Any OpenDMIS users here?

[Ballistic316]

Sup guys, I am new to this forum and like most of you I have issues with opendmis. I have taught myself up until now but am now at a stopping point. Is there anyone who can assist me on how to get a iterative alignment to work in this software?

[Bferguson5]

I too am new to OpenDMIS and, unfortunately have been stuck with the oldest version (1.0) of the software. I was curious to see if anyone would know how to align a CRD system to circle features on a part. The part that I am trying to program is circular with thru holes at each quadrant that I am trying to align my CRD to. The problem is the CRD always is skewed on the XY plane causing my tolerances to be thrown off. All I want to do with this part is program it to align the CRD to the center of the part with the X and Y axsys' directly through the respective through holes.
If anyone could help me with this I would greatly appreciate it. Thank you.

[Oplock]

Sup guys, I am new to this forum and like most of you I have issues with opendmis. I have taught myself up until now but am now at a stopping point. Is there anyone who can assist me on how to get a iterative alignment to work in this software?

Hi Ballistic,
What are you meaning by an iterative alignment? Are you meaning automated tip calibration at multiple angles?

[joe perry]

I too am new to OpenDMIS and, unfortunately have been stuck with the oldest version (1.0) of the software. I was curious to see if anyone would know how to align a CRD system to circle features on a part. The part that I am trying to program is circular with thru holes at each quadrant that I am trying to align my CRD to. The problem is the CRD always is skewed on the XY plane causing my tolerances to be thrown off. All I want to do with this part is program it to align the CRD to the center of the part with the X and Y axsys' directly through the respective through holes.
If anyone could help me with this I would greatly appreciate it. Thank you.

The thing I do in that case is pick up the through holes and make a best fit line out of them. Then build your coordinate system from the top of the part as your Z direction/origin, the OD or ID of the part as your Y (or X) origin , and finally, the best fit line as your X (or Y) direction/origin*. *You'll have to set your OD or ID as your X and Y origin depending on weather your holes comprise your datum or the axis of the part does. Obviously, you can choose holes opposite of each other or (assuming the holes are equally spaced about the axis of the part) choose holes next to each other or even both sets of holes for your X as well as your Y. Guess it depends mostly on what features you need to align to but most likely the axis of the cylindrical part is most important. The best fit line will 'clock' your coordinate system even though it may not be the feature that you want to use for the origin of your datum. This make sense? Hope it helps.

[SERDMAN88]

Spent 4 years programming with PC-Dmis. I took 4 years off to raise my son and now I am back programming, but with Open Dmis. I would like to mirror a whole program. I am only seeing options to mirror features and cad models. Does anyone know how or if this is even possible with Open Dmis?

[joe perry]

Sounds funky. So you want to make a mirror of a program? I'm trying to think of a case where I'd need to do that but can't imagine. I've made a 2-up program (to check two parts per run) but not mirrored. Mind sharing the purpose? Were you able to do it in pcdmis?

[wiks]

I would imagine if you have a left hand and a right hand part, you should be able to mirror the program of a left hand into a right hand??

[wiks]

Tolerance question. When checking for true position, does anyone know where to input the locations of the dimensions I want to check. Usually you have basic dimensions you apply, but I am not able to find it on Dmis under the true position tolerance.

[joe perry]

Did you get an answer for this tolerance question yet? If not, here's my experience. The basic dimensions are already in the definition of your nominal feature. i.e. You've defined and saved to your features database/ DMIS code the nominal/actual of a feature or you've extracted from a CAD model a feature. The true position measurement function compares the nominal (basic) dimensions of a feature to the actual (measured) dimensions of that feature in relation to your coordinate system. There are features that will not work with the true position function. One of them is a cone. I think you can find in the help file all of the features that won't work but I'm not sure. Hope this helps.

[wiks]

Thanks for your help Joe. Question.... I would like to mirror a program, but have no idea on how to do it. The reason for it is I have a left hand and a right hand part. It's a big one and I do not feel like writing it from scratch. Can anyone assist me with this?

[joe perry]

I'll see if I can try today. I'm guessing it all might start in constructions with mirroring all of the features but I think I recall an option to mirror DMIS code. I'm guessing you don't have a cad file(s)?

[wiks]

As of right now I don't. Thats something we are looking to the future on. I am currently running the right hand version of the parts and have the left hand waiting on me. Once I am done I will also try the different options in DMIS. There just has to be the option somewhere. Thanks for your quick response.