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MOONS’
MSSTAC6 Step Motor Drive User Manual
MOONS’
www.moons.com.cn
motor at a slow speed (1 rev/sec) with different gain and phase values until the desired effect is achieved.
If the values are not known or determined, gain and phase may be set at 0.
If the Encoder Stall Prevention feature will be used, the maximum lead angle and the speed at which
the timing advance peaks need to be entered. This will allow the drive to know when it is producing
maximum torque.
A typical motor produces maximum torque at low speeds with a 90° lead angle. To
produce maximum torque at higher speeds, the lead angle must be increased because of inductance and
back emf. Above a certain speed, further increases in lead angle produce no benefit, so the drive must know
when to stop advancing the timing. In the example below, the lead angle is increased steadily from 90° at
low speeds to 135° at 40 rev/sec, so you would enter "135 degrees at 40 rev/sec", as shown above.
If you are not using Stall Prevention, these values are not needed by the MSSTAC6.
2.2.4
Motion
Digital Positioning Mode
