Deck 5: Tool and Workpiece Setup

Question 1

What is the major advantage of the reference tool method?

Answer 1

The chief advantage of the reference tool method is that it makes it easy to set up subsequent jobs in the machine without having to touch off each tool again. The operator can simply load the reference tool into the spindle and touch the top of the workpiece. At this point, the Z-offset is set and machining can begin. The other tools do not have to be set again because they are already set relative to the reference tool.

Question 2

____ coordinates are not given from a fixed reference point, but rather from the previous point.

A) Incremental
B) Absolute
C) Original
D) CNC

Answer 2

A

Question 3

A(n) ____ is a single linear direction used in the Cartesian coordinate system to locate points in space (e.g., left-right, in-out, up-down).

A) origin
B) axis
C) point
D) plane

Answer 3

B

Question 4

The simplest coordinate system related to machining has just two dimensions.

Question 5

The ____ is the difference between the length of a cutting tool and a reference value.

A) machine zero
B) origin
C) height offset
D) reference position

Question 6

Tool presetters tend to be less accurate than manually touching off the tool to the workpiece.

Question 7

Machine zero is also called ____.

A) machine home
B) polar home
C) machine position
D) reference home

Question 8

A(n) ____ coordinate is given by stating the radius from the origin and the angle of rotation.

A) spherical
B) incremental
C) polar
D) Cartesian

Question 9

The fixture offset is also called the ____ offset.

A) work
B) preset
C) width
D) manual

Question 10

____ is the act of moving the tool centerline away from the part edge in order to maintain the correct dimensions.

A) Referencing
B) Jogging
C) Installation
D) Compensation

Question 11

The chief advantage of the reference tool method is that it makes it easy to set up subsequent jobs in the machine without having to touch off each tool again.

Question 12

The role of coordinates in NC programming is quite simply to establish the position of the cutting tools in relation to the workpiece.

Question 13

The diameter ____ is a value stored in the offsets register in the control that will be used for automatic cutter compensation.

A) offset
B) length
C) work
D) fixture

Question 14

Tool presetting is a method commonly used to establish the length offset and ____ of a newly installed cutting tool.

A) width
B) diameter
C) hardness
D) accuracy

Question 15

What is the origin in the Cartesian coordinate system?

Question 16

Where is the coordinate system placed on the workpiece?

Question 17

What is the work zero?

Question 18

No modern machine tools can establish multiple work offsets to define multiple work zeros.

Question 19

What is the primary use of tool presetting?

Question 20

Many CNC machine tools (particularly lathes) are now equipped with "tool ____" that use an electronic measuring device to establish the tool offsets.

A) setups
B) adjusters
C) probes
D) references