New user: Possible bug(?) and feature request in Cam Bam

[DanMiner]

I have been using an different commercial CAM processor that I have paid for but I am not happy with the way it works.  I'm looking for a good replacement and I think I may have discovered a bug in CamBam.  Plus I have a feature request.

1) Possible bug: see the attached files.  CamBam-01.PNG is a screen snapshot of the problem plus the (newest?) version number of CamBam.  Note the missing paths around the corner in the left and upper right of the photo.  I have attached the .cb file for this also.

2) Feature request: As far as I can determine from the documentation and reading on this forum, tabs are only available for 2D (and 2.5D) jobs but not 3D .STL jobs like my test example.  If this is correct PLEASE add tab support for all type of jobs.

[dh42]

Hello

1) Possible bug: see the attached files.  CamBam-01.PNG is a screen snapshot of the problem plus the (newest?) version number of CamBam.  Note the missing paths around the corner in the left and upper right of the photo.  I have attached the .cb file for this also.

Yep, there is missing toolpaths, it is a know behavior in some case with WL machining, it is explained in the doc

Boundary Margin    

The outer boundary shape, as determined by the Boundary Method setting, is extended by the distance give in the Boundary Margin setting.

It is recommended that a margin greater than 0 is used when using waterline profile methods in combination with Shape Outline boundary methods.

the problem when using a margin greater than 0 with Shape Outline is that you will get 2 concentric toolpaths instead only one. (or more, depending of the value for the boundary margin)

you can solve the problem by using another type of boundaries.

Boundary Method: selected shape
Boundary Shape IDs: the 3D shape itself (click on the |...| button in the line then select the 3D shape, or type it's ID number)
Boundary Margin: 0.1

2) Feature request: As far as I can determine from the documentation and reading on this forum, tabs are only available for 2D (and 2.5D) jobs but not 3D .STL jobs like my test example.  If this is correct PLEASE add tab support for all type of jobs.

They are easy to do ; extrude circles or rectangles as 3D "bar" place them where you want, and in the 3D machining op select both your 3D object and the "bar" objects (see example file) .. in this case I draw some polyrectangles, move and rotate them to the right XY position, then I select all rectangles then I extrude them ; To move the tabs at the wanted Z position, I used the Nummove plugin.

http://www.cambam.info/doc/dw/1.0.0/cad/draw-surface.html#extrude

http://www.atelier-des-fougeres.fr/Cambam/Aide/Plugins/NumMove.html

http://www.cambam.info/doc/dw/1.0.0/tutorials/3d-profile-back-face.html#3d-holding-tabs

an example of bar used as tabs here (the last video "Création des attaches 3D")
http://www.atelier-des-fougeres.fr/Cambam/Aide_V1/tutorials/Usinage3D.html

Note that this kind of shape is not designed to be done with 3D machining, it's a 2.5 part (pocket/profil/drill)

++
David