hexagon logo
Register Sign in
  • Replies 10 replies
  • Subscribers 221 subscribers
  • Views 123 views
  • Users 0 members are here
Options
Related

Newb converting from Calypso

Travis Carlson
The transition thus far from Calypso to PC-DMIS has been seamless. I have not begun writing overly complex programs in PC-DMIS yet however I am encountering a peculiar error at the beginning of my DCC run in a basis program. The attached graphic shows the features completely off the cad model and when the CMM comes in to take the first DCC point it searches about 20 inches in negative x axis from where the model is located on CMM.

STARTUP =ALIGNMENT/START,RECALL:USE_PART_SETUP,LIST=YES
ALIGNMENT/END
MODE/MANUAL
MANRETRACT/2.54
FORMAT/TEXT,OPTIONS, ,HEADINGS,SYMBOLS, ;NOM,TOL,MEAS,DEV,OUTTOL, ,
LOADPROBE/TIP3-2MM
TIP/T1A0B0, SHANKIJK=0, 0, 1, ANGLE=0
PLN1 =FEAT/PLANE,CARTESIAN,TRIANGLE
THEO/<0.0084,0,0.002>,<0,-1,0>
ACTL/<14.5476,26.0536,2.2737>,<-0.0000121,-1,0.000241>
MEAS/PLANE,3
HIT/BASIC,NORMAL,<0.0146,0,0.7841>,<14.6258,26.0538,3.1313>,USE THEO=NO
HIT/BASIC,NORMAL,<-0.6874,0,-0.3948>,<15.1261,26.0535,1.8449>,USE THEO=NO
HIT/BASIC,NORMAL,<0.6981,0,-0.3832>,<0,-1,0>,<13.8909,26.0535,1.8448>,USE THEO=YES
ENDMEAS/
WORKPLANE/YPLUS
CIR1 =FEAT/CIRCLE,CARTESIAN,IN,LEAST_SQR
THEO/<0,0.09,0>,<0,1,0>,1.195
ACTL/<14.5127,26.1683,2.3472>,<0,1,0>,1.1962
MEAS/CIRCLE,3,YPLUS
HIT/BASIC,NORMAL,<-0.4883,0.0867,0.3444>,<0.8172059,0,-0.5763459>,<13.989,26.1683,2.636>,USE THEO=YES
HIT/BASIC,NORMAL,<0.4473,0.1006,0.3962>,<-0.7486041,0,-0.6630173>,<15.0367,26.1684,2.6355>,USE THEO=YES
HIT/BASIC,NORMAL,<-0.0863,0.0827,-0.5912>,<0.1445093,0,0.9895034>,<14.5313,26.1683,1.7493>,USE THEO=YES
ENDMEAS/
PNT1 =FEAT/POINT,CARTESIAN
THEO/<0.775,0.035,0.125>,<0,0,-1>
ACTL/<15.3075,26.0932,2.4603>,<0.0036817,-0.0103087,-0.9999401>
MEAS/POINT,1,WORKPLANE
HIT/BASIC,NORMAL,<0.775,0.035,0.125>,<0,0,-1>,<15.3075,26.0932,2.4603>,USE THEO=YES
ENDMEAS/
PNT2 =FEAT/POINT,CARTESIAN
THEO/<0.775,0.035,-0.125>,<0,0,1>
ACTL/<15.3075,26.0935,2.2089>,<0.0038879,-0.0168478,0.9998505>
MEAS/POINT,1,WORKPLANE
HIT/BASIC,NORMAL,<0.775,0.035,-0.125>,<0,0,1>,<15.3075,26.0935,2.2089>,USE THEO=YES
ENDMEAS/
PNT3 =FEAT/POINT,CARTESIAN,NO
THEO/<0.775,0.035,0>,<0,0,1>
ACTL/<15.3075,26.0933,2.3346>,<0,0,1>
CONSTR/POINT,MID,PNT1,PNT2
LIN1 =FEAT/LINE,CARTESIAN,UNBOUNDED,NO
THEO/<0,0.09,0>,<0.9974913,-0.0707897,0>
ACTL/<14.5127,26.1683,2.3472>,<0.995457,-0.0939018,-0.01574>
CONSTR/LINE,BF,3D,CIR1,PNT3,,
OUTLIER_REMOVAL/OFF,3
FILTER/OFF,WAVELENGTH=0
A1 =ALIGNMENT/START,RECALL:STARTUP,LIST=YES
ALIGNMENT/LEVEL,ZPLUS,PLN1
ALIGNMENT/TRANS,ZAXIS,PLN1
ALIGNMENT/ROTATE,XPLUS,TO,LIN1,ABOUT,ZPLUS
ALIGNMENT/END
MODE/DCC
MOVESPEED/ 150
PREHIT/0.025
RETRACT/0.025
CLEARP/ZPLUS,0.375,ZPLUS,0,ON
MOVE/CLEARPLANE
PNT9 =FEAT/POINT,CARTESIAN
THEO/<-0.7886,0.125,-0.0541>,<0,-1,0>
ACTL/<-0.7886,0.125,-0.0541>,<0,-1,0>
Attached Files
  • In your alignment, you don't zero out X or Y, only Z.

