xTool F2 Ultra UV Glass Settings: Flat Glass & Rotary Chart (2026)

Q: Why did my glass crack?

Too much energy, internal stress in the blank or tempered glass. Lower power, raise speed and test on a spare first.

Sourced xTool F2 Ultra UV glass settings for frosted surface engraving on flat glass, pint glasses and wine glasses, plus focusing tips, glass types and fixes.

October 28, 202616 min read

On this page

Quick answer: the best starting settings
xTool F2 Ultra UV glass settings chart
What creators found on video
Watch the best tests
Photo engraving on glass
Setup tips from the videos
What results to expect
Why UV works on bare glass
Which glass works (and which to avoid)
Focusing on glass: the step that matters most
Step-by-step: engraving flat glass
1. Check the lens
2. Clean
3. Support it
4. Focus
5. Test
6. Engrave
Engraving wine glasses and cups with the rotary
Inner engraving (3D inside glass)
Troubleshooting
FAQ
What are the best xTool F2 Ultra UV glass settings?
Do I need to coat glass before UV engraving?
Why won't autofocus work on glass?
Can the F2 Ultra UV cut glass?
Which glass types work best?
Can it engrave inside glass?
Why did my glass crack?
Should I lower the focus when engraving glass?
Should I warm glasses before engraving?
Is one pass or two passes better for glass photos?
Do I need the rotary for wine glasses?
Final thoughts
Sources

Last updated: October 28, 2026

Desktop UV laser engraver with a frosted engraved wine glass and the title xTool F2 Ultra UV Glass Settings A UV laser frosts bare glass directly, with no paint or marking spray. (AI-generated illustration, generic machine.)

Quick facts

Machine: xTool F2 Ultra UV, 5W, 355 nm UV galvo laser
Frosted glass (light): 35% power, 300 mm/s, 1 pass, 600 DPI (community)
Frosted glass (strong): 90% power, 150 mm/s, 1 pass (community)
Glass cup text (rotary): 80% power, 125 mm/s, 300 lines/cm, 40 kHz (GeekExtreme test)
Coating needed? No
Focus depth on glass: only about 2–3 mm (xTool)
Autofocus: put paper or masking tape on the glass first, then subtract its thickness
Max glass cutting thickness: 1 mm (xTool lab data)
Avoid: tempered and laminated glass
Creator tip: lower focus 1–4.5 mm below the measured surface, then test (YouTube)

Quick answer: the best starting settings

For flat glass, start at 35% power, 300 mm/s, 1 pass, 600 DPI.

For a brighter, heavier frost, try 90% power, 150 mm/s, 1 pass.

For text on a cup in the rotary, a tested starting point is 80% power, 125 mm/s, 300 lines/cm, 40 kHz.

Focus matters more than any number here. Get the focus right before you change power.

