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 ā€œZā€ position set on the CNC machine?

Z touch off tool