Telwin PTE 28 LCD Pedal Spot Welder

Quick guide from the manual

The Telwin PTE 28 LCD is a column spot welding machine designed for industrial and professional use. Before operating, ensure the machine is placed on a stable, horizontal surface and properly connected to the power supply and cooling system. The operator must be trained in resistance welding procedures and safety measures. Always use the main switch to lock the machine in the 'O' position when not in use or during maintenance.

Safety

Electrical Safety: The machine must be connected to a power supply with the neutral conductor connected to earth. Do not use cables with worn insulation. Crushing Risk: Keep hands away from moving parts. The machine does not have integrated protection against crushing; use appropriate preventive measures and keep hands away from electrodes. EMF Safety: Welding current generates electromagnetic fields. Keep heads and trunks away from the welding circuit. Do not weld near medical equipment like pacemakers.

Installation

Lifting: Use a double cable and hooks attached to the eyebolts provided. Do not lift by arms or electrodes. Positioning: Ensure the area is large, free of obstacles, and has adequate air exchange. Fasten the machine to the floor using four M10 bolts. Electrical Connection: Check rating plate data before connecting. Use differential switches (Type A for single-phase, Type B for three-phase). Pneumatic Connection (PCP models): Prepare a compressed air supply line with at least 6 bar pressure. Cooling Circuit: Connect the cooling water circuit (open or closed) ensuring a maximum water temperature of 30°C and the required flow rate.

Operation

Control Panel: Use the 'MODE' button to select between 'REDUCED' (Easy) and 'EXTENDED' (Expert) modes. The LCD display shows parameters like power percentage, approach time, ramp time, welding time, and pulse number. Welding Procedure: Ensure the machine is powered and the 'START' icon is visible. Select the mode, set parameters, position the sheet metal, and press the pedal to close the electrodes and initiate the welding cycle.

Maintenance

Routine Maintenance: Perform regular checks on electrode tip diameter and profile, electrode alignment, cooling system (check for leaks and water level), spring load, and compressed air filter condensation. Extraordinary Maintenance: Should be performed only by skilled technicians. Periodically clean the inside of the machine (transformer, modules) using dry compressed air (max 5 bar). Ensure all wiring is secure and insulation is intact.

Troubleshooting

If the machine does not run properly, check the following: Power: Ensure the display is ON; if not, check the power line, fuses, and voltage. Alarms: If an alarm is triggered, wait for the 'START' icon to light up and press the button to restart. Pneumatic (PCP): Check for low air pressure or if the cycle selector is in the wrong position. Mechanical: Ensure secondary circuit elements (arms, electrode holders) are tight and not rusted.