Quantcast
Channel: PTC Community : Document List - Creo
Viewing all 184 articles
Browse latest View live
↧

Making o-rings flexible in assemblies

August 12, 2013, 7:48 am
$
0
0

A quick flexibility and family table application for an o-ring.

 

Certainly not exceptionally comprehensive but easy to use if you must show multiple states of an o-ring on a drawing.

 

The challenge here was to make a rectangular shape round with flexible components.  A revolve section sketch will not allow lines to go to zero length like some features allow.  The second best choice was to add a round to a rectangular profile.

 

For this instance is an o-ring that has a defined groove of .125 x .093.  The o-ring's free state sectional diameter is .125.

A perimeter value in a sketch is used to confirm, but not utilize the value of the resulting radii when the o-ring is squished.  The required level of accuracy here is purely up to the user.  In this case, I chose that the perimeter remains constant.

note: relations cannot be used with dimensions applied to flexible component tables.

The o-ring model was created in the squished state.  This is purely a matter of choice as both affected dimensions are overwritten at the assembly level with family tables.

 

What makes this work is the ability to make a square profile fully round with the round feature.

 

Let me know if you have any questions.

 

Enjoy.

 

Attention:You will need to update your browsers Flash Player plugin to see videos on this site.

Update your Flash Player here. Its free and fast.

');}); });
↧
Search

Creo 2.0 Sheetmetal - Simplified Reps for flat pattern drawings

September 24, 2013, 8:38 am
$
0
0

The flat pattern feature is persistent about being the last feature in a model tree.  There is a way around this using simplified reps.  This work-around is specifically geared toward maintaining a master rep as you default assembly part where the sheetmetal part remains in the formed condition by default.

 

This technique uses the bend back feature -after- the flat pattern.  It is a similar method to using unbend and bend back but it was requested to study this option using the flat pattern feature.

 

This is not a good technique for forms.  You will note in the video that the flatten forms option is specifically not selected.  Note that forms can be flattened as a separate operation, but in a simple technique where the master rep should be the master part, this is not as simple as defined in this document or this video.

 

Please feel free to add comments and further the discussion.

 

And I apologize for the video quality overall.  It is the best I can do with the tools at hand.

 

The video aims to:

  • show how to add a bend back feature after the flat pattern feature using simplified reps
  • show how to make a drawing with both types of views using the simplified rep
  • show how to toggle the two states using the display state (all) feature
  • show how the default assembled model is the as-fabricated part.

 

↧
↧

How-to model a 3D Jack O' Lantern in CREO

October 22, 2013, 9:10 am
$
0
0
  1. Create center axis, a plane at 18 degrees (360/10/2) and a horizontal sketch of a vertical pumpkin slice section which edge touch the 18 degrees plane. (you should mirror the slice on the front plane)

1.png

 

 

 

2. Create a vertical sketch representing the outer edge of the pumpkin on the 18-degrees plane. The end should touch the end of the earlier created horizontal line.

2.png

 

 

3. Mirror the vertical sketch on the front-plane. Close the loop by adding another horizontal plane and sketch touching the top-ends of the vertical lines.

3.png

 

 

 

4. Create a boundary blend and make sure the lower horizontal line is tangent to the plane it was created on.

 

 

4.png

 

 

 

5. Pattern the boundary blend 10x around the center axis (divided by 360 degrees)

5.png

 

 

 

6. Merge the quilts, and rounds and mirror the whole around the top plane and merge again.

6.png


 

 

7. Add a hole in the bottom surface for the tea-light, by extruding a cut on the top-plane

7.png

 

 

8. Create an extrude on the front plane of the cut-out face. In this case a “smiley” I imported in sketcher from a dxf file I created earlier with Adobe Illustrator using an image downloaded from google images.

8.png

 

 

9. Create three copies of the same sketch on slightly different offsets from the top-plane which will become the pumpkin-stem-base.

9.png

 

 

10. Use these sketches to create a solid blend

10.png

 

 

 

11. Create a curved line, or several  lines on top of the stem-base by first creating new planes under different angles.

11.png

 

 

 

12. create a solid sweep using the same sketch as the top of the stem-base. I used a trajpar relation in the sketcher to have the stem diameter become smaller to the end of the trajectory.

12.png

 

 

 

 

13. Thicken the surface model and add rounds between the stem and pumpkin.

13.png

You can finish the model by adding some nice appearance colors and by hiding the sketch lines.



↧

Creo Parametric - R & Z Patterning

December 13, 2013, 12:17 am
$
0
0

A quick video on how to use the dimension pattern to get a rotation element (R) and a depth element (Z) in one shot.

 

If you have an occasion to make use of this technique, you will recognize it.

 

Notice that the sketch plane for the revolve is internal; the Z direction reference is provided in the sketch.

