1. Machine Type and Suitability Check
• ☐ Is it a stationary spot welding machine, portable (suspended), or robot-integrated system?
• ☐ Types of materials to be welded (low carbon steel, stainless steel, galvanized sheet metal, aluminum, etc.)
• ☐ Sheet thickness range (min–max, single/double sheet combinations)
• ☐ Number of weld points per day / per shift (is the capacity sufficient?)
• ☐ Requirement for manual, semi-automatic, or fully automatic operation
2. Electrical System and Power Unit
• ☐ Transformer type: AC / DC / MFDC (Medium Frequency DC)
• ☐ Maximum short-circuit current (kA)
• ☐ Duty cycle (operating time / cooling time)
• ☐ Power grid compatibility (380–400V / 50 Hz – Turkey standard)
• ☐ Energy efficiency (is MFDC preferred?)
• ☐ Tolerance to phase imbalance and voltage fluctuations
3. Mechanical Structure and Frame
• ☐ Frame rigidity (does the structure flex during welding?)
• ☐ C-arm / X-arm / custom arm options
• ☐ Arm length and reach distance
• ☐ Electrode pressure force (daN / kN)
• ☐ Pneumatic or servo-controlled pressure system
• ☐ Vibration and repeatability tolerances
4. Control Unit and Software
• ☐ Is there a digital welding control unit?
• ☐ Can current, time, and pressure be adjusted separately?
• ☐ Recipe (program) storage capacity
• ☐ Quick program switching for different products
• ☐ Current feedback system
• ☐ Weld error detection (current drop, electrode wear, etc.)
5. Electrodes and Consumables
• ☐ Electrode material (CuCrZr, CuCoBe, etc.)
• ☐ Electrode tip shape (conical, flat, special forms)
• ☐ Ease of electrode replacement
• ☐ Electrode lifespan and dressing requirements
• ☐ Availability of consumables (local / imported)
6. Cooling System
• ☐ Is a water-cooled system available?
• ☐ Are the transformer, electrodes, and cables cooled separately?
• ☐ Are flow and pressure sensors installed?
• ☐ Filtration system against scale and mineral buildup
• ☐ Water leakage sensor or alarm system
7. Welding Quality and Testing
• ☐ Has a sample welding test been performed?
• ☐ Peel / chisel test results
• ☐ Weld nugget diameter and penetration suitability
• ☐ Any burning or spatter formation?
• ☐ Surface quality when welding galvanized sheets
8. Safety and Standards
• ☐ CE compliance
• ☐ Emergency stop button
• ☐ Operator protection against finger/arm pinch hazards
• ☐ Electrical insulation and grounding
• ☐ IP protection class
• ☐ Noise level
9. Maintenance and Service
• ☐ Are periodic maintenance intervals clearly defined?
• ☐ Spare parts supply time
• ☐ Is there a service network within Turkey?
• ☐ Remote support / fault diagnosis capability
• ☐ User and maintenance documentation (Turkish)
10. Total Cost of Ownership (TCO)
• ☐ Initial investment cost
• ☐ Energy consumption
• ☐ Electrode and consumable costs
• ☐ Maintenance and downtime costs
• ☐ Impact on production speed and scrap rate
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