kubler blog

Absolute Shaft Copying - Linear Measuring System for 100% Slip-Free Measurement.

Kubler
Linear Measuring SystemThe sensors manufacturer Kübler has been supplying for many years encoders to the major players of the elevators industry. The concept "everything from one source" led Kübler to develop a new linear measuring system for absolute shaft copying.
New standards apply since September 1st, 2017 for all passenger and cargo elevators. The standards EN 81-20 and EN 81-50 have entered into force. Focus is set on increased safety for elevator users, installers, inspection personnel and service technicians. Therefore, the demands placed on the elevators industry have increased. Kübler's linear measuring system is the answer to the new standards; it supports the elevator and control manufacturers in the implementation.
 
Exact positioning / 100 % slip-free measurement
Kübler's linear measuring system is mounted directly on the elevator car. It ensures permanent absolute position measure-ment, which is required, among others, for the accurate ap-proach at the desired floor. Thanks to the absolute position feedback, no referencing trip is required after a power outage, as absolute position values are available at any time with a 1 mm resolution over the whole travel height of up to 392 me-ters. Measuring errors due to vibrations and dynamic rope ef-fects can occur during continuous elevator operation. Thanks to the direct mounting of Kübler's measuring system, this is guaranteed.
 
Robust and extremely compact The sensor housing out of aluminum and the stainless steel tape ensure reliable operation. This shaft copying system is based on a particularly wear-free contactless measuring principle that guarantees long service life and fulfills the measurement quality required by the target application.
It is the most compact measuring system for absolute shaft copying (135 x 45 x 33 mm). The system can be used without any problem in tightest installation spaces for retrofits, modernizations, e.g. in existing buildings / elevator shafts or for new installations.
 
The Installation – a child's play
The very simple installation of this measuring system is an absolutely unique feature. The mounting set consists of two fastening angles, the rolled-up stainless steel tape and a spring element required for pretensioning the tape in the shaft pit. There are no specific points to consider when mounting the system, as the stainless steel tape forgives scratches or kinks made during installation. The measuring system is installed in a few minutes. This saves much time and money.
 
The optimal solution for every requirement
The measuring system is offered in three possible combinations with the interfaces (SSI, CAN, CANopen, RS485 and CANopen Lift) relevant in the elevator industry:
LEB, Basic variant
LES, Safe variant
LES, Safe variant + evaluation unit + UCM module
 
The Safe variant of the measuring system is SIL3 certified and TÜV approved, and it covers a wide range of elevator and safe-ty functions:
inspection run up & down, direct drive-in, stop point shift, unintended car movement (UCM), and many others.
 
Eliminating additional sensors saves costs 
With Kübler's linear shaft copying system many elevator shaft components become superfluous. This considerably reduces complexity and installation time.
Conventional elevator systems require many magnetic switches for measuring the absolute positions, and this results in long installation times, huge maintenance needs and complex trouble-shooting in case of a failure.
 
Advantages at a glance:
- Simpler installation
- Less components in the elevator shaft
- Reduced complexity
- Faster troubleshooting in the event of a failure
- Higher plant availability – less maintenance
- Overall costs reduction