This technical note describes concepts of geared and direct drive motors. Inertia ratio and gear equations are provided. Geared motor challenges are discussed and the solution to those challenges,...

This technical note reviews mechanical resonance issues associated with inertial loads driven by framed motors via compliant couplings and frameless motor advantages. The mechanical system is modeled,...

The basic methodology is to calculate the individual torques required for all segments of a motion profile. The largest of the individual torque values is the Peak Torque. Each torque value is...

This paper discusses the effect of servo drive Pulse Width Modulation (PWM) frequency on heat generating current ripple in a permanent magnet motor. The basic idea of PWM is introduced and the RL...

This paper reviews the concept of Functional Safety as it relates to machinery. The design steps for a safe machine are outlined and the methodology for determining appropriate PL/SIL safety ratings...

Correctly sizing a servomotor and drive power supply is critical to optimizing system cost. Power supply capacity is important in battery-powered mobile applications. To size servo drive power...

This paper discusses absolute encoder interfaces commonly used in brushless motor control systems. The concept of encoder latency is presented. SSI, BiSS-C®, DRIVE-CliQ and several versions of...

For semiconductor equipment, motors are essential components, and are used in various systems such as indexing (theta) tables and wafer-handling robots. Motor torque is extremely important, but to get...

This technical note describes optimal motor sizing process for a servo motor. A motor model is provided, and thermal issues are discussed. Torque speed curves and typical load torques are reviewed....

Understanding resolution, accuracy and repeatability is critical to specifying a position sensor. This paper defines these terms and discusses how they relate to overall system performance. It is...

An understanding of grounding, shielding and interface signaling is critical to the successful installation of servo drives and servo motor systems. This paper reviews the different grounds found in a...

The heat generated during servo motor operation poses significant challenges to system integrators. This paper presents a review of passive motor cooling, the pros and cons of liquid and forced-air...