Program without a model or a part?

So we have a part that's due out Tuesday I believe. My supervisor (who's a machinist, not a CMM operator) wants me to start writing a program so I can check it as soon as it's done so he can immediately ship it out. The problem is, I don't have a model and he says there isn't time to get one from the customer and that I don't need one anyway because the previous inspector wrote programs without models. As far as I know though, he was given an actual part. I don't know how I'm supposed to write a routine if I have nothing to probe. I know I can create auto features with keyed-in nominals after my alignment, but what do I align to if I don't have anything? Where's my origin coming from? Am I being too needy by asking for either a part or a model?

Parents

0 Neil Challinor 7 months ago

Like Henniger123 said, you do not need a part or a CAD model to be able to program offline, all you need is the drawing. It will not be as quick or easy as programming from a part or a model but it is perfectly possible. You just need to create features with nominals that match the values shown on your drawing. The difficult thing being able to visualise everything in 3D in your head.

Using the Hexblock drawing which can be found in the training folder (C:\Users\Public\Documents\Hexagon\PC-DMIS\version\Training in recent versions, C:\Program Files\Hexagon\version\Training"in older versions) as an example, I would start by creating measured features for my manual alignment. For that part, a plane, line point alignment is sufficient. The plane would be the top face of the block, the line would run along the front edge and the point would be on the left edge. I always use measured features for my manual alignment and then a mixture of auto and measured features for the rest of the routine (depending on which is easiest - manual features are easier if you want specific control over where the hits are taken). Here's some example code that does the manual and DCC alignments and then measures the centre bore in the top face...

