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New to CAD Models

WhiteRabbit
Good Morning! I'm new to using CAD models. I only used them in class. I created a manual plane, line, point alignment to make the model aligned with the machine. The problem I'm having is when I change my alignment or workplane, my points are no longer aligned with my model. They are offset and mess up my dimensions. Do I need to continually redo the manual alignment to keep everything where it should be or am I missing something else? Thanks in advance!
Parents
  • We'll get to the bottom of this. To set up auto cal commands successfully, one must do the following:

    0.5) Have a SET position for your sphere to be screwed into
    1) Create the PARAMETER SET for your MASTER PROBE. This "PS" should be T1A0B0 only.
    2) Create the PS for your SLAVE probe angles. I do this by clicking MARK ALL, then hold "CTRL" and click T1A0B0 to "un-select" it. Now, make these tip angles a PS.

    For both parameter sets, DCC + DCC should be checked off.

    3) Put the auto-calibration commands in your program. They'll be "blank" when you first insert them. You want to get them into your edit window, we'll then F9 them to add stuff to them.

    ** Steps 4 and 5 are the most important part,, probably where you got tripped up

    4) F9 the first auto-cal command. Select Your MASTER PS from the drop-down menu. MAKE SURE YOU SELECT "YES" FOR THE QUAL TOOL MOVED."
    5) F9 the second auto-cal command. Select Your SLAVE PS from the drop-down menu. MAKE SURE YOU SELECT "NO" FOR THE QUAL TOOL MOVED."

    Selecting YES above tells PC DMIS that this "set" is your MASTER. Selecting NO to the subsequent sets will make PC DMIS view those as the slave files that are relative to the master.

    The code is now done, but you're not home free just yet. To make all of the above work, you WILL have to longhand calibrate T1AB0 ONE TIME (calibrating by F9-ing into probe menu and clicking T1A0B0 and saying YES sphere has moved) to tell PC DMIS where it is. Once that finishes, PC DMIS now knows where the sphere is. NOW, you'll be able to run your auto-calibration commands and the machine will do everything automatically for you.

    Below is how I handle auto-cal commands. I put them in a group at the beginning of every program and handle it with a YES/NO question and some case & IF statements: 

    GROUP_PROBEQUAL_FLOWCOMMANDS=GROUP/SHOWALLPARAMS=YES
QUAL_QUESTION =COMMENT/YESNO,NO,FULL SCREEN=NO,AUTO-CONTINUE=NO,
Has the CMM been calibrated??
IF_GOTO/QUAL_QUESTION.INPUT=="YES",GOTO = LABEL_END_CALGROUP
QUAL_ACTION =COMMENT/INPUT,NO,FULL SCREEN=NO,
1--> Let's calibrate the CMM now.

2--> Just run the program. I
don't need to calibrate.

3--> I need help.

IF_GOTO/LEN(QUAL_ACTION.INPUT)<>1,GOTO = QUAL_ACTION
ASSIGN/VAR_1=ARRAY(1,2,3)
ASSIGN/VAR_2=MIN(ABS(VAR_1-QUAL_ACTION.INPUT))
IF_GOTO/VAR_2<>0,GOTO = QUAL_ACTION
SELECT/QUAL_ACTION.INPUT
CASE/1
CHECK/0.25,1
DISPLAYPRECISION/7
COMMENT/OPER,NO,FULL SCREEN=NO,AUTO-CONTINUE=NO,
Ensure sphere is in calibration hole.

Remove cap from sphere.

Press OK to continue.
AUTOCALIBRATE/PROBE, PARAMETER_SET=T1A0B0_MSTR, QUALTOOL_MOVED=YES_DCC,
CHECK COLLISION=NO, SHOW_SUMMARY=NO, OVERWRITE_RESULTSFILE=NO
AUTOCALIBRATE/PROBE, PARAMETER_SET=UT626_SLVS, QUALTOOL_MOVED=NO,
CHECK COLLISION=NO, SHOW_SUMMARY=NO, OVERWRITE_RESULTSFILE=NO
COMMENT/OPER,NO,FULL SCREEN=NO,AUTO-CONTINUE=NO,
Put cap back on sphere.

