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Acmer · Diode
Acmer K1 · 7W
Middle K1: enclosed 2.4 kg mini diode for engraving, with light cutting of thin wood
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Last updated How we evaluate
Released September 2025
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Showing specs for: 7W
TL;DR
The K1 7W is the middle version of Acmer's enclosed mini engraver: same 150 × 150 mm area, 2.4 kg box, lid and tilt sensors and exhaust fan as the other versions, for $229.99. It engraves wood, leather, paper and dark acrylic at a reasonable pace and cuts thin wood with several passes. Acmer's chart gives up to 10 mm of plywood, without stating the number of passes.
Best for
What makes this machine stand out
Hardware and workflow features worth understanding before you buy : not just wattage on a label.
Balanced for engraving
Engraves a 10 × 10 cm photo on plywood in about 18–26 min in our benchmark profile, with light cutting as a bonus.
Enclosed box under $250
Lid sensor, tilt sensor and exhaust fan in a closed box sold $229.99 on Acmer's store.
Our verdict
Ideal if you
The 7W is the middle ground of the K1 line: noticeably faster engraving than the 3.5W and enough power for occasional cuts in thin wood, in the same enclosed 2.4 kg box. For gifts, coasters, leather tags and paper projects, it covers most needs.
Skip if you
Cutting stays slow and the 150 × 150 mm area limits it to small objects. There is no camera, Wi-Fi or auto-focus, and the cutting chart is a manufacturer claim without the number of passes.
Pros
- Good balance for engraving: about 18–26 min for a 10 × 10 cm photo on plywood in our benchmark profile
- Enclosed box with lid and tilt sensors for $229.99
- Cuts 3 mm basswood with a few passes, enough for occasional tags and ornaments
Cons
- Cutting is slow: about 8–14 min for a 10 × 10 cm square in 3 mm basswood in our benchmark profile
- No camera, Wi-Fi or auto-focus
- 150 × 150 mm area: small objects only
What this machine is for
Enclosed small-item engraving at home, with occasional cutting of thin wood
7W module · Acmer K1
Laser spot size
0.08 × 0.08 mm
Motion precision: 0.01 mm
Sample engrave job
~18–26 min
10 × 10 cm (4 × 4 in)
Sample cut job
~8–14 min
10 × 10 cm (4 × 4 in)
Reference benchmark: same job size on every machine so you can compare times fairly. Times are estimates for the reference job above; your design complexity and settings will change them.
Materials
- · Wood & plywood
- · Paper & card
- · Leather
- · Dark acrylic
- · Cork & bamboo
- · Coated metal
Accessories & add-ons
Typical inclusions and add-ons for this profile : confirm your SKU.
- Included
Enclosure / cabinet
- Optional
Laser safety glasses
Still useful when servicing or with lid open
- Recommended
Fire extinguisher
Editorial guidance : not a live parts list. See also: Ventilation setup · Safety basics
Practical notes
Beginner notes
This profile is the 7W version of the Acmer K1. Compare it with the 12W: pick the 7W if you mostly engrave and cut only now and then; box, area and software are identical. For engraving alone, the 3.5W saves $30.
Pro tips
For cuts, use several passes at moderate speed rather than one very slow pass, and keep the lid closed so the fan clears smoke. Start from the ACMER Studio presets and fine-tune power on scrap of the same material.
Pro / technical specsRaw numbers for experienced users comparing machines.
- Max speed (spec)
- 167 mm/s (10,000 mm/min)
- Avg engrave speed
- 60–120 mm/s
- Avg cut speed
- 2–5 mm/s
Common questions
Can the K1 7W cut wood?
Thin wood, yes, with several passes. Acmer's chart gives up to 10 mm of plywood without stating speed or passes; our benchmark profile cuts a 10 × 10 cm square in 3 mm basswood in about 8–14 min. Beyond 3 mm, cutting gets slow.
K1 7W or K1 12W?
For $40 more ($269.99 against $229.99 on Acmer's store, October 2026), the 12W roughly halves cutting time and engraves wood a little faster. If you mostly engrave, the 7W is enough.
Can the K1 7W engrave metal?
Only coated or painted metal, by removing the coating. Bare stainless steel or aluminum needs an infrared or fiber laser, which the K1 does not offer.
Alternatives to the Acmer K1 7W
Machines in the same space, picked from our database by type, price, and score.
Creality · Diode · $269 – $299
The Falcon A1C 5W puts Creality's 5W diode in the same closed Class 1 box as the 10W: 150 × 150 mm bed, motorized lifting platform, auto-focus. It is an engraving machine first: cork, bamboo, leather, slate and plywood look sharp, but cutting is limited to card and thin wood. The 10W module can be added later.
Sculpfun · Diode · $270
Sculpfun S10 10W (2022) is a mid-size open-frame engraver with a sturdier industrial frame than S9, ~385 mm work area, and detachable laser cover. Positioned between budget S9 and S30 families for makers who want better rigidity without Ultra pricing.
Creality · Diode · $119
Creality Falcon 5W is the 5W version of the CR-Laser Falcon: the same 400 × 415 mm open frame as the Falcon 10W with half the laser power. Fine for engraving and thin crafts at a very low price; cutting is slow.