xTool F2 Ultra UV glass settings chart

Item	Power	Speed	Passes	DPI / LPC	Frequency	Rotary	Source
Clear glass, light frost	35%	300 mm/s	1	600 DPI	not stated	No	Bonny Creations (community)
Clear glass, mark	80%	200 mm/s	1	not stated	not stated	No	Bonny Creations (community)
Clear glass, strong frost	90%	150 mm/s	1	not stated	not stated	No	Bonny Creations (community)
Soda-lime cup, text	80%	125 mm/s	1 (shown on screen)	300 LPC	40 kHz	Yes (RA3, Chuck mode, shown on screen)	Chris from L3D, YouTube (also cited by GeekExtreme)
Soda-lime cup, photo	94%	751 µs dot duration, Jarvis (shown on screen)	1	505 DPI	40 kHz	Yes (RA3, Chuck mode)	Chris from L3D, YouTube
Curved whiskey glass (curve mapping)	100%	100 mm/s	1	500 LPC	40 kHz	Roller rotary, Curved material mode, Scanning (shown on screen)	The Clack Shack, YouTube
Cup, rotary (vector)	90%	180 mm/s	1	300 LPC	40 kHz, bi-directional (shown on screen)	Yes (Chuck mode; focus 137.3 → 133.0 mm, shown on screen)	Revved Up Design, YouTube
Glass, rotary RA3	90%	190 mm/s	not stated	500 LPC	default	Yes (RA3)	Maker Foundry, YouTube
Shot glass (vector)	75%	100 mm/s	1	300 LPC	40 kHz, bi-directional (shown on screen)	No (flat, bare on slats, shown on screen)	Utinni Designs, YouTube
Glass disk, tested best	80%	160 mm/s	1 (shown on screen)	300 LPC	40 kHz, bi-directional (shown on screen)	No (flat, thickness 21.2 mm, shown on screen)	DAYGONE LASERCRAFT, YouTube
Flat glass photo (2 passes)	94%	748 µs dot duration, Jarvis (shown on screen)	2	505 DPI	40 kHz	No (flat, thickness 53.6 mm, shown on screen)	Chris from L3D, YouTube
Shot glass photo	85%	500 µs dot duration, Jarvis (shown on screen)	1	600 DPI	40 kHz	No (flat; focus 49.2 → 48.2 mm, shown on screen)	Utinni Designs, YouTube
Glass bottles, mirrors	80%	500 mm/s	not stated	500 LPC	not stated	not stated	LaserGenerator chart (starting point)

Note: Settings vary by glass batch. GeekExtreme saw identical settings work on one pint glass and fail on another cup. Always test on a spare.

What creators found on video

We watched 14 F2 Ultra UV glass videos and read their transcripts. Settings below are what each creator said on screen; timestamps jump to the moment.

Channel	Video	Material	Settings	Result / tip
Chris from L3D	Rotary Glass Engraving Tutorial	Tapered pint glass, RA3 chuck	Text: 80%, 125 mm/s, 300 LPC, 40 kHz. Photo: 751 µs dot duration, 94%, 505 DPI, Jarvis, 1 pass, 40 kHz; Chuck mode, Auto adjust and Image correction on (shown on screen)	Paper on glass for focus, then subtract 0.1 mm (136.2 → 136.1)
Chris from L3D	Perfect Glass Photo Engravings	Flat glass, photo	748 µs dot duration, 94%, 505 DPI, Jarvis, 40 kHz, 2 passes; thickness 53.6 mm (shown on screen)	1 pass "nice", 2 passes "excellent"; about 13 min 20 s for 2 passes. Framing light at 10 for clear glass
Revved Up Design	Glass Engraving Tutorial	Tapered glass, full wrap, Chuck mode	90%, 180 mm/s, 1 pass, 300 LPC, 40 kHz (shown on screen)	Defocus 4.5 mm down (137.3 → 133). Set the design before changing height, as the camera re-captures. Warm glass first
Maker Foundry	Engrave Glass with RA3 + Settings	Glass, 256 mm circumference	90%, 190 mm/s, 500 LPC, default frequency, bi-directional	No crosshatch needed
Maker Foundry	Calibration + First Test on Glass	Flat glass	100%, 190–195 mm/s, 500 LPC, 40 kHz	"No fracturing"; looked good from the back too
The Clack Shack	Curved Surface Glass Engraving	Whiskey glass, roller rotary, Curved material mode	100%, 100 mm/s, 1 pass, 500 LPC, 40 kHz	10 × 10 measurement points over 54 × 54 mm; two glasses cracked on earlier runs (thin text); tape used for framing, removed before engraving
Utinni Designs (Justin Jacobs)	Shot Glasses Workshop	Shot glasses	Vector: 75%, 100 mm/s, 1 pass, 300 LPC, 40 kHz, bi-directional. Image: 500 µs dot duration, 85%, 600 DPI, 1 pass, 40 kHz, Jarvis	Drop focus about 1–1.5 mm; if it fails, drop 0.5 mm more, but go back up if over 2 mm below. On screen: a solid, even frosted white result
DAYGONE LASERCRAFT	UV Laser vs Glass	Glass disk on painter's tape	xTool preset 90%, 300 mm/s, 300 LPC; test best 80%, 160 mm/s, 300 LPC, 40 kHz	Ran a material test array; crisp, even frosted result and test grid shown on screen; save working settings as a user material
COPPER GROVE CREATIONS	Step-by-Step Tutorial	Tequila glass	90%, 300 mm/s, 1 pass, 300 LPC, 40 kHz	48-second job for a small add-on design
Cleveland Laser Engraving	Glass Engraving: Easier Than You Think	Perfume bottle	not stated	Being 1 mm off can stop it engraving; caliper read 34 mm vs auto-measure 35 mm, so they used 34
Seams Legit	Engraving on glass	Square glass bottle	xTool "clear soda lime glass" preset (values not stated)	White paper on glass to measure height; gold pigment fill
The Crafty Blog Stalker	3D Inner Engraving	K9 crystal block	xTool preset (values not stated)	Must be K9 crystal; fit riser and inner-engraving lens
David Hawke	Polish Embossed Glass	Embossed glass bottle	not stated	Embossed glass came out dull and sharp-edged; a polishing wheel helped only partly
xTool	Glass Master	Glass	not stated	Brand promo: no coating, "no chipping, no stress marks" (manufacturer claim)

