THEO MA1 Series | Operating Parameters

YOUR SUCCESS, OUR COMMITMENT. LET’S CONNECT.

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 sourced from the HHW THEO MA1 Series User Manual and supporting product information.

MA1 Series Laser Parameters and EU Safety References #

ParameterMA1 Series (All Models)Key EU / Safety Notes
ClassificationClass 4 near‑IR fiber laser
1080 ± 10 nm 

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.
Output Power– MA1‑35: ~800 W 
– MA1‑45: ~1200 W 
– MA1‑65: ~1500 W 
– MA1 ULTRA: up to ~2100 W
All can be adjusted from ~10–100% of nominal. Even at lower settings, Class 4 hazard remains.
Raw Beam Diameter5,495 mm
Beam Diameter At Focus Point0.0223 mm
Divergence Angle21,8 mrad
Weld Penetration (Steel)– MA1‑35: up to ~3.5 mm 
– MA1‑45: up to ~4.5 mm 
– MA1‑65: up to ~6.5 mm 
– ULTRA: up to ~8.5 mm
Actual penetration depends on travel speed, shielding gas, and material properties.
Operating ModeContinuous‑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.
Power SupplySingle‑phase 200–240 V AC 
(~25 A recommended)
Must fulfill CE requirements under Low Voltage Directive (2014/35/EU) and local electrical standards. Proper grounding is mandatory.
Cooling MethodAir‑cooled (internal fans)Ensure vents are unobstructed. Ambient operating temperature and humidity must stay within specified limits.
Shielding GasArgon (Ar) @ 99,996% purity
Nitrogen (N₂) @ 99,999% purity
 
~15–20 L/min
~25 – 40 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 → OD9+, D LB6 + IR LB8 + M LB9 
>1075 – 1080 nm → OD8+, D LB6 + IRM LB8 
>1080 – 1087 nm → OD7+, D LB6 + IRM LB7 
Check label for wavelength & OD. Include a welding visor or helmet with IR filtration.

PPE must comply with PPE Regulation (EU) 2016/425 and/or ANSI Z136.7 outside EU.

EU, laser safety glasses must comply with EN 207 for full protection or EN 208 for laser adjustment tasks
Barrier / InterlocksUse 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 11611 or EN 11612)
Protects from direct/diffuse beam, welding arc glare, sparks, and hot spatter.
VentilationLocal exhaust or filtration recommended (e.g., EN ISO 15012) to manage fumes and airborne particlesLaser welding often generates particulates, especially on coated or galvanized metals. Adequate ventilation is crucial for operator health and compliance with local worker‑safety laws.

For more in-depth specifications, recommended welding settings, and operational guidelines, see the HHW THEO MA1 Series User Manual or contact THEO technical support.

Certifications and Standards #

  • FCC (U.S. electromagnetic compatibility)
  • FDA / 21 CFR 1040.10 (U.S. laser safety requirements)
  • CE (EU directives on Machinery, Low Voltage, and EMC)
  • PL‑d according to ISO 13849‑1 (functional safety for control systems)
  • EN 60204‑1 (electrical safety of machinery)
  • EN 60825‑1 (laser classification and safety)
  • ISO 11553‑2 (laser processing machine safety)
  • ISO 12100 (machinery risk assessment and risk reduction)
  • EN IEC 61000‑6‑2 & EN IEC 61000‑6‑4 (electromagnetic compatibility)
  • 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.

What are your feelings