Author Topic: Chess Pieces  (Read 211 times)

Offline RUSTY

  • Droid
  • **
  • Posts: 64
    • View Profile
Chess Pieces
« on: May 23, 2020, 12:58:27 pm »
 Could anyone suggest chess pieces that C.B. can machine by machining one half at a time then turn over for the other.  Thanks for any ideas. 
Rusty

Offline EddyCurrent

  • CNC Jedi
  • *****
  • Posts: 4333
    • View Profile
Re: Chess Pieces
« Reply #1 on: May 23, 2020, 15:36:19 pm »
Not exactly what you mean; https://www.ameede.com/cnc-chess-set-plans/

Maybe you could also try the lathe aspect of CamBam.

Another idea could be to machine two halves of a mould then cast the pieces.
« Last Edit: May 23, 2020, 15:40:26 pm by EddyCurrent »
Made in England

Offline RUSTY

  • Droid
  • **
  • Posts: 64
    • View Profile
Re: Chess Pieces
« Reply #2 on: May 24, 2020, 11:10:59 am »
Thanks Eddy for reply,
                          I am trying to be familiar with the back face culling, thought this might be a way of learning how to do it. Most files seem to be for STL 3D Printers but by importing the chess object and positioning it on its side I can machine the top half o.k. but how do you machine the bottom half. Obliviously the piece of wood has to be turned over and in the same position. If both sides are the same no problem but usually there is a front and back side. Thanks for any help. I cannot seem to load an attachment at moment other wise I would show you.
Rusty
« Last Edit: May 24, 2020, 11:13:02 am by RUSTY »

Offline EddyCurrent

  • CNC Jedi
  • *****
  • Posts: 4333
    • View Profile
Re: Chess Pieces
« Reply #3 on: May 24, 2020, 13:12:53 pm »
Rusty,

I've attrached a file of how I would approach it.
I like to keep it simple and step by step so I know what's going on.

The 3D MOps I used are not complete, they are just to show the procedure which basically involves keeping the centre line along one axis and using alignment pins to allow flipping of the stock material.

There are no holding tabs available for 3D MOps so you will have to create some solids and move them into poition to act as tabs.
If you didn't want to mess with the tabs you could reduce the depth of cut on each side to leave a thin central web around the stl attaching it to the stock material. This could be easily cut away if you are using wood.

I had to reduce the stl mesh in order to keep the file size down, you may want to keep the stl files as they are.

« Last Edit: May 24, 2020, 17:35:30 pm by EddyCurrent »
Made in England

Offline RUSTY

  • Droid
  • **
  • Posts: 64
    • View Profile
Re: Chess Pieces
« Reply #4 on: May 25, 2020, 08:59:52 am »
Thanks Eddy,
                    That`s most helpful , may of been easier to position using snap to grid and some where I saw an add on for 3d arrows.  So to conclude one can import suitable stl 3d files for printer and  position in the horizontal position and carry out this procedure. Maybe a lot quicker than a printer.  Thanks again another step forward. 
Rusty
 

Offline EddyCurrent

  • CNC Jedi
  • *****
  • Posts: 4333
    • View Profile
Re: Chess Pieces
« Reply #5 on: May 25, 2020, 09:17:07 am »
This is the plugin I used; http://www.atelier-des-fougeres.fr/Cambam/Aide/Plugins/NumMove.html

Also, Edit->Transform->Align

I would certainly not use snap to grid, that could lead things astray. The centre line along the X axis (you could use Y instead) is the most important thing and is the datum.
« Last Edit: May 25, 2020, 18:53:06 pm by EddyCurrent »
Made in England

Offline RUSTY

  • Droid
  • **
  • Posts: 64
    • View Profile
Re: Chess Pieces
« Reply #6 on: May 25, 2020, 19:08:42 pm »
Thanks Eddy,
                  The numerical move plugin really works well, how ever did I do without it.
             One can accurately align the object, thanks again Rusty.

Offline dh42

  • Administrator
  • CNC Jedi
  • *****
  • Posts: 5960
    • View Profile
    • Cambam French Doc
Re: Chess Pieces
« Reply #7 on: May 25, 2020, 19:23:42 pm »
If you understand som french ?

cambam
http://www.atelier-des-fougeres.fr/Cambam/Aide_V1/tutorials/Usinage3D.html

machining
http://www.atelier-des-fougeres.fr/Cambam/Aide_V1/tutorials/Usinage3D_2.html

and in english but with a 4th axis and with 4 faces machining
https://cambamcnc.com/forum/index.php?topic=1774.msg10143#msg10143

Both use back face option in the 3D mop (and not back face culling that is another thing)

the back face option allow to use only one 3D model to do both faces.

++
David
« Last Edit: May 25, 2020, 19:28:24 pm by dh42 »