Siemens Sinumerik 840D Operating Turning page 114

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Finishing with subprogram call-up

The finishing of contours on the turned item can either be accomplished by

direct call-up of the contour subprogram or with the support of cycles.

The purpose of this document is particularly the variant of a direct call-up.

For the sake of argument it is assumed that the work piece is already

loaded in the chuck on the finished diameter 70 mm and that the contour

has been roughed out with the usual finishing allowance.

For a subprogram call-up the following layout of the calling main pro-

gram is recommended:

Tool call-up followed by the statement of the technology data

Positioning at rapid traverse rate to the safety plane above the con-

tour starting point and simultaneously activation of the tool radius

Call-up of the subprogram

Deactivation of the radius correction, possibly on the way to the tool

changing point

The editor printout below lets you follow through the entire program. (The

program section referring to the present problem starts at block N70)

N10 G18 G54 G64 LIMS=4000

N20 G00 X200 Z300

N40 G96 S180 F0.25 M4 D1

N50 G00 X82 Z4 M8

N60 CYCLE95("SUBR2",4,0.2,0.3,0,0.25,0.1,,1,0,0,3)

N70 G00 X200 Z300

N90 G96 S220 F0.15 M4 D1

N100 G00 X0 Z2 G42

N120 G00 X200 Z300 G40 ; Radius correction clear

; Roughing tool

; Starting point for the roughing cycle

; Finishing tool

; Starting point, radius correction ON

; Call-up of subprogram

840D/828D SINUMERIK Operate

Sinumerik 828d