Verified from the video: we checked the xTool Studio settings panel in 7 clips (Chris from L3D ×2, Revved Up Design, Utinni Designs ×2, DAYGONE LASERCRAFT, The Clack Shack). The narrated values matched the on-screen values in all 7.

Patterns across creators:

Most vector settings sit at 75–100% power, 100–300 mm/s, 300–500 LPC, 40 kHz.
Lowering focus is the most repeated tip, from 0.1 mm (paper thickness) to 4.5 mm.
Cracks happened in testing (The Clack Shack), usually on fine graphics pushed too hard.

Watch the best tests

DAYGONE LASERCRAFT runs a material test array and lands on 80% power, 160 mm/s. (Video: DAYGONE LASERCRAFT on YouTube.)

Full RA3 rotary set-up on a tapered pint glass, from focus to settings. (Video: Chris from L3D on YouTube.)

Shot glasses at 75% power, 100 mm/s, with the "drop the focus" method explained. (Video: Utinni Designs on YouTube.)

Photo engraving on glass

Creator	Dot duration	Power	DPI	Dither	Passes	Focus	Source
Chris from L3D	748–751 µs	94%	505	Jarvis	1–2	Surface (paper method, −0.1 mm)	Video, shown on screen
Utinni Designs	500 µs	85%	600	Jarvis	1	1 mm below surface (49.2 → 48.2 mm)	Video, shown on screen

Two passes gave Chris from L3D his best photo finish, at about double the time.
Frequency was 40 kHz in both.

Setup tips from the videos

Paper on glass for framing and focus. Lay white paper on the glass so the camera and framing can see it (Chris from L3D, Seams Legit). Subtract its thickness, about 0.1 mm.
Painter's tape on the edges. DAYGONE LASERCRAFT held a glass disk in place with 4 pieces of painter's tape.
Remove the tape on curved glass. The Clack Shack used tape for framing, then carefully removed it before engraving.
Curved material mode with a 3D surface map for uneven glass: The Clack Shack sampled 10 × 10 points into a point-cloud map.
Chuck mode for tumblers and tapered glasses. Chris from L3D and Revved Up Design both used Chuck mode on the rotary.
Framing light at 10% so you can see the outline on clear glass (Chris from L3D).

What results to expect

A frosted white mark. UV breaks the surface into a fine frost that scatters light.
More passes darken the frost. Bonny's notes say extra passes make the mark stronger.
Steady results. In GeekExtreme's side-by-side test, the F2 Ultra UV engraved bare glass with more repeatable results than an IR laser that needed coating.
Job time. Their rotary cup job took about 13 minutes 26 seconds.

