Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 640)

100

101

Skip and Gauge probing Cycles

Chapter 19

19-2

ATTENTION: We do not recommend using a skip block from

any fixed cycle block (such as multi-pass face grinding or a

turning). If you do choose to execute a skip block in a fixed

cycle mode, be aware that the block that is skipped when the

trigger occurs can be a cycle generated block. If this is the case

the cycle will continue normal execution skipping only the

portion of the cycle that was executing when the trigger

occurred. If the generated block skipped is a crucial portion of

the cycle, damage to the part or machine tool can occur.

Use external skip functions to terminate the execution of motion

commands in a block when the control receives a signal through PAL.

When the program block is terminated any remaining axis motion

generated by the block that has not been performed remains unexecuted

(other non-motion commands are still performed). The control continues

normal program execution at the beginning of the next block following the

skipped block.

The external skip function is controlled by G31, G31.1, G31.2, G31.3, and

G31.4. Your system installer determines what signal (such as a touch

probe, manual switch, etc.) corresponds to each G31 code in PAL. Your

system installer can choose different signals to correspond to G31.2,

G31.3, and G31.4. G31 and G31.1 are functionally the same, always using

the same external signal and the same AMP defined feedrate. With proper

PAL programming, you can also use a G04 dwell in seconds as an external

skip function.

The format for G31 external skip blocks is:

G31 X__ Z__ F__;

Where: Is :

G31

anyofthe G codesintheG31 seriesor G04. Usetheone thatisconfiguredto

respondto thecurrentexternal skipsignal device thatis being used.

X, Z

theendpoint ofthemove ifno external skipsignal is received. These also

determi ne the directionthatthewheel travelsin.

theexternal skipfunctionfeedrate. Ifno value is enteredhere, theexternal skip

function executesat eitherthecurrentlyactivefeedrate,or thefeedrate defined

forit in AMP(based on whethertheAMPparameterUse AMPSkip Feedrate is

setto ”NO”or ”YES”). A value enteredhere replacesthecurrentlyactive

feedrate and supersedestheAMPdefinedfeedrate.

The G31 series of G codes always produces linear motion, regardless of

the current mode active at their execution. After their completion, the

control returns to the operating mode active before the external skip block

was read (G00, G01, G02, G03).

19.1

ExternalSkip

Functions (G31 codes)

1 2 ... 635 636 637 638 639 640 641 642 643 644 645 ... 819 820

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Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario Pagina 640

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