4VM81-220-6
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The 4VM81-220-6 servomotor delivers a rated speed of 3100 RPM, a rated torque of 0.56 Nm, a rated voltage of 30 volts, and a maximum pulse current of 46 amps. As part of the Low Inertia PMDC Servomotors series by Pacific Scientific, it boasts a continuous stall torque of 0.586 Nm and a thermal resistance of 0.47 °C/W.
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Product Description:
The 4VM81-220-6 is a DC analog tachometer developed by Pacific Scientific. The tachometer is designed to deliver precise speed feedback in systems requiring stable motor monitoring. The tachometer supports continuous duty cycle applications and integrates effectively with motion control setups in industrial automation.
The 4VM81-220-6 DC analog tachometer functions with an input voltage of 220 VDC and consumes 0.6 amps of current from its armature. It can provide 7.2 oz-in of rated torque and operates at 1800 RPM. The device functions at its best in temperatures up to 40 degrees Celsius and has an insulation class B grade. The motor can be used with a rear tachometer coupling because of its face mount design and single shaft extension. For easier installation identification, the light blue enclosure has silver end plates that are color-coded. Ripple stays within 1.5% peak-to-peak, and the terminal resistance is rated at 50 ohms. The ripple measurement disregards variations in drive speed and is based on an assumption of a 10kΩ load. The uninterrupted operation is made possible by the continuous time rating. Although it is not explicitly stated, the motor constant (Kt) can be calculated by analyzing the torque and current readings. If the seal is damaged, the warranty will be voided because it allows internal access.
The 4VM81-220-6 analog tachometer is configured for face installation, meeting the application's normal standards. At 2.5 V/KRPM, the tachometer maintains a steady voltage. The shaft can be directly coupled to feedback systems due to its single end. The motor can continue to run continuously due to the duty cycle. Improved control system integration is achieved by stabilizing the output signals with the voltage constant. When subjected to a load, the internal electrical behavior is defined by the terminal resistance.
Frequently Asked Questions about 4VM81-220-6:
Q: Why does 4VM81-220-6 use 220 VDC input voltage?
A: It provides stable analog signal output that is required for consistent tachometer feedback systems. Voltage supports accurate speed measurement.
Q: How does 4VM81-220-6 maintain low 1.5% ripple?
A: Ripple remains low due to regulated internal design and load requirements. This enhances feedback clarity in analog systems.
Q: Why does 4VM81-220-6 have a 7.2 oz-in torque?
A: The torque value supports precision in feedback output. It reflects torque under rated speed and current conditions.
Q: Does 4VM81-220-6 allow continuous duty operation?
A: Yes, the motor supports uninterrupted operation without time-based derating. This makes it suitable for long-cycle feedback tasks.
Q: Why does 4VM81-220-6 use 50 Ohms terminal resistance?
A: The resistance stabilizes current flow across terminals. It controls voltage drop and helps in signal conditioning.
