# Functions

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In CenterFind mode, the rotary laser automatically attempts to align the laser beam with the centre line of the laser receiver by moving the rotary head up and down.

If the rotary laser is in the horizontal position, the laser beam can be aligned in relation to the X-axis of the rotary laser, to the Y-axis or to both axes at the same time see Determining inclination with CenterFind mode.

If the rotary laser is in a vertical position, it is only possible to align it to the Y-axis.

## Starting CenterFind mode:

1. Position the rotary laser and laser receiver so that the laser receiver is situated in the direction of the X-axis or the Y-axis of the rotary laser.
2. Align the laser receiver so that the required axis is at a right angle to the reception area (54).
3. If the laser beam is aligned to both axes, then place a laser receiver connected to the rotary laser in the direction of the X- and Y-axis respectively.

Each laser receiver must be situated within the pivoting range of ±8.5 % of the rotary laser.

4. Switch on the rotary laser in rotary operation.

LR 65 G: In the settings menu, the centre function must be set to CenterFind mode (CF).
When aligning to two axes of the rotary laser, this applies to both laser receivers.

1. Starting CenterFind mode for the X-axis: Either press and hold the button or press and hold the button together with the button.
2. Starting CenterFind mode for the Y-axis: Press and hold the button together with the button.

If the laser beam is to be aligned with both axes simultaneously, CenterFind mode must be started separately on each laser receiver.

After starting CenterFind mode, the rotary head moves up and down on the rotary laser. During the search process, CFX (X‑axis) or CFY (Y‑axis) appears in the text display (n).

If the laser beam hits the reception area (54) at the height of the centre line of the laser receiver, the centre line indicator (q) will appear and XOK (X axis) and YOK (Y axis) will appear in the text display (n). The value of the incline that is found is displayed on the rotary laser. CenterFind mode is ended automatically.

## Cancelling CenterFind mode:

1. Press and hold the button.

## Troubleshooting:

If the laser beam was unable to find the centre line of the laser receiver within the pivoting range, ERR appears in the text display (n) and all LED direction indicators light up.

1. Press any button on the rotary laser and one on the laser receiver to close the error messages.
2. Reposition the rotary laser and laser receiver so that the laser receiver is situated within the pivoting range of ±8.5 % of the rotary laser.

Ensure that the laser receiver is aligned to the X-axis or Y-axis so that the laser beam can pass through the reception area (54) horizontally.

1. Then restart CenterFind mode.

LR 65 G: If both axes of the rotary laser are to be aligned with a laser receiver, the same centre function must be set on both laser receivers. A combination of CenterFind mode and CenterLock mode is not possible.

If CenterLock mode is already set on one axis and CenterFind mode is started on the other axis, ERR and CL appear alternately in the text display (n).

1. Set CenterFind mode on both laser receivers and restart the function.

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Using CenterFind mode, the inclination of a surface can be measured up to a maximum of 8.5 %.

1. To do this, set up the rotary laser at one end of the inclined surface in a horizontal position on a tripod.

The X- or Y-axis of the rotary laser must be aligned with the inclination to be determined.

2. Switch on the rotary laser and allow it to level in.
3. Secure the laser receiver to a measuring rod (78) with the holder.
4. Place the measuring rod near to the measuring tool (at the same end of the inclined surface).
5. Align the height of the laser receiver on the measuring rod so that the laser beam of the rotary laser is indicated as "centred" ➊.
6. Then place the measuring rod with the laser receiver at the other end of the inclined surface ➋.

Make sure that the laser receiver remains in the same position on the measuring rod.

7. Start CenterFind mode for the axis that is aligned with the inclined surface.

1. After CenterFind mode is completed, the inclination of the surface is displayed on the rotary laser.

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In CenterLock mode, the rotary laser automatically attempts to align the laser beam with the centre line of the laser receiver by moving the rotary head up and down. In contrast to CenterFind mode, the position of the laser receiver is continuously checked and the inclination of the rotary laser is automatically adjusted. No inclination values appear on the display of the rotary laser.

Alignment is possible for the X‑axis and Y‑axis both when the rotary laser is in a horizontal position and when it is in a vertical position.

## Starting CenterLock mode:

1. Position the rotary laser and laser receiver so that the laser receiver is situated in the direction of the X-axis or the Y-axis of the rotary laser.
2. Align the laser receiver so that the required axis is at a right angle to the reception area (54).
3. If the laser beam is aligned to both axes, then place a laser receiver connected to the rotary laser in the direction of the X- and Y-axis respectively.

Each laser receiver must be situated within the pivoting range of ±8.5 % of the rotary laser.

4. Switch on the rotary laser in rotary operation.

1. In the settings menu of the laser receiver, set the centre function to CenterLock mode CL.

When aligning to two axes of the rotary laser, this applies to both laser receivers.

2. Starting CenterLock mode for the X-axis: Either press and hold the button or press and hold the button together with the button.
3. Starting CenterLock mode for the Y-axis: Press and hold the button together with the button.

If the laser beam is to be aligned with both axes simultaneously, CenterLock mode must be started separately on each laser receiver.

After starting CenterLock mode, the rotary head moves up and down on the rotary laser. During the search process, CLX (X‑axis) or CLY (Y‑axis) appears in the text display (n).

If the laser beam hits the reception area (54) at the height of the centre line of the laser receiver, the centre line indicator (q) and the text display (n) LOC will appear. On the rotary laser, the CenterLock symbol is displayed on the start screen for the corresponding axis.

In the event of changes to the position of the laser receiver or rotary laser, the inclination is automatically adjusted on the rotary laser.

- When working with CenterLock mode, ensure that the rotary laser and laser receiver are not moved unintentionally. The automatic adjustment of the inclination with every change in position can lead to incorrect measurements.

## Cancelling/ending CenterLock mode:

1. Press and hold the button.

If the laser beam was already successfully aligned with the centre line of the laser receiver at this point, the inclination set on the rotary laser is retained even if CenterLock mode is cancelled.

## Troubleshooting:

If the laser beam could not find the centre line of the laser receiver within 2 minutes (regardless of whether at the start of the mode or after position changes), ERR appears in the text display (n) and all LED direction indicators light up.

1. Press any button on the rotary laser and one on the laser receiver to close the error messages.
2. Reposition the rotary laser and laser receiver so that the laser receiver is situated within the pivoting range of ±8.5 % of the rotary laser.

Ensure that the laser receiver is aligned to the X-axis or Y-axis so that the laser beam can pass through the reception area (54) horizontally.

1. Then restart CenterLock mode.

If both axes of the rotary laser should be aligned to a laser receiver, the same centre function must be set on both laser receivers. A combination of CenterLock mode and CenterFind mode is not possible.

If CenterFind mode is already set on one axis and CenterLock mode is started on the other axis, ERR and CF appear alternately in the text display (n).

1. Set CenterLock mode on both laser receivers and restart the function.

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The laser receiver has electronic filters for strobe light. The filters protect against, for example, interference from the warning lights of construction machinery.