Deck 7: Codes for Positioning and Milling

Question 1

Rapid positioning will always move in a straight line from the current position to the programmed position.

Answer 1

False

Question 2

What will happen if calculations are not accurate for the X-, Y-, I-, and J-coordinates?

Answer 2

Full-quadrant arcs are relatively easy to program without too many calculations. However, arcs that start or end at an odd angle may require the use of trigonometry to find the end points or the I- and J-values. We must be careful to make these calculations with a high degree of accuracy and not let rounding errors stack up. The calculations will need to be accurate to at least 0.001" for the X-, Y-, I-, and J-coordinates. Otherwise the machine will produce an error message telling us that the arc cannot be made with these values.

Question 3

When programming toolpaths, you will never need to return to the machine zero on any axis.

Answer 3

False

Question 4

Using R with circular interpolation is straightforward-you simply use the ____ of the arc instead of I and J.

A) chord length
B) angular measure
C) area
D) radius

Question 5

Full-circle arcs always start and end in the same place, and the center point is found in the same manner as any other arc.

Question 6

G-____ is the code used to perform rapid traverse.

A) 00
B) 01
C) 22
D) 41

Question 7

When you use incremental positioning with circular interpolation, the end point of the arc will simply be the ____ from the start of the arc to the end point of the arc.

A) incremental distance
B) incremental angle
C) absolute distance
D) absolute angle

Question 8

Circular interpolation is produced by a motion control system that is moving ____ axes of the machine tool at the same time.

A) one or two
B) at least two
C) the accelerating
D) the decelerating

Question 9

How do you find out if a motion control system error is within the acceptable tolerance?

Question 10

Every motion control system will have error.

Question 11

____-in/____-out is the act of entering or exiting a finished toolpath at a shallow angle or arc to ensure a consistent finish and to prevent gouging that can be caused by tool deflection.

A) Lead
B) Interpolation
C) G00
D) Line

Question 12

Codes that carry out machining operations or establish machine settings are known as ____ codes.

A) preparatory
B) coordination
C) linear
D) syntactic

Question 13

What is rapid traverse used for?

Question 14

The rules of structure that must be followed when writing in a specific language are called ____.

A) coordinates
B) syntax
C) preparations
D) decimals

Question 15

____ is a term used to describe the process of passing through all points.

A) Preparation
B) Monotonicity
C) Interpolation
D) Coordination

Question 16

Which code cuts in a clockwise direction?

A) G00
B) G02
C) G03
D) G05

Question 17

When using G28, it is very easy to make the mistake of setting the intermediate coordinates to zero and expecting upward movement as with incremental positioning.

Question 18

To determine the sign of R, draw a ____ between the end points of the arc.

A) radius
B) square
C) chord
D) second arc

Question 19

Discuss the G28 code.

Question 20

What are the I- and J-words?