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CNC System Instruction
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 gravi-
ty, 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 posi-
tioning (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.
7. SETUP (Parameter Setting)
In the system main menu, press [F4] to enter parameter setting window as shown below:
7.1. Parameter Description
Speed parameters
Starting speeds of every axis, adjustment time and maximum speed limit.
System parameters
Gear ratio, mechanical origin , reference point, reverse backlash, line bias and soft positive/negative limit switch in every axis
Flame cutting parameters
Ignition delay, preheating delay, torch lifting/lowering delay, lifting/lowering of piercing torch, piercing delay, etc.
