FM Desktop Technical Support

Support for the FM Desktop fiber marker: the owner’s manual, the first checks for mark contrast, focus, and lens selection, and the marking guides.

Manuals & guides

Owner’s ManualPDF · 8.7 MB

The manuals linked above cover this machine.

Start here

Pick your symptom.

The three common paths for marker support: mark contrast, no mark, and focus or lens selection.

Symptom

Mark Too Light / No Contrast

Low contrast is usually power, frequency, speed, or focus height — not a hardware fault.

Adjust power, frequency, and speed together.
Confirm focus height for the material.
Test on scrap before committing to the part.

Marking Guide

Symptom

Not Firing / No Mark

No mark at all points to the source, interlocks, or red-dot alignment before any parameter change.

Check the source and safety interlocks.
Confirm red-dot alignment to the mark area.
Verify emission and Q-switch settings.

Contact Support

Symptom

Focus & Lens Selection

The lens sets your field size and spot. Match the lens and Z height to the part before troubleshooting the mark.

Match the lens to the field size you need.
Set the correct Z / focus height.
Confirm focus with the gauge or ramp test.

Lens Guide

Guides & videos

Support references.

Direct support resources for marking — not a generic blog feed.

Marking vs. Engraving

When to mark, anneal, or engrave — and how each reads on metal and plastic.

Open Guide

Lens & Field Size

Pick the F-theta lens and field that match your part and the detail you need.

Open Guide

Common questions

FM Desktop FAQs.

Frequent questions for this specific model.

Which manual covers my FM Desktop?

Use the FM Series owner’s manual linked at the top of this page — it covers the fiber marking systems, including safety, operation, and maintenance.

My mark is too light — what do I change?

Start with power, frequency, and speed together, then confirm focus height for the material. Test on scrap before running the part.

What lens do I need for my field size?

A larger field size needs a longer focal-length F-theta lens, while a smaller field with a shorter lens gives a finer spot and more detail. Match the lens to the part in the lens and field-size guide.

Need a technician?

Contact Boss Laser support.

Include your serial number, a photo of the mark, the material, the lens, and settings, and which quick checks you completed.

Contact Support