When the feed drive is shut down, the vertical and oblique slide units are held in place by a brake. Since the drives are not self-locking, the slide unit can, when the brake is released, move downwards under its own weight and cause a collision. When carrying out maintenance work, secure the slide unit before releasing the brake.
Risk of injury from rotating bellows coupling and swiveling A-axis after the clamping screw on the bellows coupling is slackened. Secure the slewing shaft of the A-axis from both sides with clamping jaws before you slacken the clamping screw on the bellows coupling.