SideWise is a simple anti-side-pull system that ensures loads are only lifted vertically. It can easily be retrofitted to existing cranes and consists of a sensor unit mounted on the rope with a signal processing module in the hoist control box. Crane motion is disabled as soon as any long or cross-travel horizontal loads are detected.
Cranes and hoists are only designed to withstand vertical loading. Out-of-vertical hoisting, commonly referred to as side-pulling, damages wire ropes and rope guides, because the wire jumps out of its grooves as it winds around the drum and rubs against itself or the drum. In more severe cases, side pulling causes derailment of the trolley or gantry or excessive lateral loads on the crane structure resulting in catastrophic beam failure. This may occur when moving loads far smaller than the SWL.
|SW100||SideWise System (Sensor + Processor)|
|SWS100||SideWise Sensor Only (Modified to suit size at time of order)|
|SWP100||SideWise Processor Only|
The SideWise Processor is designed to be installed on a 30mm DIN rail. The sensor head is clamped to the rope at the dead end. Dimensions of both are provided in the following diagrams.
|Mounting||Clamped directly on rope||30mm DIN Rail|
|V(limit)||Output relay voltage rating||60||VAC|
|I(limit)||Output relay current rating||0.5||2||A|
# Extended operation at maximum temperature will reduce device life.
Side-pulling is the second most danagerous misuse of cranes (after overloading). Cranes and hoists are only designed to withstand vertical loading. Side-pulling can cause damage to ropes and rope guides, as well as potentially derailing trolleys or gantries resulting in dropped loads.
A number of serious international side-pulling incidents resulted in legal action and received significant attention from the media and work safety authorities.
If rope guides are failing prematurely (more than 1 every 5 years) then your crane is being side-pulled.
SideWise senses both the angle and rate change of angle to determine when a side-pull event occurs. When it does, motion in the direction of travel as well as hoisting is disabled until the side-pulling stops.
Clamp the two halves of the SideWise sensor unit to the rope at the dead end and screw up the bolts. Install the signal processing unit in the crab hoist. Wire the normally closed relay outputs in series with the coils of the appropriate contactors. (You will need spare cores on the catenary cable if the long travel motions are to be interrupted by the SideWise unit.) Finally, wire the sensor to the processor (only 3 wires), calibrate the side pull and you're done!
You can install the sensor so that it allows the rope to slide through. A length of M8 threaded rod connects the sensor block to the trolley.
SideWise sensors can be fitted to any wire rope. They are adjusted to fit at time of ordering to suit actual rope diameter.
No. Propriatery signal processing ensures that swinging loads will not cause false triggers.