I had a loose connection in this soldering gun which i found and fixed, all working ok now.
I didnt understand the wiring fully - the trigger connects the live to two witea (yellow and red in photo), does anyone know why there are two?
I would have thought there’s only one with the other end of the coil attached to neutral. Using a multimeter, the yellow and red seem to be joined (buzzer confirmed continuous) which confuses me more. Also reaistance from yellow/red to neutral end of coil is similar at 50ohms.
I was also curious about the current in the secondary coil (the solder head), but couldn’t measure since my clamp meter only goes up to 100a.
So i thought i could calculate:
Current on primary is 0.67a at 250v gives 168w
voltage on secondary is 0.35v. Assuming 100% efficiency, that gives 480amps?!! (168/0.3), even with lower efficiency we’re still at hundreds of amps, can that be right???!
I didnt understand the wiring fully - the trigger connects the live to two witea (yellow and red in photo), does anyone know why there are two?
I would have thought there’s only one with the other end of the coil attached to neutral. Using a multimeter, the yellow and red seem to be joined (buzzer confirmed continuous) which confuses me more. Also reaistance from yellow/red to neutral end of coil is similar at 50ohms.
I was also curious about the current in the secondary coil (the solder head), but couldn’t measure since my clamp meter only goes up to 100a.
So i thought i could calculate:
Current on primary is 0.67a at 250v gives 168w
voltage on secondary is 0.35v. Assuming 100% efficiency, that gives 480amps?!! (168/0.3), even with lower efficiency we’re still at hundreds of amps, can that be right???!