Mitsubishi Electric MELDAS 600M Series Instruction Manual page 383

6.21 Manual synchronous tapping
(1) Outline
After a synchronous tap cycle is stopped with block stop or feed hold stop, this function carries out
tapping by selecting and moving the drilling axis with manual handle operation.
(2) Command format
This function is commanded with the same format as for synchronous tapping.
(3) Operation procedures
The procedures for manual synchronous tapping are described below.
(a) When using the multiple spindle specifications, select the command spindle.
(b) Stop the spindle and servo axis, and select the automatic operation mode.
(c) Execute the synchronous tapping cycle program.
(d) Apply block stop or feed hold stop.
(e) Change to the handle mode. Select and move the drilling axis.
(f) To cancel manual synchronous tapping, execute G80 in the same manner as the normal
(4) Precautions
(a) When selecting the axis for the handle mode, select the same axis as that commanded in the
(b) After executing the program with automatic operation, do not reset the program until manual
(c) During manual synchronous tapping, the acceleration/deceleration time constant is the same
(d) When using the multiple spindle specifications, changes to the commanded spindle selection
(e) The spindle rotation speed during manual synchronous tapping is not clamped by the
(f) Manual synchronous tapping is valid from the point that synchronous tapping and cutting is
(Note) To validate manual synchronous tapping without carrying out cutting, run the following type
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CHAPTER 2 MACHINE OPERATIONS
6. Operation Switch Functions and Other Functions
synchronous tap mode, or reset the program.
program.
synchronous tapping is completed.
The manual synchronous tapping mode will be canceled even if reset is applied in the handle
mode.
as normal handle operation. The return override is also invalid.
will be validated after G80; is executed or reset is input to cancel synchronous tapping, and
then manual synchronous tapping is started.
program's S command or spindle specification parameters Stap1 to 4 (tap rotation speed).
carried out once during automatic operation, and block stop is applied.
<Machining program>
N1 G84 Xx Yy Zz Rr Ff Ss ;
N2 Xx Yy ;
N3 G80 M02 ;
of program with no movement commands.
G91 G84 X0 Y0 Z0 R0 F2. S1000 ;
search engine
N1 block
N2 block
Initial point
R point
Z point
Manual synchronous tapping is valid in the shaded area.
II – 50
G80 cancel