PART NAME  : OFFLINE_NO_PART_NO_CAD
REV NUMBER : 
SER NUMBER : 
STATS COUNT : 1
GD&T STANDARD : ASME Y14.5 - 2009/2018
 
STARTUP    =ALIGNMENT/START,RECALL:USE_PART_SETUP,LIST=YES
            ALIGNMENT/END
            MODE/MANUAL
            FORMAT/TEXT,OPTIONS, ,HEADINGS,SYMBOLS, ;NOM,TOL,MEAS,DEV,OUTTOL, , 
            LOADPROBE/3BY20
            TIP/T1A0B0, SHANKIJK=0, 0, 1, ANGLE=0
PLN1       =FEAT/PLANE,CARTESIAN,TRIANGLE
            THEO/<50,35,0>,<0,0,1>
            ACTL/<0,0,0>,<0,0,1>
            MEAS/PLANE,3
              HIT/BASIC,NORMAL,<5,45,0>,<0,0,1>,<0,0,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<65,55,0>,<0,0,1>,<0,0,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<80,5,0>,<0,0,1>,<0,0,0>,USE THEO=YES
            ENDMEAS/
A1         =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN1
              ALIGNMENT/TRANS,ZAXIS,PLN1
            ALIGNMENT/END
LIN1       =FEAT/LINE,CARTESIAN,UNBOUNDED
            THEO/<5,0,0>,<1,0,0>
            ACTL/<5,0,0>,<1,0,0>
            MEAS/LINE,2,ZPLUS
              HIT/BASIC,NORMAL,<5,0,0>,<0,-1,0>,<5,3,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<75,0,0>,<0,-1,0>,<55,3,0>,USE THEO=YES
            ENDMEAS/
A2         =ALIGNMENT/START,RECALL:A1,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN1
              ALIGNMENT/ROTATE,XPLUS,TO,LIN1,ABOUT,ZPLUS
              ALIGNMENT/TRANS,YAXIS,LIN1
              ALIGNMENT/TRANS,ZAXIS,PLN1
            ALIGNMENT/END
PNT1       =FEAT/POINT,CARTESIAN
            THEO/<0,5,0>,<-1,0,0>
            ACTL/<0,0,0>,<0,0,1>
            MEAS/POINT,1,WORKPLANE
              HIT/BASIC,NORMAL,<0,5,0>,<-1,0,0>,<0,0,0>,USE THEO=YES
            ENDMEAS/
A3         =ALIGNMENT/START,RECALL:A2,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN1
              ALIGNMENT/ROTATE,XPLUS,TO,LIN1,ABOUT,ZPLUS
              ALIGNMENT/TRANS,XAXIS,PNT1
              ALIGNMENT/TRANS,YAXIS,LIN1
              ALIGNMENT/TRANS,ZAXIS,PLN1
            ALIGNMENT/END
            COMMENT/OPER,NO,FULL SCREEN=NO,AUTO-CONTINUE=NO,OVC=NO,
            Manual Alignment Complete.  Switching to DCC
            Machine will move when you click OK.
            MODE/DCC
            CLEARP/ZPLUS,10,ZPLUS,0,ON
            MOVE/CLEARPLANE
PLN2       =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,TRIANGLE,LEAST_SQR
            THEO/<40,30,0>,<0,0,1>
            ACTL/<40,30,0>,<0,0,1>
            TARG/<40,30,0>,<0,0,1>
            ANGLE VEC=<0.9238795,0.3826834,0>,RADIAL
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              NUMHITS=8,NUMROWS=1
              SPACER=16
              AVOIDANCE MOVE=BOTH,DISTANCE BEFORE=10,DISTANCE AFTER=10,DIRECTION=ALONG FEATURE VECTOR
              USE BOUNDARY OFFSET=NO
            SHOW HITS=NO
A4         =ALIGNMENT/START,RECALL:A3,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN2
              ALIGNMENT/ROTATE,XPLUS,TO,LIN1,ABOUT,ZPLUS
              ALIGNMENT/TRANS,XAXIS,PNT1
              ALIGNMENT/TRANS,YAXIS,LIN1
              ALIGNMENT/TRANS,ZAXIS,PLN2
            ALIGNMENT/END
            MOVE/CLEARPLANE
LIN2       =FEAT/CONTACT/LINE/DEFAULT,CARTESIAN,BOUNDED
            THEO/<5,0,0>,<80,0,0>,<1,0,0>,<0,-1,0>,<0,0,1>,75
            ACTL/<5,0,0>,<80,0,0>,<1,0,0>,<0,-1,0>,<0,0,1>,75
            TARG/<5,0,0>,<80,0,0>,<1,0,0>,<0,-1,0>,<0,0,1>
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              NUMHITS=5,DEPTH=2
              SAMPLE METHOD=SAMPLE_FEATURE
              SAMPLE FEATURE=NONE
              AVOIDANCE MOVE=BOTH,DISTANCE BEFORE=10,DISTANCE AFTER=10,DIRECTION=ALONG FEATURE VECTOR
            SHOW HITS=NO
A5         =ALIGNMENT/START,RECALL:A4,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN2
              ALIGNMENT/ROTATE,XPLUS,TO,LIN2,ABOUT,ZPLUS
              ALIGNMENT/TRANS,XAXIS,PNT1
              ALIGNMENT/TRANS,YAXIS,LIN2
              ALIGNMENT/TRANS,ZAXIS,PLN2
            ALIGNMENT/END
            MOVE/CLEARPLANE
PNT2       =FEAT/CONTACT/VECTOR POINT/DEFAULT,CARTESIAN
            THEO/<0,5,0>,<-1,0,0>
            ACTL/<0,5,0>,<-1,0,0>
            TARG/<0,5,0>,<-1,0,0>
            SNAP=NO
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              AVOIDANCE MOVE=BOTH,DISTANCE BEFORE=10,DISTANCE AFTER=10,DIRECTION=ALONG FEATURE VECTOR
            SHOW HITS=NO
A4         =ALIGNMENT/START,RECALL:A3,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN2
              ALIGNMENT/ROTATE,XPLUS,TO,LIN2,ABOUT,ZPLUS
              ALIGNMENT/TRANS,XAXIS,PNT2
              ALIGNMENT/TRANS,YAXIS,LIN2
              ALIGNMENT/TRANS,ZAXIS,PLN2
            ALIGNMENT/END
            MOVE/CLEARPLANE
CYL1       =FEAT/CONTACT/CYLINDER/DEFAULT,CARTESIAN,IN,LEAST_SQR
            THEO/<40,30,0>,<0,0,1>,30,10
            ACTL/<40,30,0>,<0,0,1>,30,10
            TARG/<40,30,0>,<0,0,1>
            START ANG=0,END ANG=360
            ANGLE VEC=<1,0,0>
            DIRECTION=CCW
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              NUMHITS=5,NUMLEVELS=5,DEPTH=0.5,END OFFSET=2,PITCH=0
              SAMPLE METHOD=SAMPLE_HITS
              SAMPLE HITS=0,SPACER=0
              AVOIDANCE MOVE=NO
              FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
            SHOW HITS=NO

And here's the drawing I used.