Why UV works on bare glass

Short wavelength. At 355 nm the beam can break chemical bonds instead of only heating the surface.
Less heat. Reviewers call it "cold", but the spot still gets very hot. The fair claim is less heat damage than IR or diode, not zero heat.
No prep. No tempera paint, no marking spray and no clean-up step.

Which glass works (and which to avoid)

Glass type	Typical items	How it engraves
Soda-lime	Wine glasses, pint glasses, bottles	Best starting material
K9 crystal	Awards, crystal blocks	Engraves well; also used for inner engraving
Borosilicate	Lab glass, coffee gear	May not engrave (xTool); may need more energy (Maker's Chest)
Quartz	Optics, lab ware	May not engrave (xTool)
Tempered	Shower glass, screen protectors	Avoid. Can shatter
Laminated	Safety glass	Avoid (xTool)

Focusing on glass: the step that matters most

Shallow focus. xTool says the effective focal depth on glass is only about 2–3 mm.
Autofocus can't see clear glass. Lay paper or masking tape on the surface, autofocus, then subtract its thickness.
Masking tape is about 0.5 mm. If autofocus reads 119.2 mm, set 118.7 mm (xTool example).
Still not marking? Lower the focus by 1–2 mm and try again (xTool).
Big pieces over about 100 mm: add passes and lower the focus a little each pass, because of field-lens curvature (xTool).
Creators go lower still. On video, drops of 1–1.5 mm (Utinni Designs) and 4.5 mm (Revved Up Design) gave the best marks on their machines.
Measure with calipers. Cleveland Laser Engraving trusted a 34 mm caliper reading over a 35 mm auto-measure.
Warm up. Run the machine for about 5 minutes first, or about 20 minutes if the room is 10–15°C (xTool).

Focus the surface before you trust a power number. The method is in How to Focus a UV Laser Correctly. Build the squares the way How to Calibrate the xTool F2 Ultra UV describes. What to reorder is in Best UV Laser Blanks to Buy and Sell. A repeatable position is the point of self-centering jigs for the F2 Ultra UV, and the smoke is the point of inline fans for the F2 Ultra UV. If you are still choosing the machine, start with the desktop UV laser buying guide.

Step-by-step: engraving flat glass

1. Check the lens

Use the surface-engraving lens, not the inner-engraving lens.

2. Clean

Wipe the glass with isopropyl alcohol to remove fingerprints and grease.

3. Support it

Put the glass on the slatted panel so the beam can't mark the baseplate.
Glass 5 mm or thinner: support it by the edges so the material under it isn't engraved (xTool).

4. Focus

Use the tape or paper method above.

5. Test

Run a small grid on a spare piece. Start at 35% / 300 mm/s.

6. Engrave

Set your design position before changing height: the camera re-captures and the preview can shift (Revved Up Design).
Run 1 pass. Add a pass only if the frost is too light.

Engraving wine glasses and cups with the rotary

Clear drinking glass in a rotary chuck with masking tape on top for focusing Masking tape gives autofocus a surface to read on clear glass. (AI-generated example.)

Rotary needed. The RA2, RA2 Pro and RA3 work, but none is included with the machine (xTool).
Measure where you engrave. Measure the perimeter at the exact spot you'll engrave, especially on tapered glasses.
Level the glass. Use the mini level so the engraving area is parallel to the ground.
Curve limit. The height difference across the engraving area must not exceed 0.75 mm (xTool).
Tape, measure, remove, subtract. Tape the top of the glass, auto-measure, remove the tape and subtract about 0.5 mm.
RA3 users: pick RA3 Manual Mode. A cup spinning the wrong way usually means RA2 was selected (GeekExtreme).
Framing light: raise framing brightness so you can see it on clear glass.
Lid: with the rotary fitted, the lid may not seal fully, so wear UV safety glasses.

