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Machinist Period 4 2019 Cash > Programming Concepts And Applications 150401f > Flashcards

Programming Concepts And Applications 150401f Flashcards

1
Q

List two applications where you can use sub-programs

A

Using cutter comp to rough and finish Milling using the same set of programs

Machining holes that need multiple operations, like Center drilling, spot drilling, drilling, tapping.

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2
Q

What codes would you use to end a main program?

A

M30, M02

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3
Q

What type of program is used to invoke a sub-program?

A

A main program or sub program

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4
Q

What codes would you use to end a sub program?

AIT

A

M99

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5
Q

Why would you not end a sub-program with M30?

A

It will cause the sub program to end and reset without returning to the main program

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6
Q

What code do you use to call a subroutine?

AIT

A

M97, Pnnnn identifies an N sequence number where a local subroutine starts

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7
Q

What M codes to invoke and end a sub program?

A

M98, M99

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8
Q

What is the P word used for?

A

Program number of sub program.

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9
Q

What is the L word used for?

A

Number of times sub program is executed. If omitted sub program is executed once

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10
Q

What are two benefits of using sub-programs?

A

Reduce the number of commands you write in type. Take up less memory space and reduce potential for writing, typing mistakes

To verify. Correct first time correct every time

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11
Q

What can you do to minimize the effort required to load a main program and its sub-programs?

A

Clearly specify in setup documentation, which programs are related to each job. Be sure set-up people know where to find related programs.

Include all of the programs related to a job in one text file

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12
Q

Name two applications for sub programs

A

Multiple identical Machining operations

Utility programs

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13
Q

What must the programmer specify each time the program zero point is relocated using G 52?

A

The distance from the original program zero point to its new location.

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14
Q

How Can rough and finish side Milling be done with one set of tool path coordinates?

A

Specify the toolpath coordinates twice, once for roughing once for finishing.

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15
Q

What happens when a main program ends with M 99?

A

The machine returns to beginning of the main program and executes the program again, without stopping

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16
Q

Identify five categories of applications for custom macro B

AIT WILL SHOW 2

A 
Part families
 User-created canned Cycles
 Utilities 
 Complex motions 
 Interfacing with machine accessories
17
Q

In order to execute a loop a specific number of times we need what

AIT

A

A counter, usually set to a value of 1

18
Q

When mirror image is activated, what happens to the polarity of the mirrored axis?

AIT

A

It is reversed

19
Q

What aspect of side Milling changes when it is mirrored?

AIT

A

Climb becomes conventional Milling

20
Q

If a part is mirrored on the X-axis what happens to the coordinates on the Y-axis?

A

Nothing, Y stays the same

21
Q

What are the two ways of activating mirror-imaging?

A

Manually and automatically

22
Q

What is the difference between polar coordinates and coordinate rotation?

A

Polar coordinates gives you the ability to rotate just one coordinate.
Coordinate rotation lets you rotate a whole series of coordinates while maintaining the relationship among the coordinates

23
Q

When would you use coordinate rotation?

A

When you have to mill a shape more than once around the diameter

24
Q

Explain the four words involved with coordinate rotation,

G68
G69
X and Y
R

A

Instate coordinate rotation
Cancel coordinate rotation
Rotation Center
Rotation angle

25
Q

Define the term helical interpolation

A

Combination of linear and circular interpolation, three axes move, usually X and Y circular path and Z linear

26
Q

What are the applications for helical Milling?

A

Thread Milling operations, primary, plunge Milling into solid surfaces, counter boring

27
Q

When helical Milling a blind hole internal thread with a multi tooth cutter in which direction is the cutter fed?

AIT

A

Bottom to top. Use G3 instead of G2 to keep chips from interfering with Machining

28
Q

What is a limitation of sub programming?

A

Variations are not permitted

29
Q

What lets you create just about any kind of motion that is definable with an arithmetic formula?

A

Custom macro B

30
Q

You can never activate mirror-imaging from within a program T or F?

A

False

31
Q

The primary application for helical interpolation is to Mill threads. T or F?

A

True

32
Q

The key to successful threadmill programming is matching the Z-axis departure in each helical motion to the portion of a full circle being Machined by the command. T or F?

A

True

33
Q

What can you use cutter compensation with helical interpolation for?

A

Trial Machining and sizing

Machinist Period 4 2019 Cash (24 decks)

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