Editing Travel (section)

===Implementation===
Various techniques are available to provide an overtravel region. For example, [[foam and foil]] switches actuate when the foil disc reaches the PCB; above the disc is a foam "overtravel pad" (hence "foam and foil"), that allows the switch to keep moving even though the disc has reached the PCB. The foam compresses, allowing the key to be pressed further after the foil disc reaches the PCB.

The bridge contact system in [[RAFI RS 76 M (illuminated)]] also permits the [[slider]] to continue moving beyond the point that the contacts close. The movable contact strip is supported from above by spring, so that the slider can continue moving after movable contact strip reaches the stationary contacts.

[[Stacked spring]] switches include an overtravel region by way of triggering a second spring, or a dome, to snap into place under spring pressure before the slider has come to a stop.