Fixture and import model

**Roberto** · 04-07-2008, 05:19 PM

Originally posted by scharsch View Post

Hi,
I'm getting a little ahead of myself but I plan on making a fixture up to hold my part/s. I plan on using flow control to measure multiple parts in the fixture.

My question is how do you use the fixture in conjunction with importing a model? I'm not sure how I align with the fixture then go to my imported part to start taking measurements.

Hopefully above is clear, if not let me know, I'll try explaining better, lol.

Thanks

You can complete all your offline programming with the cads first.
Then, you can make separate programs for fixture(s) and save external alignment. Finally, recall such aln. into part programs as needed.

As you mentioned above, multiple parts using same fixture.

**Paul Sarrach** · 04-07-2008, 05:53 PM

Where are you located at? I am in the Metal Stamping field, you are too, or Plastices. Its a piece of cake, but it is kinda hard to desribe in this type fomat. If you like I can talk you thru it over the phone. PM and I we can switch numbers.

**homburgler** · 04-08-2008, 10:25 AM

Originally posted by Roberto View Post

You can complete all your offline programming with the cads first.
Then, you can make separate programs for fixture(s) and save external alignment. Finally, recall such aln. into part programs as needed.

As you mentioned above, multiple parts using same fixture.

Let me muddy the waters a bit. I have always been told that you NEVER insert an alignment after you've programmed something. Are my mentors wrong or overly careful?

**Paul Sarrach** · 04-08-2008, 11:28 AM

Originally posted by homburgler View Post

Let me muddy the waters a bit. I have always been told that you NEVER insert an alignment after you've programmed something. Are my mentors wrong or overly careful?

Overly careful. I do it all the time. You need to be careful, and you need to recall the old alingment to continue. It will update if you wish, just always save a copy. If you need more detail I can elaborate,

**jkb_mcg** · 04-08-2008, 10:00 PM

Originally posted by Paul Sarrach View Post

Overly careful. I do it all the time. You need to be careful, and you need to recall the old alingment to continue. It will update if you wish, just always save a copy. If you need more detail I can elaborate,

Yes...please elaborate!

**Willy T** · 04-09-2008, 07:31 AM

I'm quite interested in this as well.

I've got a fixture that 99% of our parts go on. Using MeasMax, we just moved to "Park X,Y,Z" and then used an incremental move to the same "start" position to begin a temp alignment.

I've looked all through the PCDMIS help screens & search topics & can't find a 'PARK' code to move the CMM to the soft limit. I figured I could program using this same method, but it looks like I'll have to teach the fixture. Does PC_DMIS have a code that will move the CMM to a PARK position?

**Matthew D. Hoedeman** · 04-09-2008, 07:35 AM

Well, if you recall the 'default' alignment (the machine co-ordinate alignment, STARTUP), XYZ zero will be the home position of the machine.

**wiseman** · 04-09-2008, 08:32 AM

I always use the same fixture for all my programs and almost always program offline. I assemble the CAD model into the fixture in Pro-E, while in pro-e I put an alignment on the front corner of the fixture. I then import the model into pcdmis as an iges file and do a manual alignment on the front corner of the fixture at the beginning of my program. When I go to run my program on the cmm I only have to touch off the fixture one time, since my fixture stays bolted down to the granite table. I like having the fixture and the part together as one model so I can run collision detection.

**scharsch** · 04-10-2008, 08:40 AM

Thanks everyone,

I aligned my fixture, a flat magnetic plate, and saved the alignment.
I recalled the saved alignment into an existing program .

Now what am I supposed to do? Code below.
STARTUP =ALIGNMENT/START,RECALL:,LIST=YES
ALIGNMENT/END
MODE/MANUAL
FORMAT/TEXT,OPTIONS, ,HEADINGS,SYMBOLS, ;NOM,TOL,MEAS,DEV,OUTTOL, ,

