TOMATECH AUTOMATION
cutting feed amount per rev is specified by G99 FXXXX , the even cutting texture on the
surface of workpiece will be gotten. In G99 state, a spindle encoder should be fixed
on the machine tool to machine the workpiece.
G98, G99 are the modal G commands in the same group and only one is valid. G98 is the
initial state G command and the system defaults G98 is valid when the system turns on.
Reduction formula of feed between per rev and per min:
Fm = Fr×S
Fm: feed per min (mm/min) ;
Fr: feed per rev (mm/r) ;
S: spindle speed (r/min) .
After the system turns on, the feedrate is ones set by №030 and F value is reserved after
F is executed. The feed rate is 0 after F0 is executed. F value is reserved when the
system resets and emergently stops. The feedrate override is reserved when the system
is turned off.
Note: In G99 modal, there is the uneven cutting feed rate when the spindle speed is lower than 1
r/min; there is the follow error in the actual cutting feed rate when there is the swing in the spindle
speed. To gain the high machining quality, it is recommended that the selected spindle speed
should be not lower than min. speed of spindle servo or converter.
Relative Parameter:
No.027: cutting speed upper limit value P
No.029: cutting feed and manual feed index Acc&Dec time
No.030: cutting feed start and end speed
3.25 Macro Commands
TAC-100XT provides the macro command which is similar to the high language, and can
realize the variable assignment, and subtract operation, logic decision and conditional
jump by user macro command, contributed to compiling part program for special
workpiece, reduce the fussy counting and simplify the user program.
gramming
3.25.1 MACRO variables
� Presentation of macro variables
Present with “#”＋ macro variables number.;
Format: # i(i=100,102,103,……) ;
Example: #105, #109, #125.
� Variable Type
The variable is divided into four types according to the variable number:
Number NO. Variable type Function
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