Press OK to continue.
DISPLAYPRECISION/4
GOTO/TERMINUS
END_CASE/
CASE/2
COMMENT/REPT,

CMM Operator states that CMM is not calibrated and has decided to use it anyway,.
GOTO/LABEL_END_CALGROUP
END_CASE/
CASE/3
GOTO/TERMINUS
END_CASE/
END_SELECT/
CHECK/0.1,1
LABEL_END_CALGROUP =LABEL/
ENDPRG =LABEL/
ENDGROUP/ID=GROUP_PROBEQUAL_FLOWCOMMANDS



Reply
  • We'll get to the bottom of this. To set up auto cal commands successfully, one must do the following:

    0.5) Have a SET position for your sphere to be screwed into
    1) Create the PARAMETER SET for your MASTER PROBE. This "PS" should be T1A0B0 only.
    2) Create the PS for your SLAVE probe angles. I do this by clicking MARK ALL, then hold "CTRL" and click T1A0B0 to "un-select" it. Now, make these tip angles a PS.

    For both parameter sets, DCC + DCC should be checked off.

    3) Put the auto-calibration commands in your program. They'll be "blank" when you first insert them. You want to get them into your edit window, we'll then F9 them to add stuff to them.

    ** Steps 4 and 5 are the most important part,, probably where you got tripped up

    4) F9 the first auto-cal command. Select Your MASTER PS from the drop-down menu. MAKE SURE YOU SELECT "YES" FOR THE QUAL TOOL MOVED."
    5) F9 the second auto-cal command. Select Your SLAVE PS from the drop-down menu. MAKE SURE YOU SELECT "NO" FOR THE QUAL TOOL MOVED."

    Selecting YES above tells PC DMIS that this "set" is your MASTER. Selecting NO to the subsequent sets will make PC DMIS view those as the slave files that are relative to the master.

    The code is now done, but you're not home free just yet. To make all of the above work, you WILL have to longhand calibrate T1AB0 ONE TIME (calibrating by F9-ing into probe menu and clicking T1A0B0 and saying YES sphere has moved) to tell PC DMIS where it is. Once that finishes, PC DMIS now knows where the sphere is. NOW, you'll be able to run your auto-calibration commands and the machine will do everything automatically for you.

    Below is how I handle auto-cal commands. I put them in a group at the beginning of every program and handle it with a YES/NO question and some case & IF statements: 

    GROUP_PROBEQUAL_FLOWCOMMANDS=GROUP/SHOWALLPARAMS=YES
QUAL_QUESTION =COMMENT/YESNO,NO,FULL SCREEN=NO,AUTO-CONTINUE=NO,
Has the CMM been calibrated??
IF_GOTO/QUAL_QUESTION.INPUT=="YES",GOTO = LABEL_END_CALGROUP
QUAL_ACTION =COMMENT/INPUT,NO,FULL SCREEN=NO,
1--> Let's calibrate the CMM now.

2--> Just run the program. I
don't need to calibrate.

3--> I need help.

IF_GOTO/LEN(QUAL_ACTION.INPUT)<>1,GOTO = QUAL_ACTION
ASSIGN/VAR_1=ARRAY(1,2,3)
ASSIGN/VAR_2=MIN(ABS(VAR_1-QUAL_ACTION.INPUT))
IF_GOTO/VAR_2<>0,GOTO = QUAL_ACTION
SELECT/QUAL_ACTION.INPUT
CASE/1
CHECK/0.25,1
DISPLAYPRECISION/7
COMMENT/OPER,NO,FULL SCREEN=NO,AUTO-CONTINUE=NO,
Ensure sphere is in calibration hole.

Remove cap from sphere.

Press OK to continue.
AUTOCALIBRATE/PROBE, PARAMETER_SET=T1A0B0_MSTR, QUALTOOL_MOVED=YES_DCC,
CHECK COLLISION=NO, SHOW_SUMMARY=NO, OVERWRITE_RESULTSFILE=NO
AUTOCALIBRATE/PROBE, PARAMETER_SET=UT626_SLVS, QUALTOOL_MOVED=NO,
CHECK COLLISION=NO, SHOW_SUMMARY=NO, OVERWRITE_RESULTSFILE=NO
COMMENT/OPER,NO,FULL SCREEN=NO,AUTO-CONTINUE=NO,
Put cap back on sphere.

Press OK to continue.
DISPLAYPRECISION/4
GOTO/TERMINUS
END_CASE/
CASE/2
COMMENT/REPT,

CMM Operator states that CMM is not calibrated and has decided to use it anyway,.
GOTO/LABEL_END_CALGROUP
END_CASE/
CASE/3
GOTO/TERMINUS
END_CASE/
END_SELECT/
CHECK/0.1,1
LABEL_END_CALGROUP =LABEL/
ENDPRG =LABEL/
ENDGROUP/ID=GROUP_PROBEQUAL_FLOWCOMMANDS



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