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Member postings for David Jupp

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
04/03/2019 07:45:02

No, Boolean tools are not available in AA3D.

With a bit of thought you might be able to shell the individual parts, removing any touching faces as part of the shell command. You might have to get a bit more creative with extrude cuts (after shell) if only part of a face should be removed. Depends a lot on the specific detail of your design.

Thread: Plastic Balls in Bearings?
24/02/2019 13:05:47

Plastic races with ceramic balls are used where water ingress is expected.

Metal races with ceramic balls are used in some high end bearings - amongst other advantages there is significant weight reduction.

Thread: Learning CAD with Alibre Atom3D
24/02/2019 11:50:27

David,

Note that 'Publish to PDF' from 3D workspace produces a 3D PDF - Microsoft Reader doesn't support 3D PDF, so the page will appear blank. It must be viewed in Adobe Acrobat (Reader). The 3D PDF publishing is coded into Alibre Design / Alibre Atom, it doesn't use any functionality from virtual PDF printers you may have installed.

If you just need a 2D image of 3D part in a PDF, you can Print from the 3D workspace (basically a screenshot) and select any PDF virtual printer. This method does use your installed PDF virtual printer.

24/02/2019 08:36:18

You can create your own colour scheme if desired, you aren't limited to the provided ones.

23/02/2019 15:08:03

The licence is not time limited. It should last indefinitely - realistically that means until you move to an operating system that your build of Atom3D isn't supported on.

23/02/2019 10:43:07

Atom3D will still work as a viewer when the trial period expires. So you'll still be able to access your files but not edit them.

Of course nothing to stop you from producing DXFs or PDFs, just to be doubly safe. You could also export your 3D designs as STEP, which pretty much all 3D CAD systems can import.

21/02/2019 20:00:05

Tom, you can post Atom3D files to the Alibre User Forum. To set up an account there so you can post you will need an access code - either PM me or mail support@alibre.com to get the code.

20/02/2019 19:36:56

Tom, linkages like crank & piston can be made to work as in real life.

Atom3D doesn't have a 'Cam & Follower' constraint.

Part deformation, as others have responded is not supported.

19/02/2019 07:36:52

This video was produced for Alibre Design, not Atom3D - but it illustrates how this works. The colour scheme used isn't quite the current standard. As the video states - best practice is to always fully define sketches, but this isn't forced on you.

I've just tried on my own system, it appears that you can do the following in Atom3D (my system also runs Alibre Design, so may not be entirely representative - would be good if somebody can check in Atom3D).

  • Ctrl + Shift + N toggles the key for DoF colours (bottom right of screen in sketch mode)
  • Ctrl + Shift + U toggles DoF callouts in the sketch - these make things even more obvious, but do clutter the sketch somewhat.
16/02/2019 18:45:13

You can change the 'heal tolerance' value - but tat doesn't help if you have multiple loops on sketch.

Personally I find snap to grid a pain - but it may be helpful for some.

15/02/2019 18:42:04

For more detail about 'closed' profiles - review this video.

Thread: Problems with NVR switch
15/02/2019 08:31:36

With a different make of contactor, I've had problems with start switch that previously worked no longer doing so. After much messing around I had to move contactor slightly towards the enclosure lid (and the start button), by placing washers between it and the backplate.   Sounds like having to press the start button in a certain way could be the beginning of a similar issue.

Edited By David Jupp on 15/02/2019 08:32:21

Edited By David Jupp on 15/02/2019 08:32:43

Thread: Alibre Design Competition
13/02/2019 19:36:53

Some of you may have seen latest newsletter from Alibre today - David Milway won 1st place in the competition (wonder if that was anything to do with visitors from here voting....).

 

Edited By David Jupp on 13/02/2019 19:37:48

Thread: Buying lathes direct from China
13/02/2019 16:29:52

As importer you are likely to be responsible for ensuring compliance of the equipment with any relevant EU Directives.

You'll be charged a processing fee / handling charge by whoever collects the VAT and import duty, and if unlucky could also be charged storage if it gets held up whilst in their facility.

Payment costs - exchange charges, rate movements, possible intermediary bank charges.

Be clear about whose insurance is covering loss or damage en-route. If supplied FOB, it's yours as soon as it's loaded on the ship.

Thread: Learning CAD with Alibre Atom3D
12/02/2019 15:10:36

Mick - I'd add that in each of Jason's examples, an alternative approach would have been a single slot profile in the sketch, extrude cut that, then feature pattern to get the required number and spacing of slots.

There is no 'right' or 'wrong' method - using feature patterns keeps the sketch simpler, hence easier to edit.

08/02/2019 10:48:35

Boring technical explanation - communication between your PC and the Licensing server involves an 'offset' parameter. This changes regularly and is remembered on your computer. Should the offset value get 'out of synch', all communication becomes garbled. Deleting the local licence copy (which is what that article details an easy way of doing) re-sets communications and establishes a new offset value for future communications.

08/02/2019 10:24:19

John - fear not. This article will show you how to fix it.

You will need to re-enter your activation code - if you can't find it, contact support (they can find it from the details used when setting up the trial).

Edited By David Jupp on 08/02/2019 10:27:07

Thread: Where to begin?
06/02/2019 09:07:58

Best place to start is to find a package which you can work with - but remember it may not be what you end up using if you get a job in the field. The principles are widely shared across many of the available packages, but the detail of how they are implemented will vary. Once you build some basic skills, look at others' work to pick up the tips and tricks of efficient design.

Be aware of some broad distinctions ;-

Solid Modelling vs. Surface Modelling , relates to basic approach of how objects are defined (there are some packages which offer both approaches, but some are tied to solids only for example).

History based vs. non-historical ;- History based is more common.

You started by mentioning 3D Design but them jumped to using CNC machines, a related but distinct field. For CNC machining you need a basic understanding of G-code, then learn about or use CAM software. I've found CNCcookbook a good starting place.

Thread: Learning CAD with Alibre Atom3D
04/02/2019 17:45:38

Mick - the first step in creating any sketch is to choose a plane OR a flat face to sketch on. So in this case, and assuming the top of the head if indeed flat, select the head top face, enter 2D sketch mode, place 12mm dia circle and constrain concentric to one of the existing holes.

If the top of the head isn't flat, you'll have to add a new plane at a suitable height to start your counterbore from (that could be just above the top of the hole, or it could be at the level you want the bottom of the counterbore to be at - the direction of cut will be opposite for these 2 options.

04/02/2019 13:20:27

Ken - perhaps you missed out this step (my bold);-

Change the right hand edge of the triangle
to a reference figure
(this option is found
under the right click menu), then extend the
shape with the line tool and set the distance
to 0.2mm as shown in Fig 45.

A reference figure is like a 'construction line' - it is ignored for the actual extrusion (or other feature).

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