LOADPROBE/STATION5
TIP/T1A0B0, SHANKIJK=0.001, -0.001, 1, ANGLE=-0.609
RECALL/ALIGNMENT,EXTERNAL,daln_abc,MAGFIX:daln_abc
PLN1 =FEAT/PLANE,CARTESIAN,TRIANGLE
THEO/<0.116,0.352,0>,<0,0,-1>
ACTL/<27.05,23.947,30.022>,<0.0127877,-0.0043741,0.9999087>
MEAS/PLANE,3
HIT/BASIC,NORMAL,<19.409,11.614,0>,<0.0000004,-0.0000002,-1>,<25.401,46.648,30.142>,USE THEO = YES
HIT/BASIC,NORMAL,<-18.819,12.017,0>,<0.0000004,-0.0000002,-1>,<9.109,11.795,30.198>,USE THEO = YES
HIT/BASIC,NORMAL,<-0.246,-22.572,0>,<0.0000004,-0.0000002,-1>,<46.639,13.398,29.725>,USE THEO = YES
ENDMEAS/
MALN_A =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
ALIGNMENT/LEVEL,ZMINUS,PLN1
ALIGNMENT/END
CIR1 =FEAT/CIRCLE,CARTESIAN,IN,LEAST_SQR
THEO/<0,0,1.343>,<0,0,1>,40.621
ACTL/<264.582,-240.745,603.52>,<0,0,1>,40.623
MEAS/CIRCLE,3,WORKPLANE
HIT/BASIC,NORMAL,<-0.236,-20.309,1.271>,<0.0109518,0.99994,0>,<279.683,-227.16,603.32>,USE THEO = YES
HIT/BASIC,NORMAL,<-16.062,11.766,1.332>,<0.7680246,-0.6404203,0>,<248.576,-228.24,603.677>,USE THEO = YES
HIT/BASIC,NORMAL,<14.577,13.606,1.423>,<-0.7710666,-0.6367545,0>,<264.638,-261.056,603.565>,USE THEO = YES
ENDMEAS/
MOVE/POINT,NORMAL,<-3.261,-27.758,-14.931>
TIP/T1A90B180, SHANKIJK=0.011, 1, 0.001, ANGLE=0.084
LIN1 =FEAT/LINE,CARTESIAN,UNBOUNDED
THEO/<10.06,23.036,25.61>,<0.0000559,-1,0>
ACTL/<274.681,-219.254,627.033>,<0.1321449,-0.9912304,0>
MEAS/LINE,2,WORKPLANE
HIT/BASIC,NORMAL,<10.03,22.686,25.608>,<-0.9982739,0.0587306,0>,<274.681,-219.254,627.027>,USE THEO = YES
HIT/BASIC,NORMAL,<9.886,20.244,25.604>,<-0.9982739,0.0587306,0>,<275.229,-223.367,627.038>,USE THEO = YES
ENDMEAS/
MALN_ABC =ALIGNMENT/START,RECALL:MALN_A,LIST=YES
ALIGNMENT/LEVEL,ZMINUS,PLN1
ALIGNMENT/ROTATE,YMINUS,TO,LIN1,ABOUT,ZMINUS
ALIGNMENT/TRANS,XAXIS,CIR1
ALIGNMENT/TRANS,YAXIS,CIR1
ALIGNMENT/TRANS,ZAXIS,PLN1
ALIGNMENT/END
COMMENT/OPER,NO,DCC MODE
MODE/DCC
MOVE/POINT,NORMAL,<7.474,37.981,25.929>
MOVE/POINT,NORMAL,<7.172,38.149,-143.338>
TIP/T1A0B0, SHANKIJK=-0.001, 0.001, -1, ANGLE=-179.391
MOVE/POINT,NORMAL,<14.265,21.047,-13.01>
TOP_PLN2 =FEAT/CONTACT/PLANE,CARTESIAN,TRIANGLE
THEO/<0,0,0>,<0,0,-1>
ACTL/<0.032,0.012,-0.145>,<-0.0123207,-0.0036648,-0.9999174>
TARG/<0,0,0>,<0,0,-1>
ANGLE VEC=<-1,0,0>,SQUARE
SHOW ADVANCED MEASUREMENT OPTIONS=YES
VOID DETECTION=NO
SURFACE=THEO_THICKNESS,0