Inner engraving (3D inside glass)

Needs the inner-engraving lens and suitable glass, usually K9 crystal (xTool).
The inner work area is 70 × 70 mm (Tom's Hardware specs).
Wrong power, too much speed or the wrong pulse frequency can stop the effect from forming (xTool).
Exact inner-engraving power and speed: not stated in our sources. Use xTool Studio's presets.

Troubleshooting

Problem	Likely cause	Fix
No mark at all	Focus off, or wrong lens	Refocus with tape, check surface lens, lower focus 1–2 mm
Patchy frost	Glass not level or dirty	Re-level, clean with isopropyl alcohol
Faint on one side of large piece	Field-lens curvature	Extra pass, lower focus each pass
Cracks or chips	Too much energy or stressed blank	Lower power, raise speed, change blank
Marks on the baseplate	Beam through thin glass	Use slatted panel, support by edges
Cracks on thin text	Fine graphics hit too hard	Lower power on fine text; test first (The Clack Shack)
Can't see framing on clear glass	Framing light too dim	Raise framing light power (Chris from L3D uses 10)
Cup rotates backwards	Wrong rotary mode	Select RA3 Manual Mode

FAQ

What are the best xTool F2 Ultra UV glass settings?

A community starting point for a frosted mark is 35% power, 300 mm/s, 1 pass, 600 DPI. For a stronger frost, try 90% power at 150 mm/s.

Do I need to coat glass before UV engraving?

No. The 355 nm UV beam marks bare glass directly. Diode and IR lasers usually need paint or a coating.

Why won't autofocus work on glass?

Light passes through clear glass. xTool says to put paper or masking tape on the surface, autofocus, then subtract its thickness.

Can the F2 Ultra UV cut glass?

xTool's lab data lists a maximum glass cutting thickness of 1 mm. No sourced cutting settings were found, so treat cutting as experimental.

Which glass types work best?

Soda-lime glass and K9 crystal engrave most reliably. xTool warns that tempered, laminated, quartz and borosilicate glass may not engrave.

Can it engrave inside glass?

Yes, with the separate inner-engraving lens and K9 crystal. Not every clear glass works for inner engraving.

Why did my glass crack?

Too much energy, internal stress in the blank, or tempered glass. Lower power, raise speed and test on a spare first.

Should I lower the focus when engraving glass?

Many creators do. On video, drops of about 1–1.5 mm (Utinni Designs) up to 4.5 mm (Revved Up Design) gave better marks. Test on one glass first.

Should I warm glasses before engraving?

Revved Up Design warms glasses until just warm to the touch, saying cold glass is more likely to fracture.

Is one pass or two passes better for glass photos?

Chris from L3D says one pass gives nice results and two passes excellent ones, at about double the time.

Do I need the rotary for wine glasses?

Yes, for engraving around a cup. xTool supports the RA2, RA2 Pro and RA3, and the rotary is not included with the machine.

Final thoughts

Start flat glass at 35% power and 300 mm/s, and cups at 80% and 125 mm/s. Most failures are focus, not power. Use the tape trick, stick to soda-lime or K9, and test every new batch of blanks.

