Each axis of NC machine is driven by a stepper motor drive with a lead screw. The pitch of lead screw is p mm. The step angle of stepper motor per pulse input is α degrees/pulse. The ratio of gear drive in stepper motor drive is g (number of turns of the motor for each single turn of the lead screw). The number of pulses required to achieve a linear movement of x mm is

• A. \(\frac{{\alpha g}}{{360p}}x\)
• B. \(\frac{{360g}}{p}x\)
• C. \(\frac{g}{{360p}}x\)
• D. \(\frac{{360g}}{{p\alpha }}x\)