Programming of CNC Machines. Ken Evans
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SPDL DEC-Spindle Speed Decrease
Pressing this button causes the spindle speed to decrease.
SPDL 100%
Spindle override 100%: Sets an override of 100% for the spindle motor speed.
SPDL INC- Spindle Speed Increase
Pressing this button causes the spindle speed to increase.
Figure 13 Spindle Buttons
SPINDLE
These buttons are used exclusively during the manual operation of the machine for setup functions. The descriptions below explain their specific function:
SPDL CW-Spindle Rotation CW
By pressing this button while in one of the Operation modes; HOME, JOG, INC JOG or MPG the spindle will start rotation in the clockwise (CW) direction. The spindle r/min is adjusted by using the SPDL DEC, SPDL 100%, or SPDL INC buttons. The last r/min commanded in the program or used while in this mode is retained and will restart upon pressing the SPDL 100% button. When the machine is first started, there has been no value established for the r/min, so if one of these buttons is pressed while in the modes described above an alarm will result. An r/min must be input via MDI or by activating the program. From that point on, as long as the machine is not turned off, the r/min will be activated at the last commanded value when one of these buttons is pressed.
SPDL STOP-Spindle Stop
Pressing this button stops spindle motor rotation while in one of the Operation modes listed above. Pressing this button will NOT stop the spindle while in any of the Execution modes.
SPDL CCW-Spindle Rotation CCW
By pressing this button while in one of the Operation modes HOME, JOG, INC JOG or MPG the spindle will start rotation in the counterclockwise (CCW) direction. The spindle r/min is set by using the SPDL DEC, SPDL 100%, or SPDL INC buttons. The last r/min commanded in the program or used while in this mode is retained and will restart upon pressing the SPDL 100% button.
AXIS/DIRECTION
These buttons are used to select the Manual feed axis direction. Pressing these buttons executes movement along the selected axis in the selected direction by jog feed (or step feed) when the corresponding button is set to on in the jog feed mode (or step feed mode). The same is true for each of the axes where buttons are present.
Figure 14 Axis Direction Buttons
−X
When pressed, this button executes movement along the X axis in the negative direction with respect to the coordinate system.
+Z
When pressed, this button executes movement along the Z axis in the positive direction with respect to the coordinate system.
−Z
When pressed, this button executes movement along the Z axis in the minus direction with respect to the coordinate system.
+X
When pressed, this button executes movement along the X axis in the positive direction with respect to the coordinate system.
Note: The Y axis buttons for milling machines are not depicted in the operator panel in Figure 1. The following are their descriptions.
−Y
When pressed, this button executes movement along the Y axis in the negative direction with respect to the coordinate system.
+Y
When pressed, this button executes movement along the Y axis in the positive direction with respect to the coordinate system.
TRVRS-Rapid Traverse
Caution: When using this rapid traverse function be sure that all machine movements will not cause interference during motion!
Press this button to activate jog feed at a rapid traverse rate. Use this button to perform rapid movements along a previously chosen axis. For example, press the button TRVRS then the X positive button, the X axis will move at rapid traverse until the button is released.
Rapid Traverse Override (%)
(Not shown on this operator panel model)
Some operator panels include a % override dial or buttons that can be used to control the rapid feed rate. This switch or these buttons are used to reduce the rapid feed rate (G00). If it is positioned at 100, this corresponds to 100% of the rapid feed rate that the machine can generate. Buttons are commonly incremented in steps of 10, 25, 50 and 100%.
Figure 14b Rapid Traverse Override Buttons
In the above illustration, F0 corresponds with 10% (as determined by parameter).
COOLANT
During manual or automatic operation, these buttons may be used to activate or stop the flow of coolant.
CLNT ON-Coolant ON
When this button is pressed the supply of coolant is started.
CLNT OFF-Coolant OFF
When this button is pressed the supply of coolant is stopped.
CLNT AUTO-Coolant Auto Mode
This button is pressed to activate the automatic start and stoppage of coolant flow during program execution when called by program words M08 and M09 respectively.
Figure 16 Common Control Panel
CONTROL PANEL
The control panel described here is quite typical of the control panels used on CNC machines. The control panel switches and buttons may be distributed differently on the panel for each individual machine; however, the purpose and function of each switch and button remains the same. Some control panels are equipped with additional buttons or switches not shown here. Definitions and applications of these buttons or switches can be found in the manufacturer instruction manuals for the machines.
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