GSK GSK988TA, Руководство пользователя

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Chapter 2 G Commands
97
Ⅰ
Programming
②
X executes the radial tool retraction e rapidly, and its tool retraction direction is opposite to the
feed direction of Step ;
①
③
When X executes feed cutting ( ∆ i+e) again, and the feed end point is still between the radial
cutting cycle starting point An and the axial tool infeed end point Bn. It executes the cutting
feed (
∆ i+e) again, and executes the Step ; after X executes the cutting feed ( ∆ i+e)
② ，
its feed
end point reaches Bn or is not between An and Bn
，
X executes the cutting feed to Bn
，
and
execute the Step ;
④
④
Z executes the axial tool retract
△
ion d
（
radius value
）
rapidly to Cn. When Z coordinate of
cutting end point Bf is less than that of the start point A, Z positively executes tool retraction,
otherwise, Z executes negatively tool retraction;
⑤
X executes the radial tool retraction to Dn rapidly, and the n times cutting cycle ends. When the
current is not the last radial cutting cycle, the system executes the Step ; when the current is
⑥
the last radial cutting cycle, the system executes the Step ;
⑦
⑥
Z executes the axial tool infeed rapidly, and its infeed direction is opposite to the Step . After
④
Z
△ △
executes the tool infeed d+ k)
（
radius value
），
the tool infeed end point is still between A
and Af (it is the start point of the last radial cutting cycle), Z executes the rapid tool infeed
△ △
( d+ k) ， i.e., ： Dn → An+1 ， then executes the Step ① （ start the next radial cutting cycle ） ;
after Z
△ △
executes ( d+ k)
，
the tool infeed end point reaches Af or is not between Dn and Af
，
Z performs the rapid traverse to Af ， then, executes the Step ① ， and starts the last radial cutting
cycle
；
⑦
X rapidly returns to the start point A, and G75 execution processing ends.
。
Example
：
Fig. 2-53
Fig. 2-53 G75 cutting path
Program:
O0008
；
G00 X150 Z50 M3 S500
； （
Start spindle with 500 rev/min
）
G0 X125 Z-20
； （
Position to start point of machining
）
G75 R0.5 F150
； （
Machining cycle
）
G75 X40 Z-50 P6000 Q3000 ；（ X tool infeed 6mm every time, tool retraction 0.5mm, rapid
returning to start point (X125) after infeeding to end point