Does anybody know if Hexagon offers a (more or less) programming class to learn to use expressions? I've been wanting to get started on these, and reading through the core files. I can think of several ways at least that they can be used here. Locally there is a metrology shop that offers a four hour course, but I took Java in college and as I recall programming isn't something you pick up in four hours.
One of the bigger parts we have here (about 120" long) the customer wants us to run it datum A down. Datum A consists of 7 target points so we made 7 posts for the datum A to lay on. They are at different heights too. After posts are installed CMM checks the heights and then informs the operator how they measure in Z. So the Z axis measurement is pulled out of the feature as a variable and then compared to nominal. This way the operator can shim the posts if needed to make the datum A flat.
PL05 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,TRIANGLE
THEO/<11,-0.2,0>,<0,0,1>
ACTL/<11,-0.1998,-0.0005>,<0.0000518,-0.0002234,1>
TARG/<11,-0.2,0>,<0,0,1>
ANGLE VEC=<-1,0,0>,RADIAL
REPORT VEC=<0,0,1>
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=NO
$$ NO,
****************************************
ASSIGN/VA5=PL05.Z
$$ NO,
****************************************
ASK_P5 =COMMENT/YESNO,NO,FULL SCREEN=YES,AUTO-CONTINUE=NO,
"Z NOM= 0.00"
"THE POST IS AT AT"
"Z ACT ="+ " " + VA5
ADJUST AND PRESS NO
OR IF OK PRESS YES
$$ NO,
****************************************
IF/ASK_P5.INPUT=="YES"
GOTO/NEXT_A6
END_IF/
IF/ASK_P5.INPUT=="NO"
GOTO/POST_A5
END_IF/
One of the bigger parts we have here (about 120" long) the customer wants us to run it datum A down. Datum A consists of 7 target points so we made 7 posts for the datum A to lay on. They are at different heights too. After posts are installed CMM checks the heights and then informs the operator how they measure in Z. So the Z axis measurement is pulled out of the feature as a variable and then compared to nominal. This way the operator can shim the posts if needed to make the datum A flat.
PL05 =FEAT/CONTACT/PLANE/DEFAULT,CARTESIAN,TRIANGLE
THEO/<11,-0.2,0>,<0,0,1>
ACTL/<11,-0.1998,-0.0005>,<0.0000518,-0.0002234,1>
TARG/<11,-0.2,0>,<0,0,1>
ANGLE VEC=<-1,0,0>,RADIAL
REPORT VEC=<0,0,1>
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=NO
$$ NO,
****************************************
ASSIGN/VA5=PL05.Z
$$ NO,
****************************************
ASK_P5 =COMMENT/YESNO,NO,FULL SCREEN=YES,AUTO-CONTINUE=NO,
"Z NOM= 0.00"
"THE POST IS AT AT"
"Z ACT ="+ " " + VA5
ADJUST AND PRESS NO
OR IF OK PRESS YES
$$ NO,
****************************************
IF/ASK_P5.INPUT=="YES"
GOTO/NEXT_A6
END_IF/
IF/ASK_P5.INPUT=="NO"
GOTO/POST_A5
END_IF/
