Below is a consolidated reference table covering all current MA1 Series handheld laser welder models (MA1‑35, MA1‑45, MA1‑65, and MA1 ULTRA). These details will aid a Laser Safety Officer (LSO) or safety consultant in designing a safe Class 4 laser work environment: selecting appropriate eyewear, defining barriers/enclosures, managing ventilation, and implementing access control procedures. All data are taken from THEO’s Technical Data MA1 Series (version 1.2).
MA1 Series Laser Parameters and EU Safety References #
Laser welding source #
| Parameter | MA1‑35 | MA1‑45 | MA1‑65 | MA1 ULTRA | Key EU / Safety Notes |
|---|---|---|---|---|---|
| Classification | Class 4 near‑IR fiber laser Conforms to IEC 60825‑1 / EN 60825‑1 |
Class 4 lasers demand a laser‑controlled area with door/curtain interlocks, warning signs (ISO 7010), and strict PPE. Comply with EN 60825‑4 for enclosures/guards. | |||
| Wavelength | 1080 ± 10 nm | ||||
| Output power | Up to 800W | Up to 1200W | Up to 1500W | Up to 2000W | All can be adjusted from ~10–100 % of nominal. Even at lower settings, Class 4 hazard remains. |
| Input power | 3000 W | 4800 W | 6000 W | 6000 W | |
| Weld penetration, stainless steel | Up to ~3.5 mm | Up to ~4.5 mm | Up to ~6.5 mm | Up to ~8.5 mm | Actual penetration depends on travel speed, shielding gas, and material properties. |
| Weld penetration, steel | Up to ~3.5 mm | Up to ~4.5 mm | Up to ~6.5 mm | Up to ~8.5 mm | Actual penetration depends on travel speed, shielding gas, and material properties. |
| Weld penetration, aluminum | Up to ~3.0 mm | Up to ~4.0 mm | Up to ~5.5 mm | Up to ~6.5 mm | Actual penetration depends on travel speed, shielding gas, and material properties. |
General characteristics #
| Parameter | MA1‑35 | MA1‑45 | MA1‑65 | MA1 ULTRA | Key EU / Safety Notes |
|---|---|---|---|---|---|
| Power supply | Single‑phase 200–240 V AC (~26 A recommended) |
Must fulfill CE requirements under Low Voltage Directive (2014/35/EU) and local electrical standards. Proper grounding is mandatory. | |||
| Operating ambient temperature | 0–40 °C | ||||
| Relative humidity | 10–85 % | ||||
| Storage temperature | −10–60 °C | ||||
| Weight | 29 ± 3 kg (64 lb) | 38 ± 3 kg (84 lb) | 39 ± 3 kg (86 lb) | 42 ± 3 kg (93 lb) | |
| Dimensions (L × H × W) | 577 × 512 × 265 mm | 667 × 542 × 276 mm | 667 × 542 × 276 mm | 667 × 542 × 276 mm | |
| Airborne noise level | Max. 85 dB(A) Fans adjust automatically to the working condition. |
For installations within the EU, comply with EN ISO 11553‑3. | |||
| Cooling, laser source | Air‑cooled (internal fans) | Ensure vents are unobstructed. Ambient operating temperature and humidity must stay within specified limits. | |||
| Cooling, welding head | Gas cooling of the fiber connector and optics | ||||
Optical parameters #
| Parameter | MA1‑35 | MA1‑45 | MA1‑65 | MA1 ULTRA | Key EU / Safety Notes |
|---|---|---|---|---|---|
| Operating mode | Continuous‑Wave (CW) fiber laser May be rapidly gated on/off for tack or “fish‑scale” welds |
No Q‑switched or short‑pulse output. Laser is fundamentally CW, which is fully Class 4 at any power setting. | |||
| Polarization | Random | ||||
| Output at 100 % CW | 750–800W | 1150–1200W | 1450–1500W | 1900–2000W | Ambient temperature 26 °C |
| Electro‑optical efficiency | 27 % | 35 % | The MA1 ULTRA uses a different diode technology. | ||
| Power control range | 10–100 % | 1 %; ambient temperature 26 °C | |||
| Raw beam diameter | 4.47 mm | ||||
| Beam diameter at focus point | 60 µm | ||||
| Divergence angle | 29.8 mrad | ||||
| Rayleigh length | 2.0 mm | ||||
| Duty cycle | 75 % | 75 % | 75 % | 100 % | 75 % ≈ 120 s on / 40 s off |
| Wobble width range | 0–4 mm | 0–6 mm* | *Available from H2/2026 | ||
| Maximum modulation frequency | 10 kHz | ||||
| Laser switch‑off delay (programmable) | 0–100 ms | ||||
| Short‑term power stability | 2 % | 100 % CW, > 1 h | |||
| Collimating lens (QCS) | 50 mm | Focal length of the collimating lens | |||
| Focus lens | 150 mm | Focal length of the focusing lens | |||
| Beam quality M² | 1.3 (typ.) | 100 % CW | |||
| Laser activation time (on) | 50–100 µs | 10–90 % power | |||
| Laser switch‑off time | 50–100 µs | 90–10 % output | |||
| Fiber break detection | 100 µs | ||||
| Displayed power of the red pilot beam | 300–1000 µW | 100 % CW | |||
| NOHD | 127 m | 156 m | 174 m | 201 m | Eye hazard calculation |
| MPE, eye (MZB) | 70.7 W/m² | Based on DIN EN 60825‑1 | |||
| NHZ | 24 m | 29 m | 33 m | 38 m | Skin hazard calculation |
| MPE, skin | 2000 W/m² | Based on DIN EN 60825‑1 | |||
