Name: P70360-SDN Kollmorgen P7000 Series AC Stepper Drive
Price: 5224 CNY
Availability: InStock

Description

P70360-SDN Anti-Resonance
Step motors are highly resonant, which results in vibration and ringing. The ringing utilizes a large fraction of the motor’s available torque – thereby wasting performance. Furthermore, at mid-range velocities, the resonance can become so severe that the motor looses synchronization and stalls. The P7000 drives provide robust anti-resonance control to stop the vibrations and maintain equilibrium. This feature requires that the drive be configured with respect to the total inertia in the system. The rotor inertia and the Loadto-Rotor inertia ratio are set in the Mechanical screen. If set improperly, the effectiveness of the feature may be diminished. The anti-resonance check box is used to invoke or disable the feature. It should be enabled unless the system configuration either does not need it or cannot tolerate it. A system with loose couplings or viscous loading generally does not need this feature. If a system has compliant (springy) coupling and is absent appreciably viscosity, it may not respond well to the active, anti-resonant loop in the drive. The anti-resonant feature is not designed to damp such a 4th order system. If the application of antiresonance results in degradation or instability, it should be disabled (unchecked).
Frequency Break frequency of anti-resonance tuning filter. Typically set to 1/10 the resonant frequency of the motor.

P70360-SDN Current Reduction
Unlike a servo system, the step motor is left energized – even at rest. This leaves full torque available to oppose external disturbing influences and hold position precisely. However, many applications encounter vanishingly small load effects at rest and may benefit from the reduction of current when not moving. The reduced level is programmed as a percent of full current and the time delay is entered in milliseconds (ms). The drive will gently reduce the current to the programmed value after the motor has been at rest for a specified time. If the box is left unchecked, the numeric entries have no effect and full current is maintained at rest.
Motor heating is proportional to the square of the current. Thus, a reduction of 70% current represents a reduction to 50% power. Current reduction has little effect as long as the resting motor is not opposing a continuous torque as in lifting applications. If a disturbing torque is present, the current reduction will result in a small amount of movement. The current vector is restored to full value the instant an incoming step is received or the move engine begins a move
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P70360-SDN PDF
P70360-SDN

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