The purpose of an Up Travel limit switch is to stop the upward vertical travel of the lift table platform at a specific dimensional height repetitively.
For example if a lift table platform is being raised to match a conveyor line or is used in an indexing application the installation of an Up Travel limit switch ensures that the rising lift table platform stops repetitively at a height established by the limit switch setting.
Without an Up Travel limit switch the operator must visually watch the platform rise and release the Up button just as the lift table platform meets the desired upper height. This can cause inconsistencies in leveling the platform height to the upper level.
These leveling inconsistencies can cause a bump or jarring effect as the product is moved off the raised lift table platform to the upper level. This bump or jarring effect can cause product damage, equipment damage and it also takes extra time for the operator to repeatedly re-adjust the platform height in an attempt to level the platform to the upper height. Equipping the lift table with an Up Travel limit switch eliminates any and all platform leveling concerns by providing repetitive, precise platform positioning.
This link shows a Factory installed Up Travel limit switch. https://www.pentalift.com/solutions/electrical-options-up-travel-limit-switch/
The Up Travel limit switch can be Factory installed and preset to stop the raising platform at a predetermined height (field adjustable) or shipped loose for onsite fitting and installation.
Installing the up travel limit switch does eliminate the lifts ability to achieve its full travel. Upward travel will be consistently limited to the value established by the limit switch.
For additional information on any Pentalift product please contact the Pentalift Sales Department.