PDF

Reply

0 Neil Challinor 7 months ago

PART NAME  : OFFLINE_NO_PART_NO_CAD
REV NUMBER : 
SER NUMBER : 
STATS COUNT : 1
GD&T STANDARD : ASME Y14.5 - 2009/2018
 
STARTUP    =ALIGNMENT/START,RECALL:USE_PART_SETUP,LIST=YES
            ALIGNMENT/END
            MODE/MANUAL
            FORMAT/TEXT,OPTIONS, ,HEADINGS,SYMBOLS, ;NOM,TOL,MEAS,DEV,OUTTOL, , 
            LOADPROBE/3BY20
            TIP/T1A0B0, SHANKIJK=0, 0, 1, ANGLE=0
PLN1       =FEAT/PLANE,CARTESIAN,TRIANGLE
            THEO/<50,35,0>,<0,0,1>
            ACTL/<0,0,0>,<0,0,1>
            MEAS/PLANE,3
              HIT/BASIC,NORMAL,<5,45,0>,<0,0,1>,<0,0,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<65,55,0>,<0,0,1>,<0,0,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<80,5,0>,<0,0,1>,<0,0,0>,USE THEO=YES
            ENDMEAS/
A1         =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN1
              ALIGNMENT/TRANS,ZAXIS,PLN1
            ALIGNMENT/END
LIN1       =FEAT/LINE,CARTESIAN,UNBOUNDED
            THEO/<5,0,0>,<1,0,0>
            ACTL/<5,0,0>,<1,0,0>
            MEAS/LINE,2,ZPLUS
              HIT/BASIC,NORMAL,<5,0,0>,<0,-1,0>,<5,3,0>,USE THEO=YES
              HIT/BASIC,NORMAL,<75,0,0>,<0,-1,0>,<55,3,0>,USE THEO=YES
            ENDMEAS/
A2         =ALIGNMENT/START,RECALL:A1,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN1
              ALIGNMENT/ROTATE,XPLUS,TO,LIN1,ABOUT,ZPLUS
              ALIGNMENT/TRANS,YAXIS,LIN1
              ALIGNMENT/TRANS,ZAXIS,PLN1
            ALIGNMENT/END
PNT1       =FEAT/POINT,CARTESIAN
            THEO/<0,5,0>,<-1,0,0>
            ACTL/<0,0,0>,<0,0,1>
            MEAS/POINT,1,WORKPLANE
              HIT/BASIC,NORMAL,<0,5,0>,<-1,0,0>,<0,0,0>,USE THEO=YES
            ENDMEAS/
A3         =ALIGNMENT/START,RECALL:A2,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN1
              ALIGNMENT/ROTATE,XPLUS,TO,LIN1,ABOUT,ZPLUS
              ALIGNMENT/TRANS,XAXIS,PNT1
              ALIGNMENT/TRANS,YAXIS,LIN1
              ALIGNMENT/TRANS,ZAXIS,PLN1
            ALIGNMENT/END
            COMMENT/OPER,NO,FULL SCREEN=NO,AUTO-CONTINUE=NO,OVC=NO,
            Manual Alignment Complete.  Switching to DCC
            Machine will move when you click OK.
            MODE/DCC
            CLEARP/ZPLUS,10,ZPLUS,0,ON
            MOVE/CLEARPLANE
PLN2       =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,TRIANGLE,LEAST_SQR
            THEO/<40,30,0>,<0,0,1>
            ACTL/<40,30,0>,<0,0,1>
            TARG/<40,30,0>,<0,0,1>
            ANGLE VEC=<0.9238795,0.3826834,0>,RADIAL
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              NUMHITS=8,NUMROWS=1
              SPACER=16
              AVOIDANCE MOVE=BOTH,DISTANCE BEFORE=10,DISTANCE AFTER=10,DIRECTION=ALONG FEATURE VECTOR
              USE BOUNDARY OFFSET=NO
            SHOW HITS=NO
A4         =ALIGNMENT/START,RECALL:A3,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN2
              ALIGNMENT/ROTATE,XPLUS,TO,LIN1,ABOUT,ZPLUS
              ALIGNMENT/TRANS,XAXIS,PNT1
