GSK 988T, Руководство пользователя

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GSK988T Turning CNC System User Manual
90
Ⅰ
Programming
Note 3. In MDI and DNC mode, G70 ， G71 ， G72 or G73 can not be specified, otherwise, the system alarms.
But in MDI and DNC mode, G74 ， G75 or G76 can be specified.
Note 4: The block quantity of G70, G71, G72 or G73 in the sequence numbers specified by P and Q cannot
exceed 100.
Note 5: The blocks in the serial numbers specified by P and Q in G71
，
G72 or G73 cannot specify the
following command:
（ 1 ） non-modal G command except for G04 in group 00;
（
2
）
all G commands except for G00, G01, G02, G03 in group 01;
（
3
）
G20 and G21;
（
4
）
M98 and M99;
Note 6: The skip function should not be executed in the blocks of their serial number specified by P and Q.
when the skip function is used in the blocks of their serial numbers specified by P and Q.
Note 7: The tool nose radius compensation is invalid.
Note 8: No.5104 Bit2 (FCK
）
sets whether G71, G72, G73 executes the outer check. When it is set to1, the
check is executed. The system alarms when the positioning point is in the cutting range.
Note 9: No.5102 Bit1 （ MRC ） set whether the system alarm when the finishing cycle in G71 ， G72 is in
non-monotonous, and it alarms when Bit1 is set to 1.
2.16 Threading Cutting
GSK988T CNC system can machine many kinds of thread cutting, including metric/inch
single, multi threads, thread with variable lead and tapping cycle. Length and angle of thread
run-out can be changed, multiple cycle thread is machined by single sided to protect tool and
improve smooth finish of its surface. Thread cutting includes: continuous thread cutting G32,
thread cutting with variable lead G34, Z thread cutting G33, Thread cutting cycle G92, Multiple
thread cutting cycle G76
The machine used to thread cutting must be installed with spindle encoder, the transmission
ratio between spindle and encoder is set by the parameter. X or Z traverses to start machine
after the system receives spindle signal per rev in thread cutting, and so one thread is machined
by multiple roughing, finishing without changing spindle speed.
GSK988T CNC system can machine many kinds of thread cutting, such as thread cutting
without tool retraction groove. There is a big error in the thread pitch because there are the
acceleration and the deceleration at the starting and ending of X and Z thread cutting, and so
there is length of thread lead-in and distance of tool retraction at the actual starting and ending of
thread cutting.
X, Z traverse speeds are defined by spindle speed instead of cutting feedrate override in
thread cutting when the pitch is defined. The spindle override control is valid in thread cutting.
When the spindle speed is changed, there is error in pitch caused by X and Z
acceleration/deceleration, and so the spindle speed cannot be changed and the spindle cannot be
stopped in thread cutting, which will cause tool and workpiece to be damaged.
Note: When the modal function is used, M30 (M30 modal in MDI mode cannot be cancelled) in Auto mode
or G codes in Group 01 can cancel the mode state.
2.16.1 Thread Cutting with Constant Lead G32
Command function: Executing G32 can machine the metric or inch straight, taper, end face
thread and continuous multi-section thread:
Command format
：
G32 X(U)_ Z(W)_ F(I)_ J_ K_ Q_