Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 608)

100

101

Cylindrical Grinding Fixed Cycles

Chapter 17

17-34

The following describes each of the cycle’s parameters.

X -- plunge end point

If in absolute mode (G90 active) then the value entered here is the X

coordinate of the plunge end point.

If in incremental mode (G91 active) then the value entered here is a signed

incremental value indicating the X distance from the start point to the end

point of the plunge motion. The start point is the coordinate of the X axis

prior to execution of the grinding cycle. The plunge end point

programmed with the X word must be a different position than the start

point of the cycle.

This parameter is “program modal,” meaning that it must be programmed

in the G89 block but will remain active once i t is programmed. If not

programmed initially, the error “PLUNGE MOTION NOT

PROGRAMMED” results.

Z -- shoulder end point

If in absolute mode (G90 active) then the value entered here is the Z

coordinate of the shoulder grind end point.

If in incremental mode (G91 active) then the value entered here is a signed

incremental value indicating the Z distance from the start point to the end

point of the shoulder grinding motion. The start point is the coordinate of

the Z axis prior to execution of the grinding cycle.

R -- coarse plunge distance

R defines the coarse plunge distance and the clearance plane for the G89

cycle. If R is not programmed the coarse plunge phase of the cycle is not

performed. Any sign programmed with the X word is ignored. Always

program R as an incremental value. Measure R along the X axis from the

final plunge depth programmed with the X word. The R plane must not be

within the contours of the rough part. Programming an R plane greater

than the starting position (starting position between the R plane and the

final depth X) is valid and will not generate an error. The axes rapid to the

R plane and perform the coarse plunge at the feedrate F.

Important: If your system installer has installed a means of enabling a

micro-feed for this cycle, the micro-feed must be enabled before the axis

completes the initial rapid traverse.

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Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario Pagina 608

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