Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 609)

100

101

Cylindrical Grinding Fixed Cycles

Chapter 17

17-35

I -- medium plunge distance

I defines the medium plunge distance. If I is programmed it also defines

the endpoint of the previous plunge motion (end point of rough plunge if R

is programmed or rapid if no rough plunge is programmed). If I is not

programmed the medium plunge phase of the cycle is not performed.

Always program I as an unsigned incremental value. Measure I along the

X axis from the final plunge depth programmed with the X word. I must

be smaller than the previously programmed plunge distance (t ypically R).

The wheel begins to plunge the medium plunge distance once the R plane

has been reached. The I plunge is performed at the feedrate E.

Q -- fine plunge distance

Q defines the fine plunge distance. If Q is programmed i t also defines the

endpoint of the previous plunge motion. Always program Q as an

unsigned incremental value. Measure Q along the X axis from the final

plunge depth programmed with the X word. Q must be smaller than the

previously programmed plunge distance (typically I). The wheel begins to

plunge the fine plunge distance after the I plunge is completed. The Q

plunge is performed at the ,F feedrate.

K -- blend distance

K defines the distance of the blend move in the G89 cycle. Always

program K as an incremental value. K can be a signed value (+ or --).

Measure K in the signed direction along the Z axis from the shoulder end

point determined with the Z word. The blend is performed at the ,E

feedrate. The wheel performs the blend move after the X plunge depth has

been reached and any spark-out (L) has completed.

F -- coarse plunge feedrate

The feedrate entered here is for the coarse plunge phase R. F must be

within the range of legal F words defined for your system. If no F word is

programmed, then the last F word executed in the part program is used as

the coarse plunge feedrate. An F word must be programmed when or

before the G89 mode is entered. Single digit F words are valid for the

coarse plunge feedrate. Programming F0 select s the maximum cutting

feedrate configured in AMP.

This parameter is the system F word. Programming it here alters the

feedrate for any subsequent axis motion. This feedrate can be programmed

in IPM, IPR, or V/D feed modes.

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Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario Pagina 609

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