1. Features of CNC Machining Centers
Lab 4:
Identification

2. CNC Machine Components
Cutting Tool / Collet Caddy
Very common to have 100 or more diverse cutting tools loaded into a collet caddy
They are numbered for ease of identification
The operator must know the common tools by simple visual observation

3. Boxford Vertical Mill Cutting Tools
Collet Caddy #
Tool in Collet (different lengths) 5
2mm end mill, ball end 6
2mm end mill, slot drill 3
4mm end mill, slot drill 4
6mm end mill, slot drill 1
8mm end mill, slot drill 2
25 mm end mill, facing cutter

4. CNC Bench Vise
Notice the smooth machined surfaces; be careful not to damage surfaces

5. CAM & X-axis Table Alignment
To machine a part with CNC, the end of the tool must be known relative to the bench vise, x-axis table, or some other fixed distance

6. Z-axis Arbor Keep the lands clean and oiled
A slight tilt will cause noticeable cut deformations
Align the protrusions with slots in the cutting tool quick change adapter body

7. Air Nozzle
Used for:
Keeping cutting area free of excessive cutting debris
Quick cleaning
When supplied with misting, provides cutting tool cooling

8. End Mill / Facing Cutter
Hogs off large amounts of material
Radius of cut very large
Provides a known surface from which to measure from
Requires workpiece to be robustly supported due to high torque created

9. Quick Change End Mill Adapter
Helps provide quick changing of cutting tools without having to use complex setup procedures

10. Power Panel
Lockable On-Off Switch
Circuit Breakers
Power Cord

12. Control Panel 1.
FEED HOLD Acts as an interrupt control to the program when pressed, preventing any further tool movement until canceled. During an Automatic cycle, after canceling CYCLE START must be pressed to resume the cycle. 2.
SINGLE BLOCK With machine running in automatic mode controlled from the PC, this allows the operation of only a single block (line) of the program at a time to be toggled on/off. Press CYCLE START to proceed. 3.
CYCLE START This sets the machine in automatic mode and starts the machining from the PC program. Also used to resume an Automatic cycle after a FEED HOLD is canceled and to action the next line if Single Block is active.

13. Control Panel Move the head in the Z axis while held pressed.
4. FEED SPEED CONTROL
Provides stepless control of tool feed speed in the X, Y and Z axes from 0 to 100% in 10% increments.
5. JOG TABLE AXIS CONTROLS
These four buttons control manual movement of the table in the X and Y axes.
Move the table in the X axis while held pressed.
Move the table in the Y-axis while held pressed.
6. JOG HEAD AXIS CONTROLS
Move the head in the Z axis while held pressed.
Pressing this button together with any of the other six axis control buttons provides rapid movement of the axes in the indicated direction.
   
Move the head in the Z axis while held pressed.
Pressing this button together with any of the other six axis control buttons provides rapid movement of the axes in the indicated direction.
   
Move the head in the Z axis while held pressed.
Pressing this button together with any of the other six axis control buttons provides rapid movement of the axes in the indicated direction.

14. Control Panel Move the head in the Z axis while held pressed.
7. MANUAL When lit, machine is operated from control panel (Manual mode). Pressing MAN puts light out and machine is controlled by computer (Automatic mode). Press MAN again to revert to manual mode operation.
8. AIR MIST CONTROL Switches on or off the optional air mist coolant when fitted.
9. DATUM M/C - PROGRAM ABORT After initially powering up the machine and pressing the Power Reset button (23), with the machine in Manual mode (Manual mode button lit) press to datum the machine axes.
With the machine in Manual mode, the machine can be re-datumed at any point. This should always be done if a physical stall of the axes has occurred.
During an Automatic Cycle with a Feed Hold (1) active, pressing will Abort the current job.
   
Move the head in the Z axis while held pressed.
Pressing this button together with any of the other six axis control buttons provides rapid movement of the axes in the indicated direction.
   
Move the head in the Z axis while held pressed.
Pressing this button together with any of the other six axis control buttons provides rapid movement of the axes in the indicated direction.
   
Move the head in the Z axis while held pressed.
Pressing this button together with any of the other six axis control buttons provides rapid movement of the axes in the indicated direction.
   
Move the head in the Z axis while held pressed.
Pressing this button together with any of the other six axis control buttons provides rapid movement of the axes in the indicated direction.

15. Control Panel
10. TOOL CHANGE With auto tool changer fitted, press to change to next tool automatically.
11. TOOL RELEASE Releases the tool holder from the spindle if fitted with the auto tool changer. Guard door must be open and tool holder held.
12. WORK HOLDING UN-CLAMP Controls un-clamping of workpiece in pneumatic work holder vice, when fitted.
13. WORK HOLDING CLAMP Controls clamping of workpiece in pneumatic work holder vice, when fitted.
14. DOOR OPEN Controls opening of the automatic doors when fitted.

16. Control Panel
15. DOOR CLOSE Controls closing of the automatic doors when fitted.
16. SPINDLE CONTROLS These control the speed and direction of rotation of the spindle.
Spindle Forward - Pressing this button starts the spindle rotating forward. Holding it down increases forward speed. Pressing and holding the 'Spindle Reverse' button reduces speed in the forward direction.
Spindle Reverse - Pressing this button starts the spindle rotating in reverse direction. Holding it down increases spindle speed in reverse direction. Pressing and holding the 'Spindle Forward' button reduces speed in the reverse direction.
Spindle Stop - Pressing this button stops spindle rotation.

17. Control Panel
17. EMERGENCY STOP Pressing this pushbutton stops all machine movement and switches off the electronics, and the button locks in the depressed position.
If the machine is in production, an appropriate message is displayed on the PC screen.
The button must be turned to release it and the Hard Reset button (23) pressed to enable the machine to be started. The machine must be datumed using the Datum M/C key (9).
If the machine was performing a production cycle, the cycle must be repeated from the beginning.