Skip to main content

multi start threads. three separate threads 120 degrees apart

Featured

Comments

19 comments

  • Jacant

    To select the 'thread' that you want to Copy/Move. Select all of the 'faces' by dragging a box around them. Make sure all of the 'thread' faces are selected.

    You could also try to Combine/Join by selecting the solid and the surfaces.

    0
  • gary

    I made some progress with the threads. I was able to separate the first thread I made from the pipe and move it up above the original pipe. I was then able to create the other two threads 120 and 240 degrees from the original thread. I now have the three threads sitting above the pipe. How do I combine the threads to the pipe?

    Thanks,Gary

     

    0
  • Jacant

    Make sure that all of the parts touch. Use the Combine/Join tool. Either select all the parts and use the tool, or select one part then with the CTRL key down select the other parts.

    0
  • gary

    Tthis where Im at and stuck cant seem to join the threads with the pipe

    0
  • Jacant

    0
  • tab...

    Hi Gary.

    What Jacant has said will work...

    If i can add something - i find it's easier when adding / subtracting is to ensure the + or - bits to be solids... i also check their geometry is OK.

    I mention this because i saw your 3 threads were surfaces or collections of surfaces. It's more work doing it that way in my opinion.

     

    Doing it the Jacant way* ( *recommended ), see below, the single thread (solid) was removed from a cylinder solid and geometry checked, then the thread portion (box selected (L to R ) was selected and patterned. Fast'n quick...

    0
  • gary

    Tim

    I started over with a single thread in the pipe and move the thread up out of the pipe and it shows up as a suface how do I move it as a solid. In your picture of the 3 threads the threads show up in your structure as solid I dont understand what I,m missing here ", then the thread portion (box selected (L to R ) was selected and patterned. Fast'n quick..." I dont see a thread portion (box selected (L to R ) where do I find that and what does L and R mean? 3D drawing is new to me as I have been doing 2D in Bobcad for plasma cutting but I now have a 3D printer and 3D drawing and DesignSpark are all new to me.

    Thank you, gary

    0
  • tab...

    Hi Gary.

    You're not really missing anything - it's just the way i did it.

    I firstly made a hollow cylinder, the ID matches the thread D min. Key K for sketch and select center axis of cylinder.

    In a sketch, draw the basic thread triangle. I find it best to 'Fade the Scene' - this shows drawn lines very clearly - if you want, add the root and crest radius now or make it the last thing you do in modeling. Generally fillets / rounds can add geometric challenges to complex faces, so these are the last details to add to a design - well, usually...also it always pays to work 'light' with the fewest faces etc.

    So, back to the sketch, a connected three sided triangle, key D for 3D, a surface appears in the Structure Browser. Select and Pull ( key P) using the Center Line of the thread (Cylinder Axis) - in options choose Helix option, using tab key / mouse to select and enter values of helix as requested.

    Now you should have a single solid thread...lets get to this stage first. The three solids you see are my initial 3 solid threads - a single one copied as you did at 120 and 240 degress. This was / is the way i usually model with solids - but as Jacant said, if you managed a single thread ( that is good - hence i asked for a geometry check), then selecting all the single thread faces, using a box select process, it's possible with using 'move', to make a pattern - it's an option within the move command. This method shown in the 2nd image has a different structure ( not shown) than the first method.

    I hope this explains.

     

    L= Left R=Right.

    Boxing L to R is a selection process that only selects visible entities that and are completely within the 'Boxing'.

    Boxing R to L selects ALL visible items partially touched / clipped, plus all that are completely within the 'Boxing'

    0
  • Jacant

    ...move the thread up out of the pipe and it shows up as a suface how do I move it as a solid...

    The only way to move the 'thread' up as a 'solid' is when the thread was created use the 'No Merge' option.

    I don't understand why you want to move the thread up.

    If you want to Copy/Move the 'Thread solid' select it and either Copy/Move by 120° twice, with the Ctrl key down. Or use the 'Create patterns' option. Then use the 'Combine/Cut' option.

    0
  • Jacant

    I think I have found your problem.

    When you select the 'Faces' of the thread to Copy/Move. Make sure you select and move the 'Anchor' to the center of the cylinder. Drag the 'Anchor' to the edge of the cylinder for it to be placed correctly. It is not where you think it should be.