| Fiber diameter | 20 µm | ||||
| Length of the hose pack with optical fiber | 4.35 m | 5.6 m | 5.6 m | 5.6 m | |
| Bending radius of the fiber hose pack | 200 mm | ||||
| Laser output connector | QCS, integrated fiber | ||||
Shielding gas, protective equipment and workplace #
| Parameter | MA1 Series (all models) | Key EU / Safety Notes |
|---|---|---|
| Shielding gas | Argon (Ar) @ 99.996 % purity Nitrogen (N₂) @ 99.999 % purity ~10–16 l/min (~21–34 cfh) |
Argon or nitrogen helps reduce oxidation and spatter. Gas supply and pressure must adhere to local gas safety standards. |
| Laser eye protection | >1070–1075 nm → OD6+, D LB6 + IR LB8 + M LB9 >1075–1080 nm → OD6+, D LB6 + IRM LB8 >1080–1087 nm → OD6+, D LB6 + IRM LB7 |
Check label for wavelength and OD. Use a visor or helmet with IR filter. PPE must meet EU Regulation 2016/425 and/or ANSI Z136.7 outside the EU. In the EU, use EN 207 glasses for full protection or EN 208 for alignment. |
| Barrier / interlock | Use laser‑rated enclosures or curtains. Interlock doors recommended (EN 60825‑4). | Class 4 lasers require strict access control. Automatic shutdown upon unplanned entry is standard best practice. |
| Other PPE & clothing | – Laser goggles + welding helmet (IR filter) – Flame‑resistant outerwear/gloves (CE‑approved, e.g. EN ISO 11611 or EN ISO 11612) |
Protects from direct/diffuse beam, welding arc glare, sparks, and hot spatter. |
| Ventilation | Local exhaust or filtration recommended (e.g., EN ISO 15012) to manage fumes and airborne particles | Laser welding can produce particulates, especially on coated or galvanized metals. Proper ventilation is essential for safety and legal compliance. |
T1 wire feeder #
| Parameter | T1 wire feeder |
|---|---|
| Power supply | 24 V DC |
| Ambient conditions | No vibration, no bounce |
| Operating ambient temperature | 5–50 °C |
| Ambient humidity | < 90 % RH |
| Storage temperature | −15–85 °C |
| Dimensions (L × H × W) | 580 × 360 × 245 mm |
| Weight | 13 ± 3 kg (29 lb) |
| Maximum wire coil weight | 25 kg (55 lb) |
For more in-depth specifications, recommended welding settings, and operational guidelines, see the THEO MA1 Operator Manual or contact THEO technical support.
Certifications and Standards #
| Certification | MA1 Series | Harmonized standards / basis |
|---|---|---|
| EC Declaration of Conformity (CE) | In accordance with: Machinery Directive 2006/42/EC Low Voltage Directive 2014/35/EU EMC Directive 2014/30/EU |
ISO 12100:2010 ISO 11553‑2:2008 EN 60204‑1:2018 EN 60825‑1:2014+A11:2021 EN IEC 61000‑6‑4:2019 EN IEC 61000‑6‑2:2019 |
| Performance level calculation | PL d (third‑party certified, SGS) | ISO 13849‑1:2015 |
| Verification of EMC compliance | EN IEC 61000‑6‑2:2019 EN IEC 61000‑6‑4:2019 |
|
| IP protection class | IP 54 | |
| FCC Supplier’s Declaration of Conformity | 47 CFR Part 15 | U.S. electromagnetic compatibility |
| FDA verification of compliance | 21 CFR Part 1040.10 | U.S. laser safety requirements |
| Machinery Directive verification of compliance | EN ISO 11553‑2:2008 EN ISO 12100:2010 EN 60204‑1:2018 EN 60825‑1:2014+A11:2021 |
|
| ETL | Electrical safety, compatible with UL and CSA standards |
Comprehensive Safety Measures #
- LOOP Safety Interlock: Touch-sensitive torch and workpiece clamp prevent accidental laser activation.
- Additional Dual-Channel Interlock: Enhances security during operation. Allows an external E-stop via the DB25 socket.
- Welding Torch Trigger: Ensures the laser fires only when deliberately engaged.
- Gas Pressure Detection: Automatically links to the control switch and activates a security alarm if pressures fall outside safe levels.
- Fiber Breakage Detection: Continuously monitors fiber integrity to avert unsafe operation.
- Overtemperature Protection: Automatically shuts down the laser if it detects excessive heat.
- Visual and Audible Alerts: Warn operators of operational issues in real time.
- Safety Key Switch: Restricts use to authorized personnel only.
- Emergency Controls: Onboard E-stop button and power switch for immediate system shutdown.
Legal Disclaimer #
All statements, specifications, and technical information in this document are provided for general reference only. Technical specifications are subject to change without notice. The official product documentation that ships with each MA1 Series machine is the sole authoritative source for all technical details, safety guidelines, and usage instructions. THEO assumes no liability for any errors or omissions herein and reserves the right to modify its products at any time.
