Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario descargar pdf (Pagina 314)

100

101

Introduction to Programming

Chapter 10

10-36

When programming an S word in a block that contai ns axis motion

commands, the PAL program has the option to temporarily suspend the

axis motion commands until the spindle reaches speed. The control can

search for and select the appropriate gear range to attain the programmed

spindle RPM. The operation of gear changing and how it is implemented

is PAL dependent. See your system installer’s documentation for details

on how a gear change operation is performed.

For details on programming spindle speeds, see page 12-34.

Important: When the miscellaneous function lock feature is activated, the

control ignores M, B, S, and T words in the part program with the

exception of M00, M01, M02, M30, M98, and M99. This feature is

activated as described on page 7-2.

You can override programmed spindle speeds with the <SPINDLE SPEED

OVERRIDE> switch on the MTB panel. This switch can be positioned in

5% increments within a range of 50 - 120%. For details, see your system

installer’s documentation.

Use the override disable M code (M49) to ignore any override set on the

MTB panel. When the override settings are ignored, the axis feedrate,

rapid feedrate, and the spindle speed values are all set to 100%. For more

information on spindle functions, see page 12-34.

Modern grinders typically require the selection of multiple control points

on the wheel for grinding different contours and dressing different profiles.

Use the wheel length offset feature to shift the control point to the various

cutting locations about the grinding wheel . Activate wheel length offsets

with a T word as described in chapter 13.

Also, use the T word to select an active dresser/wheel radius compensation

offset number. This offset compensates for the radius of wheel corners or

dresser tip and orientation relative to the part/wheel surface.

Dresser/wheel radius compensation is described in detail in chapter 15.

The control can store as many as 32 wheel length offsets and 33

radius/ori entation offsets. The actual number of available offsets on your

system is configured in AMP by your system installer. Typically each time

a different profile is dressed into t he wheel or a different part of the wheel

is used as the grinding surface, you need to activate different offsets.

The selection and activation of offsets is done by programming a T word.

A T word can be programmed in any block i n a part program.

10.5.11

T Words

(Length, Radius, and

OrientationOffsets)

1 2 ... 309 310 311 312 313 314 315 316 317 318 319 ... 819 820

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Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Manual de usuario Pagina 314

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