GSK GSK988TA, Manual

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GSK988TA/GSK988TA1/GSK988TB Turning Center CNC System User Manual 【 Programming & Operation 】
80
Ⅰ
Programming
Note 2: The finishing allowance is specified to X direction, is invalid for Z direction.
Note 3: When the current grooving is completed, the tool retraction amount is left to make the tool
approach the workpiece (Label 25, 26) with G1 speed after the current grooving is done to
execute the next grooving. When the retraction amount is 0 or the left distance is less than
retraction amount, the tool approaches the workpiece with G1 speed.
Note 4: The finishing path (ns ～ nf block), Z dimension must mononously change (always increase or
decrease)
Note 5: When there is an arc in finishing path (ns
～
nf), # 3410 parameter (the arc radius permits error)
cannot be non-zero, i.e., the permitting function of arc radius error cannot be activated.
Note 6: Radius error is irrelevant to cutting allowance, and radius error is permitted and checks whether
the alarm occurs.
2.19.2 Radial Roughing Cycle G72
Command function ： G72 is divided into three parts:
⑴
defining the travels of tool infeed and tool retraction, the cutting speed, the spindle speed and
the tool function in roughing;
⑵
defining the block interval, finishing allowance;
⑶
for some continuous finishing path, counting the roughing path without being executed
actually when G72 is executed.
According to the finishing path, the finishing allowance, the path of tool infeed and retract tool,
the system automatically counts the path of roughing
，
the tool cuts the workpiece in paralleling with Z,
and the roughing is completed by multiple executing the cutting cycle tool infeed → cutting feed → tool
retraction. The start point and the end point of G72 are the same one. The code is applied to the
formed roughing of non-formed rod.
Command format
： △
G72 W( d) R(e) F S T (1)
△ △
G72 P(ns) Q(nf) U( u) W( w) (2)
N (ns)……;
………;
……F;
……S; (3)
……;
N (nf) ……;
Code specifications:
1. ns
～
nf blocks in programming must be followed G72 blocks. If they are in the front of G72
blocks, and after the system executes roughing cycle, and then executes the next program
following G72;
2. ns
～
nf blocks are used for counting the roughing path and the blocks are not executed when
G72 is executed. F, S, T codes of ns
～
nf blocks are invalid when G72 is executed, at the
moment, F, S, T codes of G72 blocks are valid. F, S, T of ns
～
nf blocks are valid when
executing ns
～
nf to code G70 finishing cycle;
3. There are G00,G01 without the word X(U) in ns block, otherwise the system alarms;
4. X,Z dimensions in finishing path(ns
～
nf blocks) must be changed monotonously (always