GSK GSK988TA, Manual

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GSK988TA/GSK988TA1/GSK988TB Turning Center CNC System User Manual 【 Programming & Operation 】
94
Ⅰ
Programming
△ △
( d+ i)
（
radius value
），
i.e.,
：
Dn → An+1
，
then executes the Step
① （
start the next axial
cutting cycle
）
; after X executes
△ △
( d+ i)
（
radius value
），
the tool infeed end point reaches Af
or is not between Dn and Af
，
X performs the rapid traverse to Af
，
then, executes the Step
① ，
and starts the last axial cutting cycle
；
X
⑦
rapidly returns to the start point A, and G74 execution processing ends.
Example: Fig. 2-51
Fig.2-51
Program:
O0007 ；
G0 X40 Z5 M3 S500
； （
Start spindle and position to start point of machining
）
G74 R0.5 ； （ Machining cycle ）
G74 X20 Z-20 P3000 Q5000 F50
；
(Z tool infeed 5mm and tool retraction 0.5mm each time;
rapid return to start point(Z5) after cutting feed to end
point(Z-20), X tool infeed 3mm and cycle the
above-mentioned steps)
M30 ； （ End of program ）
2.19.6 Radial Grooving Multiple Cycle G75
Command function: Axial (Z) tool infeed cycle compounds radial discontinuous cutting cycle:
Tool infeeds from start point in radial direction, retracts, infeeds again, and again and again, and last
tool retracts in axial direction, and retracts to position in radial direction, which is called one radial
cutting cycle; tool infeeds in axial direction and execute the next radial cutting cycle; cut to end point
of cutting, and then return to start point (start point and end point are the same one in G75), which is
called one radial grooving compound cycle. Directions of axial tool infeed and radial tool infeed are
defined by relative position between end point X
（ U ） Z （ W ） and start point of cutting. G75 is used
to machine the radial loop groove or column surface by radial discontinuously cutting, breaking stock
and stock removal.
Command format
：
G75 R
（
e
）；
G75 X
（
U
）
Z
（
W
）
P
（
∆ i
）
Q
（
∆ k
）
R
（
∆ d
）
F
；
Command explanations:
1. The cycle movement is executed by X （ W ） and P （ ∆ i ） blocks of G75, G75 is not executed when
there is no X(U) in G75 block. When only “G75 R
（
e
）；
” block is executed and only No.5139