MEASURE MODE=NOMINALS
RMEAS=NONE,NONE,NONE
AUTO WRIST=NO
CLEARPLANE=NO
GRAPHICAL ANALYSIS=NO
SCREEN CAPTURE=NO
FEATURE LOCATOR=NO,NO,""
SHOW_CONTACT_PARAMETERS=YES
NUMHITS=2,NUMROWS=2
SPACER=32
AVOIDANCE MOVE=BOTH,DISTANCE=5.21
SHOWHITS=NO
DALN_A =ALIGNMENT/START,RECALL:MALN_ABC,LIST=YES
ALIGNMENT/LEVEL,ZMINUS,TOP_PLN2
ALIGNMENT/END
40.64ID_CIR2=FEAT/CONTACT/CIRCLE,CARTESIAN,IN,LEAST_SQR
THEO/<0,0,0>,<0,0,-1>,40.64,0,299.4
ACTL/<-0.053,-0.007,0>,<0,0,-1>,40.624,0,299.4
TARG/<0,0,0>,<0,0,-1>
ANGLE VEC=<-1,-0.0000452,0>
DIRECTION=CCW
SHOW ADVANCED MEASUREMENT OPTIONS=YES
VOID DETECTION=NO
REMEASURE=NO
SURFACE=THEO_THICKNESS,0
MEASURE MODE=NOMINALS
RMEAS=NONE,NONE,NONE
AUTO WRIST=NO
CIRCULAR MOVES=NO
CLEARPLANE=NO
GRAPHICAL ANALYSIS=NO
SCREEN CAPTURE=NO
FEATURE LOCATOR=NO,NO,""
SHOW_CONTACT_PARAMETERS=YES
NUMHITS=6,DEPTH=1.25,PITCH=0
SAMPLE HITS=0,SPACER=2
AVOIDANCE MOVE=BOTH,DISTANCE=5.21
FIND HOLE=DISABLED,ONERROR=YES,READ POS=NO
SHOWHITS=NO
TIP/T1A90B180, SHANKIJK=0.011, 1, 0.001, ANGLE=0.062
MOVE/POINT,NORMAL,<2.82,39.376,10.157>
MOVE/POINT,NORMAL,<2.927,38.95,22.439>
20_LIN1 =FEAT/CONTACT/LINE,CARTESIAN
THEO/<9.999,22.5,27.073>,<9.999,19.349,27.073>,<0,-1,0>,<-1,-0.0000452,0>,<0,0,1>,3.151
ACTL/<9.999,22.5,26.823>,<9.999,19.349,26.823>,<0,-1,0>,<-1,-0.0000452,0>,<0,0,1>,3.151
TARG/<9.999,22.5,27.073>,<9.999,19.349,27.073>,<0,-1,0>,<-1,-0.0000452,0>,<0,0,1>
BOUNDED
SHOW ADVANCED MEASUREMENT OPTIONS=YES
VOID DETECTION=NO
SURFACE1=THEO_THICKNESS,0
SURFACE2=THEO_THICKNESS,0
MEASURE MODE=NOMINALS
RMEAS=NONE,NONE,NONE
AUTO WRIST=NO
CLEARPLANE=NO
GRAPHICAL ANALYSIS=NO
SCREEN CAPTURE=NO
FEATURE LOCATOR=NO,NO,""
SHOW_CONTACT_PARAMETERS=YES
NUMHITS=2,DEPTH=0.25
AVOIDANCE MOVE=BOTH,DISTANCE=5.21
SHOWHITS=NO
DALN_ABC =ALIGNMENT/START,RECALL

ALN_A,LIST=YES
ALIGNMENT/LEVEL,ZMINUS,TOP_PLN2
ALIGNMENT/ROTATE,YMINUS,TO,20_LIN1,ABOUT,ZMINUS
ALIGNMENT/TRANS,XAXIS,40.64ID_CIR2
ALIGNMENT/TRANS,YAXIS,40.64ID_CIR2
ALIGNMENT/TRANS,ZAXIS,TOP_PLN2
ALIGNMENT/END

**scharsch** · 04-11-2008, 09:59 AM

Hi All,
I must be missing something about importing alignment.
I've imported the alignment and it doesn't seem to do anything for me.
I'm sure I'm missing something major just can't see it.

Appreciate help

Fixture and import model

Fixture and import model

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