Meanwhile, a counter circuit 251 divides the frequency of the external input pulses and outputs one pulse for the number of the external input pulses of, e.g., 128. The pulse width is set by the counter circuit. The pulse is sent to a 3-input OR gate 255. The gate 255 adds one frequency-divided pulse for every specified number of 128 pulses of the external input pulses, which are sent through the DFF 254. The result is applied to a pulse motor. Therefore, the number is incremented even though backlash is present in a gear train. The maximum value does not become negative errors, and the correction can be performed. |
