Multi-axis Milling 150401h

Question 1

What’s the difference between the rotary device for a vertical Machining Center versus a horizontal Machining Center?

Answer 1

Rotary device is mounted on top of the table. Horizontal, it’s built into the table and rotates table by itself

Question 2

Name two types of rotary devices

Answer 2

Indexer and rotary axis

Question 3

Explain the difference between an indexer and a rotary axis

AIT

Answer 3

Related to whether or not Machining can occur during rotation.
Indexer, doesn’t allow Machining.
Rotary, allows Machining during rotation

Question 4

How many rotary axes are there on a 4 axes machine Center?

Answer 4

1 rotary 3 linear

Question 5

List three applications for rotary axes

Answer 5

Perform and rotate Machining Ops
Perform Machining Ops, usually Milling, while rotating
Maintain perpendicularity of the cutting tool to the work surface

Question 6

How are rotary axes named?

Answer 6

X is A
Y is B
Z is C

Question 7

What letter address is used for the rotary axis on a horizontal Machining Center?

Answer 7

B

Question 8

What is the resolution of a rotary axis?

Answer 8

.001 degree

Question 9

What format is used to specify rotation of the rotary axis? Degrees, minutes and seconds or decimal format?

Answer 9

Decimal format

Question 10

Convert 15 degrees 17 minutes 36 seconds to decimal degrees

Answer 10

15 plus 17 / 60 plus 36 / 3600 = 15.2933333 degrees

Question 11

Where are program zero assignment values specified from when using a rotary axis?

Answer 11

From the rotary axis zero return position

Question 12

What direction will the B axis on a horizontal Machining Center rotate during positive and negative commands as viewed from above the axis?

Answer 12

Counterclockwise is negative, clockwise is positive

Question 13

What letter address is used when quickly positioning a rotary axis prior to a machining operation?

Answer 13

G00 rapid

Question 14

How can you provide for more stable Machining on the rotary axis?

Answer 14

Clamping

Question 15

If the operator wants to have a common zero return position and program zero point what value has to be placed in the rotary axis fixture offset register?

Answer 15

The angular distance from the rotary axis zero return position to the program zero angular position

Question 16

When using absolute positioning does the rotary axis distinguish 0 degrees, 360 Degrees, 720 degrees, and 1080 degrees as the same rotary axis position?

Answer 16

No

Question 17

During the rotary axis Machining motion you must specify feed rate in…

AIT

Answer 17

Degrees per minute or inches per minute as per AIT

Question 18

From a programmer standpoint, when using a 4th axis, what is easiest way to handle multiple sides being machined?

Answer 18

Assigning one program zero point per side

Question 19

When using one Central program zero point on a vertical Machining centre with the 4th axis mounted parallel to the x-axis, where is program zero located?

Answer 19

You choose one Central program zero point location, and all coordinates for all sides are specified from this point hey sweetie

Question 20

What can lead to premature failure when powerful Machining on a rotary axis?

Answer 20

Forgetting to clamp

Question 21

Incremental positioning is often better than absolute positioning for rotary axes when using them as indexers? T or F?

Answer 21

True