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5238-E P-44
SECTION 4 PREPARATORY FUNCTIONS
6.
Constant Speed Control (G96/G97)
[Function]
When the constant speed cutting function is selected, cutting at a constant cutting speed is possible.
This feature can reduce cutting time and also assure stable finish in end face cutting operations.
Constant Speed Cutting Command
[Programming format]
G96 S__
Canceling Constant Speed Cutting
[Programming format]
G97 S__
[Program Example]
LE33013R0300600080001
[Supplement]
S
: Set the cutting speed (setting unit: m/min)
S
: Set the spindle speed to be used after canceling the constant speed cutting mode.
1) If the spindle speed exceeds the maximum or minimum speed allowed within the range
selected by an M code while in the constant speed cutting mode, it is fixed at the allowed
maximum or minimum speed automatically; the LIMIT indication light on the operation panel
goes on.
2) If the X-axis is moved a large distance at the rapid traverse rate while in the constant speed
cutting mode, for example from the turret indexing position toward the workpiece or vice versa,
there will be sudden changes in the rotational speed which, depending on the chucking method,
could be dangerous.
Therefore, the constant speed cutting mode must be cancelled before commanding positioning
of the cutting tool near the workpiece, return of the tool to the turret indexing position, or any
other operation that causes large X-axis travel.
3) A block containing G96 or G97 must contain an S word.
4) Thread cutting programs cannot be executed in the G96 constant speed cutting mode.
5) To activate the constant speed cutting mode on turret B, specify G111 with G96. To restore
the constant speed cutting mode to turret A, specify G110.
6) To execute the commands over two blocks continuously with control in the constant speed
cutting mode without waiting for the spindle speed arrived signal, specify M61. To cancel this,
specify M60.
N
ΟΟΟ
G96 S100
⋅⋅⋅⋅⋅⋅⋅
All cutting following this block is executed at a cutting speed of 100 m/min.
N
ΟΟΟ
G97 S500
⋅⋅⋅⋅⋅⋅⋅
After this block, cutting is carried out at a spindle speed of 500 min
-1
.