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Text version of the page
| Ratings and Specifications | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| •Allowable Load Moment of Inertia at the Motor Shaft The rotor moment of inertia ratio is the value for a servomotor without a gear and a holding brake. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| • Load Moment of Inertia The larger the load moment of inertia, the worse the movement response. The allowable load moment of inertia (Jl) depends on motor capacity and is limited to within 5 to 30 times the rotor moment of inertia of each servomotor (Jm). This value is provided strictly as a guideline and results may vary depending on servomotor drive conditions. Use the AC servo drive capacity selection program SigmaJunmaSize+ to check the operation conditions. The program can be downloaded for free from our web site (http://www.e-mechatronics.com/) . An overvoltage alarm (A.400) is likely to occur during deceleration if the load moment of inertia exceeds the allowable load moment of inertia. SERVOPACKs with a built-in regenerative resistor may generate a regenerative overload alarm (A.320). Take one of the following steps if this occurs. ■ Reduce the torque limit. ■ Reduce the deceleration rate. ■ Reduce the maximum speed. ■ Install an external regenerative resistor if the alarm cannot be cleared using the steps above. Refer to Regenerative Resistors on page 339. Regenerative resistors are not built into SERVOPACKs for 400 W motors or less. External regenerative resistors are required when this condition is exceeded or if the allowable loss capacity (W) of the built-in regenerative resistor is exceeded due to regenerative drive conditions when a regenerative resistor is already built in. •Allowable Radial and Thrust Loads Design the mechanical system so thrust and radial loads applied to the servomotor shaft end during operation fall within the ranges shown in the table. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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