Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 38)

Basic Control Operation
Chapter 2
2-14
Table 2.D
Functions of the Buttons on the Push-Button MTB Panel
Switch or Button Name = Default for Push-Button MTB Panel How It Works
SPINDLE SPEED OVERRIDE Selects the override for programmed spindle speeds in 5% increments within a range of 50% to 120%.
SPINDLE or
SPINDLE DIRECTION Selects spindle rotation, clockwise (CW), spindle stop (OFF), counterclockwise (CCW). Can be
overridden by any programmed spindle direction command.
FEEDRATE OVERRIDE Selects a feedrate override percentage for the feedrate programmed with an F--word in any of the
feedrates modes (G93/G94/G95) and the reciprocation feedrate programmed with an E--word.
<FEEDRATE OVERRIDE> has a range of 0% to 150% of the programmed feedrate and alters the
programmed feedrate in 10% increments. When set to 0%, the control is effectively in feedhold.
RAPID FEEDRATE OVERRIDE Selects the override for rapid feedrates. Select from F1, 25%, 50%, and 100% where F1 is a rapid
feedrate override setting established in AMP by the system installer.
EMERGENCY STOP This button stops machine operation and disables the spindle and axis drives when pressed.
E-STOP RESET This button resets an emergency stop condition when pressed. Before pressing this button the
condition that caused the E-Stop should be resolved.
CYCLE START The control begins or resumes part program execution, MDI program execution, or program check
when this button is pressed.
CYCLE STOP The control stops part program execution, MDI execution, or program check when this button is
pressed. If pressed during the execution of a program block a cycle suspend state occurs.
SINGLE BLOCK The control executes or checks one block of a part program or MDI entry each time the
<CYCLE START> button is pressed when single block is active.
AXIS/DIRECTION These buttons are used for manual operations. They select an axis and direction when
<JOG SELECT> is set for continuous, incremental, or home. If <JOG SELECT> is set for
handwheel, these buttons select an axis only. Direction is then determined by handwheel rotation.
TRVRS Hold this button down while executing a continuous jog move to override the active feedrate and jog an
axis in rapid traverse.
F1 - F4 The functions for these buttons are assigned by the system installer. Refer to the documentation
prepared by the system installer for details.
JOG RETRACT Use jog retract to jog a cutting tool away from the workpiece during automatic or MDI program
execution. The control can retrace the jog moves and return the cutting tool automatically to the
workpiece by pressing <CYCLE START>. Refer to chapter 7 for more on this.
BLOCK RETRACE To retrace the tool path in a part program already executed (up to 15 blocks), press this button.
ON Turns on power to the control.
OFF Turns off power to the control.
Important: Many of the override switch settings may be disabled by
programming the correct M-code or setting a particular paramacro
parameter. Refer to their respective sections for details on these features.