Rockwell-automation 8520-GUM 9/Series CNC Grinder Operation and Progra Uživatelský manuál stáhnout pdf (Strana 406)

100

101

AxisMotion

Chapter 12

12-34

This section covers the following topics:

Topic: On page:

SurfaceGrinder,No S--word 12-35

SurfaceGrinder,S--wordfor Wheel Speed 12-36

CylindricalGrinder, S--word forPartSpeed 12-37

CylindricalGrinder, S--word forWheel Speed 12-40

Noteson ConstantSurfaceSpeed Mode (G96) 12-42

CSSAxis Selecti on 12-45

CSSExamples 12-46

RPMSpindle Speed Mode(G97) 12-51

Grinding speeds are established by setting spindle speeds. In the case of

cylindrical grinders, there are two separate spindles , the grinding wheel

spindle and the part spindle. The control uses the S--word to control the

speed of one of the spindles. If a machine requires more than one spindle,

the second must be controlled manually or through the PAL program .

Refer to the documentation prepared by your system installer for details.

The S--word controlled spindle operates i n one of the following modes:

Constant Surface Speed Mode (G96) - maintains the speed of the

grinding wheel surface relative to the part surface at a constant rate.

This relative speed is measured as a surface speed with units of m/min,

m/sec, in/min, or in/sec.

To maintain a constant surface speed when grinding a cylindrical part at

different diameters, the grinding wheel or part spindle speed should be

decreased as diameters are increased. This maintains a constant speed

of the part surface relative to the grinding wheel surface. The same is

true when dressing a wheel. In that case constant surface speed applies

to the wheel speed relative to the dressing tool.

RPM Spindle Speed Mode (G97) - maintains a constant spindle speed

equal to the programmed S--word. This speed is independent of the

working diameter of the part or the grinding wheel. G97 is described in

detail on page 12-51 of this chapter.

12.5

Spindle Speed Control

1 2 ... 401 402 403 404 405 406 407 408 409 410 411 ... 819 820

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