Laser pointer offset

Some lasers have a separate low-power red-dot pointer for approximate placement without firing the main beam. Because that pointer is physically separate from the main laser, its path can be slightly offset from the actual burn position.

This page applies only to a separate alignment pointer. A low-power preview made by the main laser follows the actual beam path and does not have this fixed mechanical pointer offset.

Current Beam Bench limitation

Beam Bench stores laser_offset_x and laser_offset_y in machine-profile data, but the current planner and framing path do not apply them. Device Settings does not expose these values, and the Cuts/Layers panel has no Job Origin compensation control.

Changing Job Origin or translating the design affects framing and the job together, so neither action cancels the physical separation between a red-dot pointer and the main beam. Treat an unadjusted pointer as approximate only.

What you need

• A piece of scrap material.
• Calipers.
• A low test-power setting that safely leaves a visible mark on that material.
• ~10 minutes.

Follow the laser manufacturer's enclosure, ventilation, eye-protection, and operating instructions throughout the test.

Measure the physical offset

1. Secure the scrap material so it cannot move.
2. Create a small crosshair or rectangle.
3. Mark that shape with the main laser at the lowest power that leaves a clear result. Do not use full power for this test.
4. Without moving the material or pointer mount, frame the same shape using the separate red-dot pointer.
5. Measure the X and Y distance from the burned path to the pointer path.
6. Repeat the test. A repeatable non-zero difference is the physical pointer offset.

Correct or work around it

The preferred correction is mechanical: follow the machine manufacturer's instructions to adjust the red-dot pointer mount until its path matches the low-power test mark. Repeat the measurement after tightening the mount.

If the pointer cannot be adjusted accurately:

• Use a calibrated fixed camera for visual placement.
• Use a manufacturer-approved low-power main-beam verification method only when the machine, enclosure, firmware, and operating procedure support it.
• Otherwise, use the red-dot pointer only for rough placement and allow enough margin for the measured offset.

Do not enter the measurement into an unrelated control or translate the design as a permanent compensation. Those changes do not make the pointer and beam share the same path.

Verify the result

Repeat the low-power mark and pointer-frame comparison at several bed locations. The pointer path should match the marked path within the tolerance required by your work. Recheck after the pointer, laser head, mirrors, lens, or mount is serviced or moved.

When this matters

• Precision placement work where you align by eye (positioning a logo on a pre-printed surface, engraving over a feature).
• Camera-based alignment is independent of the red-dot pointer because the camera maps the workspace rather than the pointer path.

When it does not

• Most general-purpose engraving where you place the material against a stop or jig.
• Workflows where you rely on the camera overlay for placement.

Related

• Device Settings dialog
• Camera panel: alternative placement method
• Frame and preview