SZGH SZGH-CNC1000MDb Series, Руководство пользователя

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-Shenzhen Guanhong Automation Co.,Ltd.- SZGH-CNC1000MDb Series
- 83 -
3.28.11 Back Boring Cycle (G87)
This cycle performs accurate boring.When the bottom of the hole has been reached, the spindle
stops, and the tool is moved always from the machined surface of the workpiece and retracted with
the direction that set by P4 in User parameter.
Format: G87 X_ Y_ Z_ R_ Q_ P_ F_ L_ ;
X_ Y_: Hole position data
Z_ : The distance from point R to the bottom of the hole
R_ : The distance from the initial level to point R(the bottom of the hole) level
Q_ : Tool shift amount
P_ : Dwell time
F_ : Cutting feedrate
L_ : Number of repeats
G86
Warning: Q(shift at the bottom of a hole) is a modal value retained within canned cycles. It must be
specified carefully because it is also used as the depth of cut for G73 and G83
.
After positioning along the X and Y axis,the spindle is stopped at the fixed rotation position
(Spindle orientation). The tool is moved in the direction(this direction is set by P4 & P5 in User
parameter), opposite to the tool tip, positioning (rapid traverse) is performed to the bottom of the
hole (point R). Then the tool is shifted in the direction of the tool tip and the spindle is rotated
clockwise. Boring is performed in the positive direction along the Z-axis until point Z is reached. At
point Z, the spindle is stopped at the fixed rotation position again(Spindle orientation), the tool is
shifted in the direction opposite to the tool tip, then the tool is returned to the initial level. Then the
tool is shifted in the direction of the tool tip and the spindle is rotated clockwise to proceed to the
next block operation.
Before specifying G87, use miscellaneous function (M code) to rotate the spindle. When the
G87 command and an M code are specified in the same block, the M code is executed at the time of
the first positioning operation. The system then proceeds to the next boring operation.
When a tool length offset (G43, G44 or G49) is specified in the canned cycle, the offset is
applied at the time of position to point R.