What is Backlash?

Definition

The mechanical free play or lost motion between meshing gear teeth or coupled components. Backlash introduces positioning errors in servo and CNC systems and must be compensated in the controller or eliminated mechanically.

Related Terms

Anti-backlash

A mechanical design feature that eliminates free play between gears, lead screws...

Gearbox

A mechanical speed reduction or increase device that connects a motor to its dri...

CNC Controller

A specialized computer that interprets G-code instructions to control the moveme...

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