convert the results to digital values and capture them with a computer. A motor is more difficult to tune. There is no direct indication of speed: you have to measure the time between encoder pulses to determine how fast the motor is turning. Figure 5.22 shows the block diagram of two simple circuits that can be used as an aid for tuning motor parameters. Figure 5.22A shows a circuit that mea- sures the period between encoder pulses. A clock increments a counter. Each encoder pulse latches the count into a register and resets the counter. The counter can use synchronous or asynchronous reset, although the reset logic obviously has to match the counter characteristics. The output of the register can be connected to a logic analyzer so the speed data can be captured, or it can connect to the input of a DAC to provide a 132 Analog Interfacing to Embedded Microprocessors Figure 5.22 Motor-timing analysis aid.
the fluid specification and type. Having rotate the wheel. Repeat this check by holding cable with a smear of grease. determined whether the transmission is of the the inner joint and attempting to rotate the 3 Check the security and operation of all early or later type, refer to "Lubricants and driveshaft. Any appreciable movement hinges, latches and locks, adjusting them indicates wear in the joints, wear in the where required. Where applicable, check the fluids" for the fluid requirement. Under no driveshaft splines or loose retaining nut. operation of the central locking system. circumstances may the later type fluid be used
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