Which of the following indicates normal spindle rotation: A. M01 B. M02 C. M03 D

Question

Which of the following indicates normal spindle rotation: A. M01 B. M02 C. M03 D. M04 E. None of the above Which of the following indicates a fixed cycle cancel: A. G40 B. G80 C. M40 D. M80 E. M43 19. Which of the following always requires a decimal point: A. Spindle speed B. All X, Y, and Z coordinate data C. Feed rate D. Both B and C E. All of the above According to the text author, codes that specify the mode in which a CNC machine moves along its programmed axis are: A. Miscellaneous machine functions (M codes) B. Comments C. Preparatory functions (G codes) D. Tool length offsets (H codes) E. Dimension words The work coordinate system selections range from: A. M51 through M56 B. M52 through M57 C. M53 through M58 D. M54 through M59 E. None of the above The second block of mill programs in this course always reads: A. G91 G30 Y0; B. G28 G90 M33; C. G0 G40 G80 G90; D. G1 G30 G80 G91; E. G28 Z3. M9 G40 G80;

Explanation / Answer

Question 17:

The answer is option C : M03 because it only turns the spindle in clockwise direction.

Question 18:

The answer is option B : G80 because canned cycle is called fixed cycle which can be cancelled using G80.

Question 19:

The answer is option B : ALL X, Y, Z CO-ORDINATE,

In some cases certain coordinates in the files will not have a decimal point. However,by default, Haas machines (and lot of other CNC’s, but not the Tormach) do something unexpected in the absence of decimal point–they divide the number by 10,000! simply, they assume that “Y5” and “Y0.0005” are same. Just think how crazy will it be. So the co-ordinates always require decimal point.

Question 20:

The answer is Option c : Preparatory Function (G Codes)

It provides the code in which machine will move along its programmed axex

Question 21:

The answer is option E : None of the above

Work coordinate system ranges from G54-G59.

Question 22:

********************Mill program of the course not included hence unable to answer this question***************

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