HD65 & HD130 STEPPER DRIVES USER GUIDE 9
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PIN 3 - Zero Phase. The zero phase output is low when the translator is in its primary state. This occurs every 8 steps in the half-step mode, and the signal will therefore go low 50 times per rev. with a 200 step/rev. motor. It corresponds with current flowing from A to B in each motor phase. At switch-on the translator is always reset to the zero phase state. The signal is used when establishing a mechanical reference or "datum" position. Ratings are the same as for the fault circuit. An LED on the front of the drive shows when the translator is in the zero phase state.
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PIN 4 - Boost. Connecting this input to 0v increases the motor current by approximately 30%. The drive is not rated for continuous operation with boost applied, and if the input is held low the current will revert to its normal level after 5 seconds.
PIN 5 - Direction. Taking this input low will reverse the direction of motor rotation. The direction should only be changed when the motor is stationary or running within the start/stop speed range. Do not change the direction signal within 5uS of the low-going edge of a clock pulse.
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PIN 6 - Clock. A low-going transition on this input causes the motor to advance one step. The width of the low-going pulse should be at least 4uS. Ensure that the pulse width is consistent with the maximum input frequency, which can be as high as 100kHz with the microstepping option operating at 2000 steps/rev.
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PIN 7 - Energise. This input enables the motor to be de-energised so that it may be rotated slowly by hand without switching the system off. Switch 9 on the motherboard must be turned off in order to use this facility. The input should then be connected to 0v in order to energise the motor. DO NOT turn the motor at high speed with the drive de-energised as this may overload the power dump circuit. Similarly the drive should not be de-energised whilst the motor is running.
PIN 8 - 0v. Use this terminal as a common return for the control signals.
PIN 9 - 18v AC in. See power connection on page 4. PIN 10 - 0v. Connection for the 18v AC centre tap. PIN 11 - 18v AC in.
PIN 12 - 0v. An additional common return for control inputs.
PIN 13 - Anti-resonance.With this input connected to 0v, the drive operates in its normal chopping mode at all speeds. With the input high or open-circuit, the anti-resonance system is brought into
