CNC
Routers
Router Bits
Safety
Mystery
100
What does CNC stand for?
Computer Numerical Control
100
What is the name of the router part that holds the tool bit?
Collet
100
What types of bits are these?
Straight bits
100
What should you do to the router before changing bits or making adjustments?
Unplug the router from the electrical outlet
100
Identify the point(s) and the corresponding ordered pair(s) in Quadrant IV
Point B (3, -4) and Point F (4, -3)
200
What is the file extension of a postprocessor (CNC) file?
.NC (G-code - CNC language)
200
What are the 2 MAIN parts of a portable router?
1. Motor
2. Base
200
What type of router bit was used to create the decorative edges on your mounting board?
A. 60 degree V-bit
B. 90 degree V-bit
C. Roman Ogee bit
D. Straight bit
C. Roman Ogee bit
200
Where should your workpiece be when starting a router?
Away from the bit. Make sure the bit is NOT in contact with the work.
200
On the Cartesian Coordinate System, Quadrant II has which of the ordered pairs?
A. ( -X, -Y )
B. ( X, Y )
C. ( -X, Y )
D. ( X, -Y )
C. (-X, Y)
Quadrant II has ordered pairs with a negative X and a positive Y.
300
Which step in the CNC workflow would you use a CAD program?
A. Finish and Assembly
B. Toolpaths
C. Machining
D. Concept
E. Design
E. Design (step 2)
Computer Aided Design (CAD) programs are used in step 2 of the CNC workflow.
CAD programs are used to create 2D vectors and 3D components. These must be defined before creating toolpaths (step 3).
300
What is the roller bearing wheel attached to some router bits used for?
It acts like a guide/ fence.
When using a straight bit without a roller-bearing wheel, you must set up a fence!
300
What type of router bit is this? Give an example of when you would use one.
V-bit
300
When using a __(type of router)__ or a __(type of router)__ you must make sure the workpiece is securely clamped or otherwise secured.
Portable router
CNC machine
300
What part of the router controls the depth at which the bit cuts?
Depth adjustment ring
400
What type of toolpath you would use to engrave the lettering on a board?
A. Profile toolpath
B. Engraving toolpath
C. Pocket toolpath
D. Carving toolpath
B. Engraving toolpath
400
In which direction do you feed a piece of wood to be cut on a...
...router TABLE?
...PORTABLE router?
(label the feed directions of both)
Router table: RIGHT to LEFT (think about the HH MB)
Portable router: LEFT to RIGHT
400
What type of router bit would you use to create a rabbet joint?
Straight bit
400
At least how much of the router bit shank length must be in the collet?
At least 1/2 in.
400
What is the file extension of a drawing file made in the Vectric software program?
A. .CRV
B. .NC
C. .DRW
D. .VCR
A. .CRV
This is the file extension for a drawing file for the Vectric CAD/CAM program. This type of file will allow you to reopen and edit the file.
500
List the steps in the setup procedure for running a CNC file.
1. Orient the stock
2. Secure the workpiece to the bed
3. Set up the X, Y, and Z coordinates
4. Load, preview, and if correct run the file
500
Name 3 advantages of using a router table over a portable router.
1. Dust collection system
2. Table & fence = more stablility & control
3. Can safely route small pieces
500
What sides should you route on your workpiece first when creating decorative edges? Why?
Route both ends first, then both edges to reduce the effects of tear out.
500
Describe the appropriate PPE and attire in a shop or when using a router/ CNC.
- Loose clothes rolled up/ tucked in/ removed
- no jewelry
- Safety glasses and hearing protection if requested
- hair tied back
- Closed toed shoes
- Appropriate length tops + bottoms
500
What tool is used to set the “Z” position set on the CNC machine?
Z touch off tool