Vertical protection for an automatic pallet lift

Challenge
A pallet lift that connects several floors in a production building is to be protected against unauthorized or unintentional access during operation. At the same time, it should be possible to insert or remove pallets from the lift without triggering the safety device. There was very little mounting space available on the lift.

Application Solution
The automatic pallet lift is protected using the S3000, the only safety laser scanner approved for vertical protection at the time of installation. The device was installed at a height of around 3 m directly on the frame of the pallet lift. The floor is used as the reference contour. Two protective fields, one behind the other, monitor the lift opening and detect the direction of travel. When a pallet is loaded, the S3000 safety laser scanner detects the pallet based on the geometry taught; the pallet is transported into the lift. A person will not have the same rectangular dimensions as a loaded pallet and is reliably detected because the geometry is different to the geometry known to the scanner. If a pallet is to be moved out of the “paternoster”, the protective field is switched so that a movement in this now reversed direction is allowed.

The pallet lift is reliably protected using the safety laser scanner, without hindering the flow of material. The evaluation of the object contour makes it possible to reliably differentiate between man and material. Also with the vertical protection, not just a protective field, programmed only once, is monitored, its reference contours are also checked continuously. If the device adjustment changes in operation, this contour will change and the S3000 safety laser scanner stops the machine.

This is an application from SICK.
Tri-Phase Automation is a SICK distributor in Wisconsin.
Contact Tri-Phase Sales or Get A Quote

Protection of the handling area of gantry cranes

An S3000 protects the handling area on gantry cranes between printing presses and a printing cylinder store.

Challenge
In a large printing works, the approx. 6 m deep handling area for a gantry crane must be protected. The area is also crossed by people. An existing, high maintenance sensor solution, that often requires adjustment and can only be reactivated manually after interruption of the protective field, is to be replaced with a more cost-effective, automatically re-starting, low maintenance system.

Application Solution
The SICK S3000 safety laser scanner is setting a new technological standard and provides a high level of security of investment. Improved performance data and integrated functions provide the user with more benefits. Less mounting and wiring effort, less space required, and in comparison to the past, minimized maintenance effort on the safety system are considered to be significant advantages by this user.

This is an application from SICK.
Tri-Phase Automation is a SICK distributor in Wisconsin.
Contact Tri-Phase Sales or Get A Quote

SICK DME5000 laser distance measuring sensor

Protection field switching of rail-guided transport trolley for rolls of paper independent of position and direction using DME5000.

Challenge
For a rail-mounted truck that travels in two directions, a precise and robust system was sought for switching between and activating the protective fields of two safety laser scanners mounted on the truck.

Application Solution
Two SICK DME5000 laser distance measurement systems mounted on the truck are used. When the truck is moving, the two sensors continuously measure (redundantly in the related direction) the time taken by the light pulses emitted to travel to the end of the track and back. From this information the electronics determine the position of the truck and provide this information to the truck’s PLC over Profibus. The data are processed in the PLC and the related binary signals generated. These signals are used for protective field switching on the laser scanners.

The proximity switches originally used for the protective field switching did not last long, as the switching lugs for the proximity switches were bonded to the floor and were frequently damaged by the fork lift trucks in the building. The DME5000 + PLC solution has proven to be extremely reliable in comparison. Furthermore, the measurement accuracy is extraordinarily high at +/- 2 mm with a reproducibility of 0.5 mm. A current measured value is output every millisecond – it is hardly possible to measure distances more precisely in such applications.

This is an application from SICK.
Tri-Phase Automation is a SICK distributor in Wisconsin.
Contact Tri-Phase Sales or Get A Quote