Slew Limiters

Excavator Safety & Productivity
Slew Limiter

Slew Limiter

There are two types of Slew Limitation.
Simple Angular Slew whereby the Slew left and Slew right of the machine are monitored and controlled.
Virtual Wall is a more complex Slew Limitation whereby both the slew of the machine and extension are monitored and controlled.
XWatch Safety Solutions, Xwatch Safety, Xwatch, XW1, XW2, XW3, XW4, XW5, XWTele, XWFork, Rated Capacity Indicator, RCi, Rated Capacity Limiter, RCL, Height Limiter, Height Limitation, Height Restrictor, Slew Limiter, Slew Limitation, Slew Restrictor, Envelope Control, Ai, Sphere 24, Sphere 24 Ltd
Slew Limitation is included in the following solutions
XW3 Brochure XW4 Brochure XW5 Brochure

XW3 - Basic Angular Slew Limiter

XWatch Safety Solutions, Xwatch Safety, Xwatch, XW1, XW2, XW3, XW4, XW5, XWTele, XWFork, Rated Capacity Indicator, RCi, Rated Capacity Limiter, RCL, Height Limiter, Height Limitation, Height Restrictor, Slew Limiter, Slew Limitation, Slew Restrictor, Envelope Control, Ai, Sphere 24, Sphere 24 Ltd

XW4 - Height & complex Slew Limiter, inc. virtual wall

XWatch Safety Solutions, Xwatch Safety, Xwatch, XW1, XW2, XW3, XW4, XW5, XWTele, XWFork, Rated Capacity Indicator, RCi, Rated Capacity Limiter, RCL, Height Limiter, Height Limitation, Height Restrictor, Slew Limiter, Slew Limitation, Slew Restrictor, Envelope Control, Ai, Sphere 24, Sphere 24 Ltd

XW5 - 'RCi', Height & complex Slew Limiter, inc. virtual wall

XWatch Safety Solutions, Xwatch Safety, Xwatch, XW1, XW2, XW3, XW4, XW5, XWTele, XWFork, Rated Capacity Indicator, RCi, Rated Capacity Limiter, RCL, Height Limiter, Height Limitation, Height Restrictor, Slew Limiter, Slew Limitation, Slew Restrictor, Envelope Control, Ai, Sphere 24, Sphere 24 Ltd

Angular slew limiting

Angular slew limiters use two points.  One to the left and the other to the right that extend outwards from the centre of the machine.  Minimum and maximum reach is not monitored or controlled. Using proportional control, the machine equipment is kept within these pre-set limits.  To achieve his a motion cut is applied to the following two functions; Slew left & Slew right.

On a standard mono machine how many motion cuts will I require?

Function Required No. Boom up Boom down Dipper in Dipper out Slew left Slew right
Height Limitation 2 * *
Slew Limitation 'Angular' 2 * *
Slew Limitation 'Virtual wall' 6 * * * * * *
Rated Capacity Indicator 'RCi' 0
Rated Capacity Limiter 'RCL' 4 * * * *

Virtual wall slew limiting

More advanced Slew Limiters use virtual wall technology to deliver improved envelope control.  Ideal for working on or next to highways or railways, operators can easily set singular, dual-point virtual walls to avoid multiple hazards in busy environments, improving Safety and Productivity. Using proportional control, the machine equipment is kept within these pre-set limits.  To do this a motion cut is applied to the following six functions; Slew left & Slew right; Boom up & Boom down; Dipper In & Dipper out. Due to the number of motion cuts installed to meet the requirements of virtual wall Height Limitation is generally included and if required minimum, maximum reach and depth giving full-envelope control.

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