CAD=PART

[Mark Farren]

Anyone had any problems using CAD=PART in ver. 3.7 mr2? I did it the other day and it changed all my move points and rendered the program useless . My part was sitting with the alignment holes at about a 10 deg. angle in the Z direction and it seemed to be "rotating " the numbers down as if to level the part out to the table. Never had this happen before. Am I missing some setting somewhere? Only been using 3.7 mr2 for a few weeks.
TIA

[Wes Cisco]

????

I have used CAD=PART in 3.7 MR2 several times and never had problem, so I don't think is it a MR2 bug, but you never know. . . HTH

[Cumofo]

CAD=PART is only usefull if you know exactly where the CAD origin is related from. Obiously the origin you described to the machine during your alignment is not the origin described by the CAD engineer.

Check out my post on EXTERNAL ALIGNMENTS AND MODELS.

Gabriel

[Paul Sarrach]

nope have not seen it. But if you quit and and not save you will be alright

[kbotta]

have not had a prob. when I used it. Did you by chance also "best fit" in the program, or iterative align also?
kb

[Mark Farren]

I have used it a couple times as well in 3.7 and didn't seem to notice any problems, but the part was sitting more normal to the coordinate system so maybe I just didn't notice it. I am going to try a program in 3.2063 here in a bit and see if I have the same problem. We use a lot of cad models and I don't think I'll have any issues, but maybe I'm still stuck in a Monday!

[Mark Farren]

I verified the coord. system prior to programming to assure the cad coord. were where they were supposed to be and they were. The part has 2 bores on one end that are -A- and 2 on the other end that are -B-. Create 3D line thru -A- and level, pick up one -B- bore, construct 3D line from the same side -A- bore to the -B- bore, then rotate to that line. THe -B- bores are physically sitting about 10 degrees higher in the Z axis than the -A- bores. This runs great with out a cad model but as soon as you do CAD=PART, it changes(rotates down) all the move points and hole theos for the -B- bore.

No, I did not best fit. This should be a pretty simple alignment system and I do know exactly where the cad coord. are and I am setting the part up the same way.

[Matthew D. Hoedeman]

Check the vector of the A to B line, make sure that it is going to correct way for the rotation axis you used, if it is backwards, the alignment will be 180 degrees off, if this is what the problem is.

[Cumofo]

Ok you need the shizz:
1) Start your Pc-dmis program with the CAD Model first.
2) Program your manual hits as programed from off the model (offline style).
3) START THE PROGRAM, follow the programmed manual alignments hits, go DCC and smile.
4) Regardless of the cad alignment this will work and it will put you origin where YOU want it!!
5) Buy me lunch.

Gabriel

[Mark Farren]

Okay, hopefully the pic uploads okay. The part is sitting on the flat surface on the bottom which makes the holes on the opp end of the trihedron about 2.375" higher than the holes on the trihedron end. Per the cad model and print, the zero is the centerline of all 4 bores and that is how I am setting it up. Then when I do cad=part, it rotates my numbers down in Zminus. This basically says I can't sit a part on the machine a bit crooked and do cad=part. Unfortunately, I was able to re-create this error in 3.2063, I must really be suffering from crainial rectal inversion. I will try Cumofo's suggestion as soon as I get a chance as it is nearly beer 30 for me!

[Cumofo]

Yes! CAD=PART is not the only answer!!!
Trust me, I've haven't hit the CAD=PART button for years, and I refuse to work without a CAD model.

1) Start your Pc-dmis program with the CAD Model first.
2) Program your manual hits as programed from off the model (offline style).
3) START THE PROGRAM, follow the programmed manual alignments hits, go DCC and smile.

a) Don't hit the CAD=Part button!
b) You can align at any time, don't wait for all the features to be compiled before you start the alignment calls.
c) level off any feature on the part in maual mode, and then get it nailed with the dcc, make things easy on yourself.

-Gabriel