Have a Clarke weld en 110 bought second hand will only weld on high setting could anyone help or advise where the problem is concerning the lower switch settings or could it be the windings I have not touched anything as yet hope you can help
it will be the same for all of the switchesCheck the continuity through the High low switch, the do burn out.
Now thats what i call serviceWelcome. The starting point is to measure the open circuit voltage (OCV) with a multi meter, between the torch tip and the work return clamp.
These old, blue models all have a range of around 18 vdc to 30 vdc, over the (four or six) voltage settings.
If the measured voltages are all uniformly low, that points to a rectifier problem. Remove the side panel, locate the rectifier (two or three aluminium plates) and look for diodes with blown / disconnected wires.
If nothing is visibly wrong, use the diode test function on the meter to check each one reads 0.5 to 0.6 in one direction and nothing / OL, in the other direction.
If the measured voltages are at or close to the above range, then high resistance, due to age and oxidation, can be the cause of the lower power:
Clean and tighten all the bolted joints.
Inspect under the 'braided shroud' from the transformer to work return lead for corrosion.
Remove the spade terminals from the (two or three) toggle switches and clean them up.
Post up some photos if you're unsure.
Welcome. The starting point is to measure the open circuit voltage (OCV) with a multi meter, between the torch tip and the work return clamp.
These old, blue models all have a range of around 18 vdc to 30 vdc, over the (four or six) voltage settings.
If the measured voltages are all uniformly low, that points to a rectifier problem. Remove the side panel, locate the rectifier (two or three aluminium plates) and look for diodes with blown / disconnected wires.
If nothing is visibly wrong, use the diode test function on the meter to check each one reads 0.5 to 0.6 in one direction and nothing / OL, in the other direction.
If the measured voltages are at or close to the above range, then high resistance, due to age and oxidation, can be the cause of the lower power:
Clean and tighten all the bolted joints.
Inspect under the 'braided shroud' from the transformer to work return lead for corrosion.
Remove the spade terminals from the (two or three) toggle switches and clean them up.
Post up some photos if you're unsure