CNC machine PROGRAM

Quiz I Open-book Portion Name________________________

ENGT 3200

2018 DOSBOX VERSION

Grading: The Closed Book Portion of the Quiz [which is valued at 100 Points] will be lumped with this which is valued at [100 Points] for a total score of 200 Points which will be put in the spread sheet for and adjusted for the value for Quiz I in the Syllabus.

EMCOBCX Programming

The following engineering drawing will help with your CNC programming:

The name we will add later and has nothing to do with the programming.

Programming the part-

· Let’s assume that the wax you were given is 3.040 as an as cut length. Your touch off in EMCO SPEAK will be X1500 Z20. In other words you are 20 [.020] off of the end of the part. You will face off 40 [.040] using a facing cycle. The part will now be 3.000 long.

· Efficiently program the lathe to turn the Ø1.000, Ø.750, and Ø.500 sections. Use a turning cycle for each of these sections. The original diameter of the WAX was Ø1.320.

· Including your face off, the part will be 3.000 inches long and each of the turned down areas will be the correct length.

· Include a safety line at the end.

· End the program with an M30 and END as we usually do.

EXERCISES

OPEN BOOK QUIZ Triple_Turn_Face

1. Attach a screen clip of your part with your name on it like the following. You can probably wrap .100 inch embossed letters that are centered on the part. I used 3/16” Lettering. You can use a helper to wrap these. You may remove my examples and replace them with your screen clips.

[20 Points]

2. Generate a 2 view engineering drawing of this part and attach it to this write up. Use the Waggoner Engineering standards we have used so far in class. Here are some details we need to include:

· English “inch” units – 3 Decimal places.

· Title: TRIPLE_TURN_FACE

· Tolerance: + .001

· DWG NO: 900-90-9000

· Use Waggoner Drawing Standards – All Capital Letters…

· Make sure you detail the TEXT on your drawing giving complete information on how to make it.

[30 Points]

3. Paste as screen clip of your simulation [the Turquoise – similar to the one seen below] graphics of the part being cut on the lathe.

4. Attach a listing of your code here.

" 92"," 1500"," 20"," "," "

"M03"," "," "," "," "

" 00"," 1320"," 20"," "," "

" 88"," -10"," -40"," 20"," 10"

" 00"," 1320"," 20"," "," "

" 84"," 1000"," -1040"," 20"," 20"

" 00"," 1320"," 20"," "," "

" 00"," 1320"," 00"," "," "

" 84"," 750"," -640"," 20"," 20"

" 84"," 500"," -415"," 20"," 20"

" 00"," 1500"," 20"," "," "

"M30"," "," "," "," "

"END","END","END","END","END"

5. Re-paste your CNC code and create a “walk through” of the G and M (or EIA) codes to the report as in the following:

" 92"," 1500"," 20"," "," "

"M30"," "," "," "," "

"END","END","END","END","END"

[20 Points]

6. Let’s look at some G and M codes. Use the Internet to get a description of the following making sure you attach the web site at the end of each item’s description. Include screen clips if they are available:

a. M03

Turn spindle on in clockwise direction

b. M06

Tool change stop program and call tool change

What did Dr. Waggoner say about the M06 and our CNC5 lathe?

c. M05

Stop spindle

d. G90

ABOSLUTE POSITION

e. G91

Incremental position

[d. and e. refer to absolute and incremental co-ordinates].

[20 Points]

7. After reviewing the Internet and including references, explain a place or example where incremental coordinates would be helpful.

[10 Points]

7