Sources

Bonny Creations, Glass on the F2 Ultra UV: https://www.bonnycreations.com/settings/machines/xtool-f2-ultra-uv/glass
Bonny Creations, F2 Ultra UV settings: https://www.bonnycreations.com/settings/machines/xtool-f2-ultra-uv
xTool Support, Glass Surface Engraving Techniques: https://support.xtool.com/article/2898
xTool Support, Tips for Surface Engraving Glass Cups Using Rotary Attachments: https://support.xtool.com/article/3095
xTool Support, Start Inner Engraving: https://support.xtool.com/article/2708
xTool Support, Processing Parameters for F2 Ultra UV: https://support.xtool.com/article/2699
xTool Support, F2 Ultra UV FAQs: https://support.xtool.com/article/2870
xTool Support, Use RA3 with F2 Ultra UV: https://support.xtool.com/article/2703
GeekExtreme, UV laser engraver for glass, tested settings: https://www.geekextreme.com/uv-laser-engraver-for-glass-tested-settings/
Tom's Hardware, F2 Ultra UV review: https://www.tomshardware.com/maker-stem/xtool-f2-ultra-uv-dual-laser-engraver-review
The Maker's Chest, UV laser engraving on glass: https://themakerschest.com/blogs/laser-engravers/uv-laser-engraving-on-glass-settings-results-and-what-you-can-actually-achieve
LaserGenerator, xTool settings chart: https://lasergenerator.com/laser-settings/xtool/
FSL, Introduction to UV laser glass marking: https://www.fslaser.com/support/material-settings-and-tips/introduction-to-uv-laser-glass-marking-a-comprehensive-guide
Arcus CNC, Laser marking glass and ceramics: https://arcuscnc.com/laser-marking-glass-and-ceramics/
Chris from L3D, Rotary Glass Engraving Tutorial (YouTube): https://www.youtube.com/watch?v=KfDqz01BBTo
Chris from L3D, Perfect Glass Photo Engravings (YouTube): https://www.youtube.com/watch?v=wFfkd8OPIPg
Revved Up Design, Glass Engraving Tutorial (YouTube): https://www.youtube.com/watch?v=mIhXKLHZcIs
Maker Foundry, Engrave Glass with RA3 + Settings (YouTube): https://www.youtube.com/watch?v=OdLEPF3sKEw
Maker Foundry, Calibration + First Test on Glass (YouTube): https://www.youtube.com/watch?v=IZ9t9wvYI3c
The Clack Shack, Curved Surface Glass Engraving (YouTube): https://www.youtube.com/watch?v=FOmxKIn1CGE
Utinni Designs, Shot Glasses Workshop (YouTube): https://www.youtube.com/watch?v=-Xw3CmrQB-4
DAYGONE LASERCRAFT, UV Laser vs Glass (YouTube): https://www.youtube.com/watch?v=fdbe71oYI1A
COPPER GROVE CREATIONS, Step-by-Step Tutorial (YouTube): https://www.youtube.com/watch?v=wksbu76GmQA
Cleveland Laser Engraving, Glass Engraving Tutorial (YouTube): https://www.youtube.com/watch?v=tcukPHS9uAg
Seams Legit, Engraving on glass (YouTube): https://www.youtube.com/watch?v=4IOUpmHsT50
The Crafty Blog Stalker, 3D Inner Engraving (YouTube): https://www.youtube.com/watch?v=oVJffAqRI_w
David Hawke, Polish Embossed Glass (YouTube): https://www.youtube.com/watch?v=nUX0dAUuSkk
xTool, Glass Master (YouTube): https://www.youtube.com/watch?v=uC1tl5QepbM

Related settings

All material settings

Keep reading

Desktop UV laser engraver with a navy powder-coated tumbler on a rotary and the title xTool F2 Ultra UV Tumbler Settings

Material Settings

xTool F2 Ultra UV Tumbler Settings: Powder-Coated & Stainless (2026)

Sourced xTool F2 Ultra UV tumbler settings for powder-coated and bare stainless tumblers on the rotary: power, speed, lines per cm, frequency and the focus offset trick.

October 28, 20269 min read

Desktop UV laser engraver marking a black slate coaster with the title xTool F2 Ultra UV Slate Settings

Material Settings

xTool F2 Ultra UV Slate Settings: Power, Speed & Frequency Chart (2026)

Sourced xTool F2 Ultra UV slate settings for power, speed, passes, lines/cm and frequency, plus a test-grid method, photo tips and troubleshooting.

October 28, 202610 min read

Desktop UV laser engraver with an engraved black 3D printed PLA plate and the title xTool F2 Ultra UV PLA Settings

Material Settings

xTool F2 Ultra UV PLA Settings: 3D Print Colour Chart (2026)

Sourced xTool F2 Ultra UV PLA settings for marking 3D prints by filament colour: power, speed, lines per cm and frequency, plus tips, safety and troubleshooting.

October 28, 20268 min read