Electric cylinder without integrated anti-twist protection [+]

The end positions of an electric cylinder without integrated anti-twist protection [+] are unsecured ex works. No end positions are stored in the electronic nameplate. The current encoder position is undefined and does not match the zero position of the spindle. Therefore, it is mandatory to perform a homing in order to determine the offset position of the encoder from this.

Notice

Damage to the electric cylinder due to incorrect end position

By manually changing the software end positions or the encoder offset in the configuration, the mechanical end positions can be exceeded and the electric cylinder can be damaged.

  • Make manual changes to the software end positions with care

Notice

Damage to the electric cylinder due to missing homing

Commissioning without determining the encoder offset and the software end positions by means of a suitable homing will result in damage to the product.

  • Follow the instructions for commissioning an electric cylinder without integrated anti-twist protection [+]
  • Provide suitable end stops for performing the homing

Mechanics

The end positions of the electric cylinder are no mechanical end stops and must not be used as such. During the homing, the end positions must be secured with external end stops.

►Please refer to chapter Integrated anti-twist protection [+].
►Make sure that the external anti-twist protection is installed.
►Make sure that the electric cylinder does not exceed the external end stops and the end positions during the homing. The information on the position of the end positions can be found in the chapter Technical data.
►The dimensions for determining the zero position of the spindle can be found in dimensional drawing AA3123 and dimensional drawing AA3133.

Software

Carry out the instructions in the operating manual for servo drives:

►Build a new project and choose a target system
►Scan and take over devices
►Transfer parameters to the NC
►Deactivate software end positions in preparation for homing
►Set limited force and limited speed for homing
►Perform homing at low speed and force limitation and determine offset of encoder
►Transfer encoder offset to the servo drive
►Change end positions manually: rear end position: 0 mm, front end position: stroke according to name plate
►Activate software end positions and check NC parameters if necessary
►Check the condition of the plant and activate the project
See also