Siemens Sinumerik 840D Operating Turning page 122

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Repetitions of parts of the program

If a certain number of NC-blocks is to be repeated at another part of the

program, the instruction REPEAT is available.

The instruction requires a start marker as a jump destination. An end

marker can possibly be included for clarity.

The end marker is only really necessary if the repeat instruction is not di-

rectly in the succeeding block of the part of the program to be repeated

(see Section 4).

Example without end marker, single repeat:

N40 G96 S160 F0.2 M4 D1

N50 G00 X82 Z0 M8

N60 G01 X-1.6

N80 G00 X80; raw dimension

N100 G00 G42 X=IC(-4) Z1

Jump to start

N110 G01 Z-20

N120 X=IC(6)

N130 G00 G40 Z4

N140 G01 X=IC(-6)

N150 REPEAT LBL10

N160 G00 X200 Z300

After the blocks N90 to N140 have been repeated the program will be con-

tinued with block N160.

The program section (N90 to N140) is already executed once during the

normal run of the program. With the "REPEAT"-instruction this will be car-

ried out a second time.

If a program section is to be repeated several times, the number of repeti-

tions must be stated with the address "P" (see page 7).

Roughing tool

Single repetition of

the program section

Program continua-

tion after the repeti-

840D/828D SINUMERIK Operate

Sinumerik 828d