 

↧

Modeling a Ring Lug in 5 Minutes

December 19, 2013, 3:07 am
$
0
0

This video is to show how to model a realistic ring lug in 5 minutes using the Warp feature.

 

Enjoy! 

 

↧
↧

How to Make Splines.docx

December 20, 2013, 8:00 am
↧

Techniques - Heater Coil for Cylindrical Furnace

December 22, 2013, 4:53 pm
$
0
0

This was requested for a project.  The technique involves wrapping a sketch onto a cylinder but it also highlights a lot of techniques in sketching.  I tried to add annotation to the video to help understand the process.

 

This is the simple version.  This can be taken to the next level with a number of options to make this more universal but for the average user, this is more than sufficient to have a sustainable model.  In reality, the wire would not lay on a cylindrical plane.  It would traverse in many orientations and the level of effort can be exponential complicated very quickly.

 

Of course, there is a next level as to how to exit the wires from the chamber but that is another level.  YouTube has a 10 minute limit for most of us

 

Always ask yourself what the end goal is and see if this video will help you better understand a few basic techniques for making robust sketches.

 

 

Here's a bonus - "Fire Red"

 

fire_red.PNG

↧

Predefining a sketch origin

January 14, 2014, 6:00 am
$
0
0

By what I experience in an assymetric sketch, inserting a sketch from a file or from a pallette initially places the white positioning handler in the center of the sketch, but only if there is an element such as a point or centerlines throuch that center. If no element is found in the center of the sketch, the handler seems to snaps to the element nearest to the center of the sketch.

 

A new sketch on the palette is a L-beam, which we preferrably position by its 'angle point', and where the center of the sketch is of no practical use.

 

A predefined position of the positioning handler on the sketch would provide a functionality similar to component interfaces, and would avoid repositioning the handler every time the sketch is used.

↧
Search

Import Data Doctor WF4.pdf

January 17, 2014, 11:44 am
↧
↧

Apple Macbook Pro grafic problem with creo 2.0

February 3, 2014, 10:55 am
$
0
0

Hello guys!!

 

I am using the student version on my Macbook pro with retina display 15.4"  2.4ghz on "Parralles" a virtual machine.
My problem are the assemblys! Every part gets hundrets of lines and if i click on any part the virtual maschine breaks down (see the picture).I have all settings on the virtual machine on the max and it still don't works.

 

 

Maybe somebody of you can help me?!?!

I hope somebody of you can help me soon, because i need the programm on school.

 

 

Best would be if PTC brings out a version for Apple!!!

 

sorry for my english lol

↧

Simulated Fluid Flow for Presentations

February 4, 2014, 4:30 pm
$
0
0

Have you ever needed to create a presentation where you wanted to show fluid flow ?

 

Here is an interesting technique using mechanism to create a fluid flow simulation.

 

The idea is simple enough; create a basic "swirl" geometry...

 

FluidFlow_element.PNG

This is a simple helical sweep following whatever shape you want the fluid to follow.  In my case, a simple conic.

 

Save a copy of your "vane" using the Mirror Part option.

 

I used an assembly to pattern the single vain. 

For some reason, patterning failed within the part file, so to simplify the overhead I made this assembly and one like it with the mirrored vane.

 

FluidFlow_asm.PNG

 

In the next-level assembly, both the original and the mirror version are assembled on top of each other.

In the Mechanism application, you can use either a motor or a gear connection to rotate these assemblies in opposite directions.

 

 

 

FluidFlow_mechanism.PNG

I also applied a glass appearance.  This makes for a profound effect when you use the Shade with Reflections for your annotation.

Just remember that transparency can add a huge overhead to your graphics processing.  The above image has transparency disabled in Options.

 

Here is the mechanism animation comparing use of lower quality graphics in Shaded mode and HQ settings and Shaded with Reflection selected:

 

 

Flow rates are easily managed with Mechanism and volumes can be simulated with the initial geometry.

 

Remember to use HD setting in YouTube.

 

Enjoy!

↧

Enhancement Requests for Technical Committees (Spreadsheet)

February 5, 2014, 11:40 pm
↧

Creo 3.0 selected development areas

February 12, 2014, 11:34 pm
$
0
0

In attachment can be found presentation of Creo 3.0 selected development areas.

↧
↧

PTC Product Calendar

February 12, 2014, 11:43 pm
↧

Creo Parametric - R & Z Patterning

December 13, 2013, 12:17 am
$
0
0

A quick video on how to use the dimension pattern to get a rotation element (R) and a depth element (Z) in one shot.

 

If you have an occasion to make use of this technique, you will recognize it.

 

Notice that the sketch plane for the revolve is internal; the Z direction reference is provided in the sketch.

 

↧
Search

Hiding unwanted dimension IDs in 3D model.

