ComMarker B4 60W JPT MOPA Fiber Laser vs GWEIKE G2 Pro 30W Fiber Laser Engraver
Head-to-head spec comparison to help you pick the right fiber laser for your needs.
ComMarker
$1099
GWEIKE
$799
Spec-by-Spec Comparison
| Spec | ComMarker B4 60W JPT MOPA Fiber Laser | GWEIKE G2 Pro 30W Fiber Laser Engraver |
|---|---|---|
| Wattage | 60 W | 30 W |
| Laser Type | MOPA | Q-Switched |
| Laser Source | JPT | Raycus |
| Work Area (W) | 175 mm | 150 mm |
| Work Area (H) | 175 mm | 150 mm |
| Galvo Speed | 10000 mm/s | 15000 mm/s |
| Color Marking | Yes | Yes |
| LightBurn | Yes | Yes |
| Autofocus | No | No |
| Weight | 5.5 kg | 6.5 kg |
| Software | LightBurn + EZCad2 (LightBurn requires COR file setup) | LightBurn + EZCad2 |
| Pulse Width | 2–500ns | N/A (Q-Switched, 20–200kHz frequency range) |
| Price | $1099 | $799 |
| Rating | 9.0/10 | 8.3/10 |
| Buy on Amazon | Buy on Amazon |
Pros & Cons
ComMarker B4 60W JPT MOPA Fiber Laser
Pros
- JPT M7 MOPA source confirmed — wider frequency range (1–4,000kHz) and tighter pulse consistency than Raycus Q-switched alternatives at any price; the datasheet comes in the box
- 60W output at up to 10,000mm/s makes batch tumbler marking and production jewelry engraving run at business-viable throughput — no other LightBurn-compatible MOPA under $1,100 offers this combination
- LightBurn compatible via COR file — both LightBurn and EZCad2 workflows supported; JPT M7's full pulse-width parameter range is accessible from LightBurn's galvo interface once configured
- Rust cleaning at 60W is a documented bonus capability — removes surface oxide from steel without abrasives, useful as pre-treatment before color marking on weathered material
- Foot pedal input, job preview function, and fan that only runs during active engraving — the small-business production workflow details that distinguish a tool from a toy
Cons
- LightBurn setup requires loading a COR file and manually configuring galvo axis, Q-Pulse Width, and frequency settings — LightBurn forum (April 2026) shows new owners needing 30+ minutes before getting first correct results; not auto-detected
- No autofocus — manual Z-axis focus required for every workpiece height change; the B6 MOPA, ComMarker's current flagship, corrects this limitation
- B4 MOPA line is end-of-life inventory — ComMarker now promotes the B6 MOPA (autofocus, updated form factor, same 60W power); ASIN B0CGX9TBGQ remains on Amazon but community resources will increasingly reference the B6 going forward
- Color marking requires calibration per material batch — powder coat thickness and alloy composition vary even within the same tumbler brand, requiring fresh test grids for each new batch
- No enclosure — Class 4 open-beam 1064nm infrared; requires OD6+ eyewear at 60W and either ComMarker's Safety Enclosure Pro or a dedicated controlled workspace
GWEIKE G2 Pro 30W Fiber Laser Engraver
Pros
- 15,000mm/s galvo speed — the fastest Q-switched fiber laser under $900 and 50% faster than the ComMarker B4 30W at $700; the throughput difference is measurable on production runs with any infill
- Wide 20–200kHz frequency range enables thermal oxidation color on stainless steel and titanium — GWEIKE documents '90+ colorful engravings' and DIY Life reviewer confirmed distinct greens and reds on stainless (Nov 2024)
- GWEIKE's LightBurn driver is the most actively maintained of any Chinese fiber laser brand — no COR file gymnastics, no galvo axis swap workarounds; direct native LightBurn galvo support out of box
- 150×150mm work area handles most knife blades, tumblers with rotary, and medium plaques without repositioning
- Active LightBurn settings ecosystem with documented community resources: a dedicated Etsy seller offers a 37-material LightBurn library specific to the G2 Pro 30W covering metals, plastics, and stone
Cons
- Color marking is thermal oxidation, not MOPA — results require experimentation per material and are less consistent and repeatable than a JPT MOPA machine; do not expect plug-and-play stainless color
- Focus height calibration is measured from lens center, not machine frame — GWEIKE's manual doesn't clarify this; every new owner mis-sets focus initially and must recalibrate by sound and burn quality (LightBurn forum, Feb 2026)
- Customer service is WhatsApp-only with inconsistent quality — best-lasercutter.com rates it 'a gamble'; not viable for production-critical environments with tight turnaround requirements
- Built-in fume extraction fan is insufficient for real engraving sessions — an external fume extractor ($80–$120) is a practical requirement, not an optional accessory
- Native G-Laser software is frustrating and feature-poor — nearly all users switch immediately to LightBurn; do not evaluate the machine on G-Laser
Our Verdicts
ComMarker B4 60W JPT MOPA Fiber Laser
The ComMarker B4 60W MOPA earns the top rating because no other machine under $1,100 combines 60W JPT MOPA, LightBurn support, and a work area that handles tumblers. It is the benchmark for serious makers and small business operators. Two things to verify before buying: first, check whether ASIN B0CGX9TBGQ is in stock — the B4 line is end-of-life, and if both the B4 and B6 MOPA are available at similar prices, the B6's autofocus makes it the stronger long-term buy. Second, budget time for LightBurn setup — the COR file configuration takes an hour the first time. For experienced users who know what they are buying into, this remains the benchmark purchase under $1,100.
GWEIKE G2 Pro 30W Fiber Laser Engraver
The GWEIKE G2 Pro is the fastest Q-switched fiber laser under $900 and the only machine in this price range that can produce visible thermal oxidation color on stainless steel without a MOPA source. The color is not MOPA-quality — it requires experimentation and is inconsistent batch-to-batch — but it exists, and nothing else at $799 can say the same. For deep engraving at maximum speed with color as a secondary capability, nothing competes. For consistent, repeatable color marking on tumblers or jewelry production, the OMTech 30W MOPA at $100 less is the more appropriate choice — it delivers true MOPA color repeatability that the G2 Pro's frequency tuning cannot match.