              ALIGNMENT/TRANS,YAXIS,LIN1
              ALIGNMENT/TRANS,ZAXIS,PLN2
            ALIGNMENT/END
            MOVE/CLEARPLANE
LIN2       =FEAT/CONTACT/LINE/DEFAULT,CARTESIAN,BOUNDED
            THEO/<5,0,0>,<80,0,0>,<1,0,0>,<0,-1,0>,<0,0,1>,75
            ACTL/<5,0,0>,<80,0,0>,<1,0,0>,<0,-1,0>,<0,0,1>,75
            TARG/<5,0,0>,<80,0,0>,<1,0,0>,<0,-1,0>,<0,0,1>
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              NUMHITS=5,DEPTH=2
              SAMPLE METHOD=SAMPLE_FEATURE
              SAMPLE FEATURE=NONE
              AVOIDANCE MOVE=BOTH,DISTANCE BEFORE=10,DISTANCE AFTER=10,DIRECTION=ALONG FEATURE VECTOR
            SHOW HITS=NO
A5         =ALIGNMENT/START,RECALL:A4,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN2
              ALIGNMENT/ROTATE,XPLUS,TO,LIN2,ABOUT,ZPLUS
              ALIGNMENT/TRANS,XAXIS,PNT1
              ALIGNMENT/TRANS,YAXIS,LIN2
              ALIGNMENT/TRANS,ZAXIS,PLN2
            ALIGNMENT/END
            MOVE/CLEARPLANE
PNT2       =FEAT/CONTACT/VECTOR POINT/DEFAULT,CARTESIAN
            THEO/<0,5,0>,<-1,0,0>
            ACTL/<0,5,0>,<-1,0,0>
            TARG/<0,5,0>,<-1,0,0>
            SNAP=NO
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              AVOIDANCE MOVE=BOTH,DISTANCE BEFORE=10,DISTANCE AFTER=10,DIRECTION=ALONG FEATURE VECTOR
            SHOW HITS=NO
A4         =ALIGNMENT/START,RECALL:A3,LIST=YES
              ALIGNMENT/LEVEL,ZPLUS,PLN2
              ALIGNMENT/ROTATE,XPLUS,TO,LIN2,ABOUT,ZPLUS
              ALIGNMENT/TRANS,XAXIS,PNT2
              ALIGNMENT/TRANS,YAXIS,LIN2
              ALIGNMENT/TRANS,ZAXIS,PLN2
            ALIGNMENT/END
            MOVE/CLEARPLANE
CYL1       =FEAT/CONTACT/CYLINDER/DEFAULT,CARTESIAN,IN,LEAST_SQR
            THEO/<40,30,0>,<0,0,1>,30,10
            ACTL/<40,30,0>,<0,0,1>,30,10
            TARG/<40,30,0>,<0,0,1>
            START ANG=0,END ANG=360
            ANGLE VEC=<1,0,0>
            DIRECTION=CCW
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              NUMHITS=5,NUMLEVELS=5,DEPTH=0.5,END OFFSET=2,PITCH=0
              SAMPLE METHOD=SAMPLE_HITS
              SAMPLE HITS=0,SPACER=0
              AVOIDANCE MOVE=NO
              FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
            SHOW HITS=NO

And here's the drawing I used.

PDF

Children

0 ESchertz 7 months ago in reply to Neil Challinor

Thanks everyone for the advice. I'm still a little unclear, but if this is something that most CMM programmers know how to do, then I guess I'd better figure it out quickly.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 ArkansasBeeper 7 months ago in reply to ESchertz

If you have access to CAD software you could just create a very simple surrogate part. You can key in the numbers for the holes right off the print. Then you will have something to start from that has surfaces and holes with proper vectors, once the part arrives you can adjust the depths so you actually hit the part in the correct spot.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel