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CNC System Instruction
Positioning delay of cutting torch
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When positioning the plasma torch, lower the torch until it hits the lower limit siwtch. Turn on the torch lifting
switch. After count the positioning delay of cutting torch, the lifting torch will stop(M75), in second.
M commands for arc ignition
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To set the output port of arc ignition, M12 by default
M commands for arc breaking
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To set the output port of arc breaking, M13 by default
Notes:
When the M command for arc breaking is next higher than the M command for arc ignition, it implies they share an output port, even number for
opening and even number for closing. In this case, the system uses level control to direct arc ignition switch. When the M command for arc breaking
and the M command for arc ignition are both even number but unequal to each other, it implies there are two output ports separately control the open-
ing and closing operations. In this case, the system uses pulse control with pulse width of 0.5 second.
Arc voltage test option
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It is used to determine if arc voltage is tested or not in plasma cutting operation. To enable arc voltage test, take 1 for the
option. User should test arc voltage feedback at arc ignition and monitor the feedback in operation. When arc voltage feedback is off, the system will
pause the operation and prompt. As a general rule, arc voltage test is enabled for thick plate machining. To disable arc voltage test, take 0 for the option.
After the arc ignition switch is turned on, the machining will start when the piercing delay is up. The system will not test arc voltage feedback in the
cutting process. Generally, arc voltage test is disabled for thin sheet machining.
Positioning test option
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In execution of M07 command, it is used to determine torch positioning operation or not. If the option is taken 1, torch
positioning operation will be enabled.
Piercing delay
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If arc ignition is successful, the system will start normal cutting operation after the piercing delay.
Height control disabling distance at corner
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At the transition or corner of two program segments, speed and arc voltage might change, causing
unexpected nozzle knock; therefore, the system will automatically disable the height control in such a distance from the endpoint of program segment,
in mm.
Arc voltage disabling distance near end point
-----
The machining path is usually a closed curve. At the end of machining, the origin point and the
end point will repeat, which often cause overburn and affect the smoothness. If this distance option is enabled, the system will automatically disable the
arc voltage and the height control in such a distance from the endpoint , in mm.
7.5. Control Parameters Setting
In the SETUP submenu, press [F5] key to enter control parameters setting window, as shown in Fig. 7.6
Flame/plasma option——
Take 0 for flame machining and 1 for plasma machining.
Move hole option——
0 stands for disabling the option and 1 for enabling the option.
No
-
pretreatment pattern——
The normal machining procedure is to machining program first to calculate the maximum value and the mini-
mum value of the pattern. However, it might take too long to handle a large program. Therefore, it is allowed to set the maximum value
and
the minimum value of pattern in advance without pattern pre
-
treatment( see the parameters below). The system will machine the work-
piece when drawing the pattern.
Fig. 7.6 Control parameters menu
