Programming of CNC Machines. Ken Evans
to be moved, press one of the Speed/Multiply buttons as described in more detail below.
Caution: If the handle is rotated quickly while the magnitude is set at X100 or X1K the tool will move at a rapid feed rate and a crash could occur!
Teach
This button activates the Teach-in Jog or Teach-in Handle mode. When this mode is used, the movements of the axes are recorded while in either Jog or Handle mode. Machine positions along the X, Y, and Z axes obtained by this manual operation are stored in memory as a program position and are used to create a program. These movements can then be executed just as with any program. Consult the manufacturer operator’s manual for detailed descriptions on its proper use. Not all controls have this feature.
Offset Mesur-Offset Measurment
When this button is pressed, the OFFSET MEASURE mode is selected and the position of the tool in relation to the coordinate system is written into the tool or work offset for the active axis.
SPEED/MULTIPLY
When INC JOG is selected from the Operation Mode buttons, the incremental step selected by the Speed/Multiply buttons determines the magnitude of the displacement along the chosen axis in the selected direction. When one of these buttons is pressed and released, the movement will be as follows:
X1 = a movement of .0001 inch or .0025 millimeters (mm)
X10 = a movement of .001 inch or .0254 mm
X100 = a movement of .010 inch or .254 mm
X1K = a movement of .100 inch or 2.54 mm
The buttons used to select the axis and the direction of movement are located on the mid to upper right part of the operator panel as shown in Figure 1 for this controller.
Figure 12 Speed/Multiply Buttons
For example, to displace the tool along the X axis in a positive direction by the value of .010 inch, follow these steps:
• Press the INC JOG button.
• Press the X100 button.
• Press the button X once.
Each time the button is pressed, a displacement of the selected value results.
If the JOG mode is selected when one of these buttons are activated and the selected axis button is pressed and held in, the movement will occur at feed as indicated by LOW, MEDL, MED, MEDH or HIGH. The operator can also use the % Traverse Feed override dial to further control this feed rate.
When the MPG Operation mode is selected, the incremental step selected by the Speed/Multiply buttons determines the magnitude of the movement along the chosen axis in the selected direction.
Each button setting corresponds with the scale of the Handle. One full revolution of the Handle (360°) corresponds to 100 units on the scale. On the button X1 the X means “times” the minimum increment.
When the button is pressed for:
X1, turning the handle by one unit corresponds to the movement of .0001 inch or .0025 mm.
X10, turning the handle by one unit corresponds to the movement of .001 inch or .0254 mm.
X100, turning the wheel by one unit corresponds to the movement of .01 inch or .254 mm.
X 1K, turning the wheel by one unit corresponds to the movement of .100 inch or 2.54 mm.
Usually, X1 is used when you are precisely dialing-in the zero of the workpiece and when you are determining the tool length offset.
In manual control, you must also use the AXIS/DIRECTION buttons to determine the axis of displacement.
For example: if you need to move the machine table, with respect to the tool by 1.00” along the X axis in a positive direction, follow these steps:
• Press MPG Operation mode button.
• Press the AXIS/DIRECTION button X+
• Press the SPEED/MULTIPLY button X10.
Turn the handle one full revolution (100 units) and then check the value of the displacement on the screen. It should indicate a movement of 1.00”.
LOW
X1
The button, LOW indicates feed rate at a LOW speed while in the JOG Operation mode. The button, labeled as LOW X1 indicates that turning the handle by one unit corresponds to the displacement of .0001 inch or .0025 mm while in the MPG Operation mode.
MEDL
X10
The button, MEDL indicates feed rate at a MEDIUM LOW speed while in the JOG Operation mode. The button, labeled as MEDL X10 indicates that turning the handle by one unit corresponds to the displacement of .001 inch or .0254 mm while in the MPG Operation mode.
MED X100
The button, MED indicates feed rate at a MEDIUM speed while in the JOG Operation mode. The button, labeled as MED X100 indicates that turning the handle by one unit corresponds to the displacement of .01 inch or .254 mm while in the MPG Operation mode.
MEDH
X1K
The button, MEDH indicates feed rate at a MEDIUM HIGH speed while in the JOG Operation mode. The button, labeled as MEDH X 1K indicates that turning the handle by one unit corresponds to the displacement of .100 inch or 2.54 mm while in the MPG Operation mode.
HIGH
This button is used to indicate the feed rate at a HIGH speed while in the JOG Operation mode.
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
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