    The image on the left is using the move tool with the 'Anchor' placed automatically. The right image shows the Move 'Anchor' repositioned to the center of the cylinder.

    0
  • gary

    I'm sorry to be such a pain but I'm not getting this. I click on the move icon then I check the create pattern box and then click on the thread and grab the blue anchor line and rotate it 120 deg twice and I end up with the original cut thread and the other two are just surface lines not cut into the pipe as shown below. I really appreciate all of you helping me with this, I just wish I could understand this better than I am.

    Again thank you all very much,

    Gary

    0
  • Jacant

    The image illustrates what I said above.

    When you select the surface of the thread, the 'Anchor' is automatically placed at the center of it. You would assume that the 'Anchor' would be at 0,0. Not necessarily, It will depend on the shape of the thread only, not the cylinder.

    So select the thread and Grab the center of the Anchor and move it to the edge of the cylinder. It will automatically jump to it's center at 0,0.

    To check this, do as the image shows. Select either and use the 'Move' tool with the option of XYZ. to see exactly where the 'Anchor' is.

    0
  • tab...

    Gary.

    To illustrate what Jacant is saying - and he's totally right, i've made some gifs. It's also very important your geometry is correct as i said above.

    Firstly please check the geometry for integrity , also,In the structure browser, please ensure it's tidy with no extra surfaces as an example.

     

    As an additional check for, lets just check were selecting what we believe we are - notice what the information bar reports as selected. in this case, just 2 Faces.

    We discussed what 'Box Selecting Left to Right' is before - this is an example, note how the selection is dynamic based on the box wholly emcompassing a line / surface/ body / component.

     

    To illustrate Jacants point about the automatic move handle NOT being attached to the center of the cylinder or hole as is necessary - see this...The move handle must be re-positioned as shown for an accurate move command.

     

    Now lets do the Move using the Create Patterns option checked. By selecting the blue rotation direction and typing 120, the software automatically assumes the quantity is 3. Lets also check the geometry afterwards.

     

    Hope this helps.

    Cheers.

     

     

     

    0
  • gary

    Thank you all for helping me on this and all the extra time you have taken from your own projects to help me with mine. I'm very grateful. With all your help and the drawings I finally realized I was mot selecting the all the parts of the thread. I haven't been able to get the hang of the boxing method to high light the thread so I had to rotate the view so I could highlight all parts of the thread so I could move it the 120 and 240 degrees to make the three threads. I have now printed the project and it fits the bottle.

    As I said above I could not figure out how to box the thread to get all the parts of it I had to do it piece by piece, but it worked

    Thank you all,

    Gary

    0
  • Jacant

    Using the 'Select' tool.

    With the 'Left Button Pressed' drag from top left to bottom right of the part you want, a solid 'Box' will be shown with all of the parts 'within' the box highlighted. If you start at the bottom right and drag to the top left a dotted 'box' will be shown with all of the parts that the box touches highlighted.

    There are other options available on how you can use the Select tool.

    (bottom right of the screen)

    0
  • tab...

    Gary

     

    You're welcome...

    Other techniques for selection are:

    Ctrl + MMB roll wheel to scan through the model , adding to the selection list with no or very minimal model rotation.

    Select a line / face etc and automatically ( power select ) or manually add all other similar lines / faces / holes / blend rads / chamfers etc with a single click. Select a face, and choose to select a protrusion of depression as well. Depending on the active part, everything identical /small or bigger ( eg holes) within the part or all of its parts owned by it may be selected.

    All these have their own niche application. The Ctrl +MMB roll wheel is something i use a lot as keep moving the model around is very time consuming and the Box selection L-R and R-L is a brilliant tool. Protrusion and Depression features so easily and dynamically selected as well - actually, i use it all.

    Ask anything else. - Yes, as Jacant says. the Lasso tool is very handy at times.

     

    Cheers.

    0
  • gary

    Tim, what is MMB?

    0
  • Jacant

    MMB. Middle Mouse Button (Scroll wheel)

    0
  • gary

    Well I was never good with acronyms or abbreviations and now I'm embarrassed.

    Thank you, Gary

    0

Please sign in to leave a comment.