GSK GSK988TA, Manual

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GSK988TA/GSK988TA1/GSK988TB Turning Center CNC System User Manual 【 Programming & Operation 】
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Ⅰ
Programming
is switched off, and it continuously runs from current position after pressing the CYCLE
START key or the external cycle start signal is switched on;
◆
When Single Block is ON, the program pauses after every block is executed completely,
and then it continuously runs from the next block after the CYCLE START key is pressed
or the external cycle start signal is switched on;
◆
Block with “/” in the front of it is not executed when the block skipping switch is ON;
◆
The system skips to the target block to run after executing G65;
◆
Please see Section Three G Codes about execution sequence of G70~73;
◆
Call corresponding subprograms or macro program to run when executing M98; the
system returns to main program to call the next block when executing M99(if M99
specifies a target block number, the system returns to it to run) after the subprograms or
macro programs run completely;
◆ The system returns to the first block to run and the current program is executed
repetitively when M99 is executed in a main program.
1.6.2 Execution Sequence of Word
There are many words (G, X, Z, F, R, M, S, T and so on) and most of M, S, T are transmitted to
PLC by NC explaining and others are directly executed by NC. M98, M99, S word for specifying
spindle speed (r/min, m/min) is directly executed by NC.
The NC firstly executes G and then M codes when G codes and M00, M01, M02 and M30 are in
the same block.
The NC firstly executes G and then M codes( without transmitting M signal to PLC) when G
codes and M98, M99 are in the same block.
When G codes and M, S, T executed by PLC are in the same block, PLC defines M, S, T and G
to be executed simultaneously, or execute M, S ,T after G codes. Please see User Manual of machine
manufacturer for execution sequence of codes.
Execution sequence of G, M (except for the above M codes), S, T defined by GSK988TA/TB PLC in
the same block is determined by PLC, which is divided into two methods:
a) Movement codes and M miscellaneous code are executed simultaneously.
b) Execute miscellaneous codes after executing movement codes.
Refer to the machine manufacture’s user manual for the concrete execution method.
The second method is executed when there is M9, M99, M13, M33 or M5 for our GSK ladder.
Note: When G28 or G30 and M01 are in the same block, the pause after zero return is done. When there is a
single block stop code without M01, the single block stop is executed at the middle point and zero return
completion position.