February 23, 2014, 10:18 pm
$
0
0

Hi,

 

I am able to hide unwanted dimension ID in 3D model (example: unwanted dimensions means if we create one coordinate system it will create X,Y,Z direction dimensions, but i need only X direction dimension ID to display and i do not want Y & Z dimension ID to be displayed) in Creo elements and below versions I use to hide this unwanted dimension ID in layers it was working good, but in Creo 1 or Creo 2 if i hide unwanted dimension ID in layer it is still displaying when i edit the coordinate system.

Is there any other way to hide the unwanted dimension ID in Creo 2? If  not please include this option to hide unwanted dimension ID in Creo 2, which was there in earlier versions.

 

Thanks

↧

Screen Captures w/ Background Image

March 2, 2014, 5:55 pm
$
0
0

The tips provided in this forum by excellent users are simply invaluable to develop techniques easily overlooked.

 

In this case, the fact that you can create a coordinate system normal to the screen is key to making datum planes normal to predefined views.

 

The exercise in this video will open up opportunities to utilize this capability.

 

Feel free to post comments and questions.

 

 

Remember to change the video to an HD setting

↧
↧

Editing with the Warp Feature - Managing Symmetry

March 5, 2014, 5:06 pm
$
0
0

This video shows how you can attempt to maintain symmetry in your Warp Feature edits.

 

It is unfortunate that we have little control over the marque but you can use reference geometry as a visual reference. 

In this case, the extrude feature has geometry points that extrude to axes. 

Also notice the repositioning the narrow edge based on the original marque rather than an axis reference.

 

Selecting nodes is done by selecting the 1st node and using the CTRL key to select additional nodes. 

Selected nodes are green; highlighted nodes are dark red; symmetry nodes are bright red, when using the default color scheme.

 

This is only one way to use this feature.  This technique is only one of many that could be written for a Warp edit.

 

Enjoy.

 

 

...Remember to use the HD setting for a clearer view.

↧

Techniques - Heater Coil for Cylindrical Furnace

December 22, 2013, 4:53 pm
$
0
0

This was requested for a project.  The technique involves wrapping a sketch onto a cylinder but it also highlights a lot of techniques in sketching.  I tried to add annotation to the video to help understand the process.

 

This is the simple version.  This can be taken to the next level with a number of options to make this more universal but for the average user, this is more than sufficient to have a sustainable model.  In reality, the wire would not lay on a cylindrical plane.  It would traverse in many orientations and the level of effort can be exponential complicated very quickly.

 

Of course, there is a next level as to how to exit the wires from the chamber but that is another level.  YouTube has a 10 minute limit for most of us

 

Always ask yourself what the end goal is and see if this video will help you better understand a few basic techniques for making robust sketches.

 

 

Here's a bonus - "Fire Red"

 

fire_red.PNG

↧

Yet another Thread thread - UTS Implementation

April 12, 2014, 10:56 pm
$
0
0

I just wanted to post a a little helper file for creating internal and external threads based on the Unified Thread Standard (UTS) which covers both English and Metric.

 

I must give high kudos' to Wikipedia.  I borrowed their images and tables for the attached Creo 2.0 full version parametric file.  You will also find a linked link in the site if you turn on annotation.

 

See the relations to drive the pitch and diameter you are interested in.  The file is set up for English but you can change it to metric units, if that is your primary usage.  Most everything that can be driven by relations has been.  Only 3 variables are needed... and TPI (thread per inch) is set to zero if you want to define the pitch directly for metric threads.  See the "IF" statement in Relations.

 

I did have some troubles along the way.  I split up the helical sweep because it -did- fail if I did it in one go although it did not overlap anywhere.  This was customer support's "works as expected" Pro|WorkAround© for helical sweeps that fail otherwise.  This made the file more robust for changing threads on the fly through relations.

 

Of course, I suggest you make a library part of the two sketches in the file and use them liberally.  Otherwise, the file is a nice quick reference for many thread features.  And if you link into Wikipedia, you will find even more excellent information about this standard.

http://en.wikipedia.org/wiki/Unified_Thread_Standard

http://en.wikipedia.org/wiki/ISO_metric_screw_thread

 

Here are some of the highlight images from the file... turn off planes and CS' and turn on Annotation, Axes, and Points. 

The images should be saved in the file so no external reference issues should exist.

 

thread_standard.PNG

 

These are the actual "thread cutters"...

 

thread_standard_closeup.PNG

 

This is the structure of the file...

thread_standard_file.PNG

 

And I love intelligent parametric sketches...  yes, I have the rounding turned off on purpose.

 

thread_standard_section.PNG

 

If you find a serious bug, let me know.  Otherwise, enjoy!

↧
Viewing all 184 articles
Browse latest View live
Search
<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>