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# Can you Backdrive a harmonic drive?

## Can you Backdrive a harmonic drive?

Back Driving – Harmonic Drive® gears are reversible and can be back driven. If necessary, loads can be held in place by braking the Wave Generator when the servo system is not powered.

What is a harmonic drive reducer?

Harmonic Drive, also called Harmonic Drive gear, harmonic gear, or strain wave gearing, mechanical speed-changing device, invented in the 1950s, that reduces the gear ratio of a rotary machine to increase torque. It operates on a principle different from that of conventional speed changers.

### Where are harmonic drives used?

Uses for a harmonic drive Examples include aerospace applications, robotics, electric vehicles, medical x-ray and stereotactic machines, milling and lathe machines, flexo-printing machines, semiconductor equipment, optical measuring machines, woodworking machines and camera head pans and tilt axes.

What are the advantages of harmonic drive?

Compared to classical toothed gears, harmonic drives have numerous advantages, but there are some disadvantages as well. Their main advantages include: high torque capacity, excellent positioning accuracy and repeatability, compact design, zero backlash, high single-stage reduction ratios and high torsion stiffness.

#### Can you run a gear reducer backwards?

Generally yes, if you use the original output shaft as the new input shaft then you would be achieving the opposite (i.e. converting high-torque input to high-speed output).

Who invented harmonic drive?

inventor Clarence Walton Musser
The unique principle of the HarmonicDrive® was based on a brand new concept. The mechanism was the brainchild of the American inventor Clarence Walton Musser.

## How do you calculate the gear ratio on a harmonic drive?

Total reduction ratio (i) of harmonic drive. 25 x 30 = 750 Ratio = 750:1 Ratio = input speed/output speed Output speed = 1440 rpm of motor / 25 hamonic drive ratio Output speed = 57.6 RPM. Ratio = input speed/output speed Output speed = 57.6 rpm of first stage reduction / 30 hamonic drive ratio Output speed = 1.92 RPM.

What is harmonic drive actuator?

Harmonic Drive® rotary actuators are the easiest solution for your high precision motion control applications. Performance matched precision gearing, motors, and encoders are designed to provide a power dense, cost effective solution.

### Why are harmonic drives used in robotics?

A large number of industrial robots use harmonic drives, especially FANUC and Motoman, due to increased precision and repeatability, no backlash and high torque capacity.

Can you drive a worm gear in both directions?

Single-start worm gears operate in one direction only; due to high friction between the worm and the worm wheel, the worm cannot be driven backwards. This makes worm gears ideal for hoisting operations in which a reversal of transmission direction would be dangerous and/or damaging.

#### What is a speed increaser?

Rj Link Speed Increasers are manufactured in numerous sizes for a variety of products and markets. These custom built gearboxes are designed and built to accommodate high RPM specific components. All are designed with tapered roller bearings and helical gears. Many incorporate customer specific shafts and connections.

What is a harmonic drive?

Image © 2018 EngineeringClicks. The harmonic drive is a type of gear arrangement often referred to as a strain wave gear because of the way it works. It is a kind of reduction gear mechanism consisting of a minimum of three main components.

## What is the difference between the circular spline and flexspline?

Below is an exaggerated two-dimensional diagram demonstrating how the three gear elements engage and rotate. The Flexspline is slightly smaller in diameter and has two fewer teeth than the Circular Spline.

How does the flexspline work?

The Flexspline is a thin cylindrical cup made from alloy steel with external teeth on the open end of the cup. The Flexspline is radially compliant but torsionally is very stiff. When the Wave Generator in inserted into the Flexspline the gear takes on its elliptical shape.

### How are the flexspline teeth advanced?

For every 180 degree clockwise rotation of the Wave Generator the Flexspline teeth are advanced counterclockwise by one tooth in relation to the Circular Spline. Each complete clockwise rotation of the Wave Generator results in the Flexspline moving counter-clockwise by two teeth from its original position relative to the Circular Spline.