Here is a list of all the postings David Jupp has made in our forums. Click on a thread name to jump to the thread.
|Thread: Learning CAD with Alibre Atom3D|
Nick - the PDF option in Atom can be set to use any 'virtual PDF printer' that you have installed. These do vary in quality/compatibility.
Like Jason I don't use the Publish option for 2D drawings, mainly because it introduces a slight scaling of the page to make room for header and footer at top and bottom of page - so your drawing won't truly be to scale.
Edited By David Jupp on 29/01/2019 15:03:59
Fire away Nick. You might want to take a quick skim through the whole thread first, in case your question has already been answered.
Roger - re-setting user profile will put things like grid and snap settings back to default values.
Roger, check to make sure that snap to grid is not enabled - snap will force things to grid intersections.
Sounds like it is working as it should - full detail of sketches are visible when in edit mode - a basic outline will show up outside edit mode if you have sketch visibility toggled on.
User Profile - The 'Home Window' (which displays after the initial 'splash screen' when you launch Atom3D) has Home, Explore and Utilities tabs. Click to select the Utilities tab, in the middle column (miscellaneous) there is a link 'reset user profile'.
Martin, are you saying that no sketch appears in the Design Explorer (left side of screen), when you exit sketch mode ? Does re-starting computer make any difference?
Maybe try re-setting user profile as mentioned a few posts previously...
John - if constraint tool is not showing at all, try re-setting your user profile. There is a link to do this on the Utilities tab of the Atom3D 'Home Window'.
After resetting profile, re-launch Atom.
If you still can't make the green plane show up with the 'show reference geometry' command, can you see the grey planes of the assembly workspace? If not - try 'toggle references' button (viewing and analysis tab of ribbon).
Mick - looks like you have placed a reference line in your sketch an used that as the axis for the helix. Click in the axis field in the helical cut dialogue, then click on the cylindrical face of the part (or the Z axis), so it is selected.
The helix path preview is in empty space, you can't perform a CUT in empty space, it has to cut from an existing solid - this where both orientation (axis), and direction (reverse or not) play a part.
If you are still struggling, e-mail me and we can have an on-line screen sharing session. Make sure to save your file - don't delete it, it will be fixable.
|Thread: Alibre Atom assy problem|
Yes - and you could extend that idea to use an arc in a sketch in the plate part, to position a 3D reference point, which could then be picked up in the assembly to position the sphere. That way you wouldn't even need the cut on the edge of the hole.
There's usually several ways to tackle the problem.
I typically resort to creating a cross section view (so I can see what is going on), then adjust a constraint by eye to fix sphere distance from plate. Low tech, but usually adequate.
Yes - should work if sphere size allows it to sit on the chamfered face. If the ball is larger, the tangency condition moves beyond the chamfer, and sphere will have to 'hover above' to fulfil it.
Of course the chamfer angle could be changed to suit, but it all gets a bit involved...
Thinking about it - a 45 degree chamfer on a particular hole size will only work with specific ball size range. Smaller ball will sit on inner edge of chamfer, larger ball will sit on outer edge.
Unfortunately there isn't a constraint type that works universally here.
Jason - standard (traditional) constraint tool is not available in Atom (except perhaps when editing existing constraints). So if this approach is possible in Atom, it'll require even more steps to achieve.
|Thread: Learning CAD with Alibre Atom3D|
Typically if OK isn't available, there is either a piece of data missing, or something incompatible has been entered. Not really obvious from the image what the issue might be - is Face 2 the cylindrical surface of the solid? Maybe try using Z-axis instead to define the axis for the helical.
If helix preview is appearing to the right, that is the wrong way - try checking the 'reverse' box.
Make sure to right click whilst cursor is touching the line, not the nodes at either end of the line, nor slightly away form the line (either will give a different right mouse context menu).
It might help to zoom in closer using your mouse wheel.
Edited By David Jupp on 22/01/2019 16:59:04
Jason - that is all down to design intent and what the user is trying to achieve. The differing approaches do give different results, as you have shown.
Nige - yet another way to tackle.
By default the extrude direction is normal to the starting plane, but it does not have to be. Here I have unchecked the 'Along Normal' box, this makes the field below available for specifying direction of extrusion. In this case I chose an edge of the existing geometry.
Here is the result
Nige, if you already have the 2D drawing open and have saved changes in the corresponding 3D part, you can force a 're-project views' in the drawing - just a little quicker than closing and re-opening (when you'll be prompted to re-project views anyway.
John - you seem to be confusing Sketches with 2D Drawings - they are not the same thing. Please don't delete dimensions from sketches, that makes the size no longer fixed and can lead to problems.
If you followed tutorial 3, fig 27 onwards deals with creating 2D drawings from your parts (these 2D files can be exported to DXF or DWG).
Edited By David Jupp on 21/01/2019 16:24:34
Edited By David Jupp on 21/01/2019 16:29:09
Nige - to expand a bit...
In the Design Explorer (on the left), find the sketch that defines the hole you wish to move, right click on the sketch name and choose Edit. This should re-open the sketch in editing mode. You can double click on any dimension to re-open it and modify.
You can also get into sketch edit mode by double clicking on the face that the sketch defines - though it isn't always obvious if you are on the 'correct side' of part for this to work.
As Tim mentioned, remember to generate to last feature (the button, drag the 'dog bone' down the design explorer, or press F5) after exiting sketch mode.
This is one of the biggest benefits of such a system - corrections or design changes are very simple to perform.
Edited By David Jupp on 21/01/2019 15:49:14
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