Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Uživatelský manuál stáhnout pdf (Strana 583)

100

101

Cylindrical Grinding Fixed Cycles

Chapter 17

17-9

Once reciprocating motion begins, it continues through program block

execution until a G80 is executed. If there is no G80, reciprocation

continues until an end of program (M02, M30, M99), or an emergency stop

condition occurs. An M99 in a subprogram

simply returns program

execution to the main program and does not

cancel reciprocation.

When reciprocation or a grinding cycle is canceled by a G80 or an M99,

the reci procating axis continues to its secondary reversal point before the

control considers the G80 or M99 block completed.

This section describes the parameters that are common to all of the

cylindrical grinding cycles. See the section describing each specific cycle

for details on the parameters that directly control axis motion.

The system installer can define an axis as a diameter axis in AMP. Only

the plunge axis (X), pick axis (Z) and the reciprocation reversal points are

affected by diameter/radius programming (G07 or G08). Other parameters

are not affected by the controls diameter radius mode.

L -- number of spark-out passes or revolutions. The number entered

here (any integer from 0 to 999) indicates how many spark-out passes or

the number of spindle revolutions at which the wheel is to dwell for

spark-out after the final plunge depth has been reached. Spark-out refers to

repeating a final grinding pass or holding a final position without changing

plunge depth until there are practically no “sparks” (no m aterial being

removed) from the part surface.

The L value refers to a number of reciprocation passes for G82 and G83.

It refers to a number of dither passes for G84 with an I value programmed,

and G85 with a K value programmed. It refers to a number of spindle

revolutions for G84 without

an I value programmed, and G85 without aK

value programmed. It always refers to a number of spindle revolutions for

G86, G87, and G88. L can be number of spindle revolutions or number of

seconds to dwell during the G89 cycle.

This parameter is not

“program modal.” If a value for the number of

spark-out passes is not programmed, then no spark-out passes are executed

for that cycle.

F -- plunge or p lunge pick feedrate. The feedrate entered here is for the

plunge axis, whether it is making a continuous plunge towards the part, or

making increm ental plunges. It must be within the range of legal F words

defined for your system. If no value is entered for this, then the last F

word executed i n the part program is used as the plunge pick feedrate.

17.2

Cylindrical Grinding

Parameters

1 2 ... 578 579 580 581 582 583 584 585 586 587 588 ... 819 820

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