hi
one for the electronics guys sorry for the crude drawing. attached is the circuit diagram from my loke mig 160 and its for the wire feed drive. its a 3 phase machine but the drive runs from an ac supply tapped off one of the main transformer coils.
i understand its a variation of the basic phase splitter used in dimmer switches its just the fact that dc is tapped off it and ive not seen this before. the diagram is the circuit in welding mode ie the relay has pulled up to connect 1 to 2 ( when the tourch is released it connects 1 to 3)
what id like to know is
1 what is the purpose of capacitor c1 that runs through 2 seperate resistors
2 why does the relay short out the drive motor terminals when in the non welding mode ie trigger released is this to stop over run of the wire feed?
3 am i right in thinking the motor is recieving chopped half wave rectified dc.
the reason by the way for working out the circuit is that it blew the circuit board track on the centre terminal of the triac and im trying to find out why. the drive motor is all ok
one for the electronics guys sorry for the crude drawing. attached is the circuit diagram from my loke mig 160 and its for the wire feed drive. its a 3 phase machine but the drive runs from an ac supply tapped off one of the main transformer coils.
i understand its a variation of the basic phase splitter used in dimmer switches its just the fact that dc is tapped off it and ive not seen this before. the diagram is the circuit in welding mode ie the relay has pulled up to connect 1 to 2 ( when the tourch is released it connects 1 to 3)
what id like to know is
1 what is the purpose of capacitor c1 that runs through 2 seperate resistors
2 why does the relay short out the drive motor terminals when in the non welding mode ie trigger released is this to stop over run of the wire feed?
3 am i right in thinking the motor is recieving chopped half wave rectified dc.
the reason by the way for working out the circuit is that it blew the circuit board track on the centre terminal of the triac and im trying to find out why. the drive motor is all ok