Innovative ‘Fast Forward’ mechanism for igus DryLin lead screw drives
04 March 2011
Linear expert, igus UK has introduced DryLin ‘Fast Forward’ – a mechanism that allows quick positional adjustment of the slide on a trapezoidal lead screw drive. This saves considerable amounts of time when adjusting machine settings, particularly in applications that involve long lead screws. The location of the linear slide can still be positioned precisely on the trapezoidal thread using the conventional hand wheel adjustment mechanism.
The ‘Fast Forward’ function on the other hand releases the slide from the thread to enable it to be slid quickly to a new ‘approximate’ position by hand first followed by more precise positioning with the hand wheel.
The lubricant-free DryLin linear tables with ‘Fast Forward’ are available in two types: the SHT series, which is a precise, rigid aluminium version made of machined and anodised aluminium parts; and the SHTP series, a lightweight, low-price alternative made of solid plastic.
The ‘Fast Forward’ function is achieved using an innovative quick-release nut which is released from the thread at the push of the button on top of the slide. Once re-positioned the quick release nut locks back into the thread and acts as a brake bringing the slide to an immediate standstill. This also and particularly applies to vertical applications where it remains fixed in position after locking.
The DryLin Fast Forward action is shown in the illustration. Release the slide from any position on the thread, push it quickly to the new position by hand (1) where it securely locks into place and can be tweaked into its final position via the thread (2).
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