MT 211L Lab 10: Word Address Programming

MT 211L Lab 10: Word Address Programming Page 1 of 5

Laboratory Goals

 Manual Entering of G-code Programs  Enter and Investigate Simple G-code Program  Investigate ALL Milling Machine G and M codes  Correlate G and M Code Characteristics  Final Exam  Post-Lab Assignments o Develop CNC Milling Machine Projects to Support SIPI Research

Pre-lab / lab reading

 Read through Chapter 10 and Appendix B

Equipment needed

 Computer with network access  Boxford Software

Parts needed

 none

Lab safety concerns

 none MT 211L Lab 10: Word Address Programming Page 2 of 5

1. Manually Entering G-code Programs

Thus far we have relied upon the automated features of BobCad/Cam and Boxford CAM software. However, there are times when G-code has to be developed and modified to accomplish unusual tasks that the automated tools can neither detect nor compensate.

 Open Boxford CAD/CAM Application  Select 190VMCxi  On the MENU bar select , ,  It will ask for a Password, leave it blank, select  The G&M top icon is now active and can be pressed to generate G-code manually  Select the G&M top icon  Material Type: select  Workpiece dimensions: X<75>, Y<75>, Z<25)  Metric: checked  Notice the arrows to the right of “Metric”, this allows for other shapes of billet   You can now enter G and M codes manually and simulate your program  Pressing the Play button runs the entire program  Chapter 10 discussed how to use Word Address Programming (G&M codes) MT 211L Lab 10: Word Address Programming Page 3 of 5

2. Your First G-code Program

 Use the CNC Programming Worksheet for manually writing your program  You can then transfer it into the Boxford G&M software to simulate your toolpath  A blank CNC Programming Worksheet can be found at http://xxx  Your first sample code is located at: http://xxx

Drg No. PROGRAMMING SHEET MATERIAL: TITLE: WRITTEN BY SHEET No. OF

Line Prep Misc Feed Spindle Tool Number Code Code Axis Coordinates Rate Speed No. Description N G M X Y Z I J K F S P Q R T

Metric 10 21

Tool Change 20 6 1

Rapid Position 30 0 0.000 0.000 30.000

Spindle CW 40 3 3500

Rapid Position 50 0 10.000 70.000 2.000

Linear Interpolation 60 1 (1.000) 150

Linear Interpolation 70 1 40.000 300

Rapid Position 80 0 30.000

Rapid Position 90 0 0.000 0.000

Spindle Off 100 5 Program Stop and Tool Change 110 30

 Using the tables on pages 208 through 211 o In English sentences, write what is happening in the above CNC Programming Worksheet  Enter this program into the Boxford Software as G&M code  Run the simulation o Does the resulting tool simulation react the same way your English version described?  Notice there are no Absolute or Incremental Coordinate codes used o Why? o Don’t stop now, you’ve been working as a team the entire semester. . Form up 10 minute task groups and find out why  3-person teams o text book o internet o Boxford Manuals o Document the results in your PMB under Project 10 (Lab 10) MT 211L Lab 10: Word Address Programming Page 4 of 5  What value would you need to change to extend the tool cut 10 mm to the right?  How does the program know what tool to use to get the desired cut width?  If during the running of your program you hit “Cycle Stop”, what happens to the reset of the program if you hit “Cycle Start” next?

3. G and M code Exercises

As 3-person teams:

Within the laboratory time allowed  research each G and M codes sequentially (see Appendix B)  develop a CNC Programming Sheet to exercise the code being investigated  use any available resources for learning to use each G and M code o Document where the information came from in your PMB  enter your code into any one of the Boxford Workstation software applications o All of the workstations have the identical software o If you have developed an understanding as to how to enter G&M codes using BobCad/Cam software, your team can work on any of the BobCad/Cam workstations to complete these projects  Write in English sentences how to implement each of the code combinations, and anything of special interest  Enter ALL of the above information into your PMB under Project 10 (Lab 10)

4. G and M code Correlations

On the whiteboard:

 Write G-code 01 all the unique information developed by all of the teams  Continue the above exercise with every G and M code  Teams Rule o Why didn’t everyone get the same information? o How is it that a team effort produced more information? . List all the different ways in which information was found

5. Final Exam

During the last hour of the Laboratory, administer the Final Examination MT 211L Lab 10: Word Address Programming Page 5 of 5

6. Post Laboratory Assignments

What would you recommend for improving this laboratory experience? o Enter your comments at: http://xxx

 Develop projects to be milled on the milling machine to support SIPI research projects. o If additional labs are authorized, use the Team concepts to develop and manufacture those projects (don’t forget to maintain your PMB).  Obtain and read through the MT-212L labs o As a team, prepare the PMB for those laboratories o Share your developments o As much as practical, prepare for your MT-212L labs