    You levelled and rotated, but no zeroing.

    The actual for your circle is
    13.989 , 26.1683 , 2.636.

    That X and Y are your error in location.
  • In your alignment, you don't zero out X or Y, only Z.

    You levelled and rotated, but no zeroing.

    The actual for your circle is
    13.989 , 26.1683 , 2.636.

    That X and Y are your error in location.


    +1

    You should always aim to lock down all 6 degrees of freedom in an alignment, there are exceptions to the rule but not usually for the first alignment.

    I always go:
    Level Z
    Translate Z
    Rotate Xplus to Lin1 about Z plus
    Translate Y to Lin1
    Translate X

    X is usually a point/circle/plane

    The easiest alignments to learn are the 3,2,1 alignments. Take 3 points on the top surface and construct a plane, take two points on a side surface and construct a line and finally take a single point on a perpendicular surface to the line. All assuming of course that you are measuring a square block. However the same rules apply for most parts. I am guessing you know most of that though.
  • I cannot even claim rookie mistake on the missed zeroing in alignment for X and Y. Thanks for the quick reply to bring my head back in check. As far as the features showing off the part, is this a normal PC-DMIS thing or something I will battle being that I am still running 2015 possibly? I have noticed this on all other parts I have programmed and run as well.
  • I cannot even claim rookie mistake on the missed zeroing in alignment for X and Y. Thanks for the quick reply to bring my head back in check. As far as the features showing off the part, is this a normal PC-DMIS thing or something I will battle being that I am still running 2015 possibly? I have noticed this on all other parts I have programmed and run as well.

    I think what you have done is you have taken manual points on the part located on the granite?

    Your CAD from what I can see has the Coordinates 0,0,0 at the centre of the part. When you have taken the points on the part located on the CMM those coordinates have been in machine coordinates and so they don't match up.

    There is a button called CAD=part which should sort this out for you. However I never use it so explaining how to use it isn't probably a good idea for me to do.

    However as you have a CAD model and so far it is a short program what I would suggest to do is to start a gain but this time pick the points you want to measure off of the CAD model instead of the part. Use the auto features to select what you want. I would recommend using the auto vector points and then constructing a plane/line out of those auto points. Doing it this way, everything will keep the coordinates of the CAD model and your measurements should line up.

    Hope that helps a little
  • When programming, there is a button to enter "Program Mode" with the cursor. Click the model with the cursor where you will take your hits.

    It will then associate the model to your alignment when you take the hits.

    If I am understanding your question correctly. After this initial alignment, all features will be on the model visually.
  • If you ever need something more than text explanations YouTube is your best friend though you're very welcome to ask anything on here, most if not all are very happy to help. Welcome to the forum and best wishes on your new adventure with PCD!
  • Thanks for all the help. Though this was my first post, I have gleaned so much valuable information previously from reading other threads.
  • Probe manually and make sure the Cad model has its origin where you will be setting up yours. Otherwise you can always transform the 0s of the cad before your manual alignment just after importing it. In your first manual alignment (once you made sure your CAD model's 0 is what you have effectively probed and planning to align to) click CAD=Part once you have levels/rotated/translated. The features will snap to your CAD model in the graphics window. Keep in mind that CAD=Part cannot be undone so better save before and create a copy / new rev (good practice in general when messing with alignments).
  • I just saw that this is a 5 YO post, not sure how it popped up lol. In any case maybe it will help someone so the info still stand
© 2024 Hexagon AB and/or its subsidiaries. Privacy Policy | Cloud Services Agreement