ARCBRO Stinger Series - M Auxiliary Commands: Torch Control and Safety; Torch Lowering, Positioning Delay, and Master Switch

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M71: Fixed loop of lowering torch
This command is used before piercing operation, opposite to M70 in function and little bit
smaller in value. Because of gravity, the lowering action is faster than lifting action. Operation
sequence: turn on the torch lowering switch(M16), count the time delay of lowering torch(refer
to 7.3 for flame parameter) and turn off the torch lowering switch(M17).
M72: Loop of lifting the piercing torch
At the end of preheating, this command is used to lift the cutting torch somewhat to prevent
the torch nozzle from blocked by splashing slag. The operation sequence is as follows: turn
on the torch lifting switch(M14); count the time delay of lifting the piercing torch(refer to 7.3 for
flame parameter); turn off the torch lifting switch(M15).
M73: Loop of lowering the piercing torch
At the end of preheating after M72 is executed and the cutting oxygen valve is opened, this
command is used to move the torch to the cutting position, opposite to M72 in function and
little bit smaller in value. Because of gravity, the lowering action is faster than lifting action.
Operation sequence: turn on the torch lowering switch(M16), count the time delay of lowering
the piercing torch(refer to 7.3 for flame parameter) and turn off the torch lowering switch(M17).
M75: Time delay of torch positioning
When positioning the plasma gun, lower the torch(M16). It will not stop until the torch hits
the lower limit switch (refer to input port 8 XXW)(M17). Turn on the torch lifting switch (M14). After
count the time delay of torch positioning (refer to 7.4 for plasma parameter), the lifting torch will
stop(M15).
M80: Master switch
All the output ports will be turned off if the command of M80 is executed.