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By Master Mechanical DESIGN
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Motor Selection Parameters for Ball Screw Actuators
š Key parameters for motor selection include required driving torque, desired rotational speed, and the necessary accuracy of motor rotational angle.
āļø The driving torque calculation primarily depends on the axial load (F) and the ball screw lead (P), using the formula .
š For the specific example (Axial Load = 680 N, Lead = 10 mm, efficiency ), the calculated driving torque is 1.95 Newton-meter (Nm).
Motor Type Selection Rationale
š¤ For high accuracy and control requirements, a servo motor is generally recommended, although it is more costly.
āļø If high precision is not critical, a stepper motor can be chosen as a less expensive alternative.
š£ļø It is crucial to consult with an electrical design engineer as they better understand the application's programming and control needs.
Servo Motor Catalog Review and Final Selection
ā After calculating the required speed as 2400 RPM, a servo motor was selected based on catalog data.
š The initial rated torque of 1.91 Nm was deemed too close; therefore, a motor with a rated torque of 2.39 Nm was chosen by applying a safety factor.
š” The selected motor (Model SGM7J-08A) has a rated speed of 3,000 RPM, which accommodates the required 2400 RPM.
Key Points & Insights
ā”ļø The driving torque calculation for a ball screw actuator relies heavily on axial force and lead size, independent of the rotational speed.
ā”ļø Always overspecify the motor torque (using a safety factor) above the calculated requirement to ensure system reliability, leading to a selection of 2.39 Nm over the required 1.95 Nm.
ā”ļø The final motor choice (servo vs. stepper) balances cost against the required positioning accuracy, necessitating collaboration between mechanical and electrical design teams.
šø Video summarized with SummaryTube.com on Nov 20, 2025, 02:39 UTC
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Full video URL: youtube.com/watch?v=sihkNhfwD30
Duration: 9:24
Get instant insights and key takeaways from this YouTube video by Master Mechanical DESIGN.
Motor Selection Parameters for Ball Screw Actuators
š Key parameters for motor selection include required driving torque, desired rotational speed, and the necessary accuracy of motor rotational angle.
āļø The driving torque calculation primarily depends on the axial load (F) and the ball screw lead (P), using the formula .
š For the specific example (Axial Load = 680 N, Lead = 10 mm, efficiency ), the calculated driving torque is 1.95 Newton-meter (Nm).
Motor Type Selection Rationale
š¤ For high accuracy and control requirements, a servo motor is generally recommended, although it is more costly.
āļø If high precision is not critical, a stepper motor can be chosen as a less expensive alternative.
š£ļø It is crucial to consult with an electrical design engineer as they better understand the application's programming and control needs.
Servo Motor Catalog Review and Final Selection
ā After calculating the required speed as 2400 RPM, a servo motor was selected based on catalog data.
š The initial rated torque of 1.91 Nm was deemed too close; therefore, a motor with a rated torque of 2.39 Nm was chosen by applying a safety factor.
š” The selected motor (Model SGM7J-08A) has a rated speed of 3,000 RPM, which accommodates the required 2400 RPM.
Key Points & Insights
ā”ļø The driving torque calculation for a ball screw actuator relies heavily on axial force and lead size, independent of the rotational speed.
ā”ļø Always overspecify the motor torque (using a safety factor) above the calculated requirement to ensure system reliability, leading to a selection of 2.39 Nm over the required 1.95 Nm.
ā”ļø The final motor choice (servo vs. stepper) balances cost against the required positioning accuracy, necessitating collaboration between mechanical and electrical design teams.
šø Video summarized with SummaryTube.com on Nov 20, 2025, 02:39 UTC
Find relevant products on Amazon related to this video
Review
Shop on Amazon
Mechanical And
Shop on Amazon
Ensure System
Shop on Amazon
Best Review
Shop on Amazon
As an Amazon Associate, we earn from qualifying purchases

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