TECNA te-90 Operation & User’s Manual

24 Vac +10% / -20% 50/60 Hz. Consumption: 7 VA at rest 21 VA when welding Operative temperature: 5 ÷ 40 °C according to the type of parameter. The minimum and maximum limits of each parameter are described in the following table. * When the pulse function is used, that is when the IMPULSE NUMBER is other than 0, the welding time should not exceed 25 periods. If this condition is not observed, an error is signaled. In this way all the parameters are set to the desired value. Please notice that it is not necessary to press any push-button to confirm the set value, as this is automatically stored up after the adjustment. W ...

regulation of all programming parameters. These parameters indicate the operating times and the current adjustments characterising the working cycles whenever performed consecutively. The following chart shows the order the programmed functions are carried out. DESCRIPTION OF THE WORKING CYCLE The symbols refer to the programming parameters described in the following paragraph. Due to safety reasons, the microprocessor does not start the welding cycle when the cycle start signal is enabled during the welder connection; in this case, disable the control and then enable it again. Any microinter ...

facilitate the welding process of oxidised sheets and rods. The pieces oxidation blocks the current flow during the first welding phase, thus limiting, in a different way depending from the welding process, the real time of current flow. The compensation function controls the welding current by means of a coil located inside the secondary circuit. Until the welding current does not exceed a pre- set limit, the welding time is automatically extended up to a limit of 99 cycles. In this way it is possible to carry out welding processes with an always constant real time of current flow. If, after ha ...