Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Instrukcja Użytkownika Pobierz pdf (Strona 570)

100

101

Surface Grinding Fixed Cycles

Chapter 16

16-20

For example, assume that the G19 (YZ) plane is active and you have

configured the Y axis as axis one and the Z axis as axis two for that plane.

The G84 cycle would execute as described for the G83 cycle except that

the cross pick moves would be made by the Y axis and the plunge moves

would be made by the Z axis.

Important: It is the programmer’s responsibility to make sure that the

crossover and reci procating moves extend beyond the part sufficiently such

that the plunge move can be completed before the wheel comes back in

contact with the part. Crossover and plunge moves begin as the

reciprocation axis decelerates. Therefore, feedrate, acceleration and

deceleration should be considered for all axes involved.

The format for the G85 cycle is as follows:

G17(XY);

G85Z__K__X__I__Y__Q__L__F__E__P__D__;

G18(ZX);

G85Y__J__Z__K__X__Q__L__F__E__P__D__;

G19(YZ);

G85X__I__Y__J__Z__Q__L__F__E__P__D__;

Table 16.E summarizes the G85 cycle parameters. For a detailed

description of these parameters, see the text below and page 16-8.

Table 16.E

G85 Cycle Parameters

Parameter: Definition: Default Value: PossibleValue:

Non-planeaxis

reciprocationprimaryreversalpoint from last cycle programmed abs. or inc.

Reciprocation axis integrand

reciprocationsecondaryreversal point from last cycle programmed abs.or inc.

Planeaxis1

plunge depth fromlast cycle programmed abs.orinc.

Planeaxis1 integrand

plunge pickat start fromlast cycle programmed inc.only

plunge pickat crossover plunge pickat start inc.only

Planeaxis2

crossoveramount fromlast cycle programmed abs.orinc.

numberof spark-outpasses zero zeroto 999

plunge pickand crossoverfeedrate lastfeedrateprogrammed valid F word

reciprocationfeedrate from last cycle or last F valid F word

3 forG85 2 forG85.1

dressprogramnumber from last cycle programmed valid programnumber

numberof auto-dressexecutions zero zeroto 999

mustbe programmed

musthave been programmed i n some previousblock if omitted

optional

16.7

G85 or G85.1 Continuous

Plane Grinding (Axis 1)

1 2 ... 565 566 567 568 569 570 571 572 573 574 575 ... 819 820

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