Help: no dressup, no party.

Here's the place for discussion related to CAM/CNC and the development of the Path module.
chrisb
Posts: 29041
Joined: Tue Mar 17, 2015 9:14 am

Re: Help: no dressup, no party.

Postby chrisb » Sat Nov 21, 2020 9:19 pm

How about that:
Snip macro screenshot-7130c3.png
Snip macro screenshot-7130c3.png (3.63 KiB) Viewed 244 times
Attachments
test-stator-magnets_cb.FCStd
(81.07 KiB) Downloaded 12 times
A Sketcher Lecture with in-depth information is available in English, auf deutsch, en français, en español.
Giulio Buccini
Posts: 186
Joined: Fri Aug 26, 2016 9:07 pm

Re: Help: no dressup, no party.

Postby Giulio Buccini » Sat Nov 21, 2020 9:43 pm

@Russell
@Chris
voto.gif
voto.gif (7.08 KiB) Viewed 235 times
m0n5t3r
Posts: 121
Joined: Fri Feb 03, 2017 2:55 pm

Re: Help: no dressup, no party.

Postby m0n5t3r » Sat Nov 21, 2020 9:55 pm

... and here's a more parametric way to do it (just set the angle in the spreadsheet and everything auto-updates) - went for the simplest corner relief (equivalent to what dogbone calls "tbone short edge", I think)
Attachments
stator-magnets.FCStd
(60.98 KiB) Downloaded 13 times
herbk
Posts: 1950
Joined: Mon Nov 03, 2014 3:45 pm
Location: Windsbach, Bavarya (Germany)

Re: Help: no dressup, no party.

Postby herbk » Sat Nov 21, 2020 9:55 pm

Hi Guido,
Giulio Buccini wrote:
Sat Nov 21, 2020 8:11 pm
Even If I manually "cut" the corners by using some cylinders and a boolean-cut operation, the resulting path is far from being optimal... :(
if you make "dogbones" this way, you have to make the entry to the pocket bigger as the tooldiameter to. :)
dogbone_2.jpg
dogbone_2.jpg (35.7 KiB) Viewed 230 times
Gruß Herbert
Giulio Buccini
Posts: 186
Joined: Fri Aug 26, 2016 9:07 pm

Re: Help: no dressup, no party.

Postby Giulio Buccini » Sat Nov 21, 2020 10:12 pm

m0n5t3r wrote:
Sat Nov 21, 2020 9:55 pm
... and here's a more parametric way to do it (just set the angle in the spreadsheet and everything auto-updates) - went for the simplest corner relief (equivalent to what dogbone calls "tbone short edge", I think)
Uh!
Niceeeee!
(I think I got it, but this will take me a week to understand it well :lol: )
Giulio Buccini
Posts: 186
Joined: Fri Aug 26, 2016 9:07 pm

Re: Help: no dressup, no party.

Postby Giulio Buccini » Sat Nov 21, 2020 10:13 pm

herbk wrote:
Sat Nov 21, 2020 9:55 pm
Hi Guido,
if you make "dogbones" this way, you have to make the entry to the pocket bigger as the tooldiameter to. :)
Yeah, you're right. I realized that after posting the drawing... :oops:
chrisb
Posts: 29041
Joined: Tue Mar 17, 2015 9:14 am

Re: Help: no dressup, no party.

Postby chrisb » Sat Nov 21, 2020 10:54 pm

If you want to do it in a certain angle, you can do it like this. You simply have to change the angle constraint.
The construction diameter assures that the opening is exactly the half circle, so that nothing is lost: making it the opening wider wouldn't remove enough material, making it narrower would require a hole more off than necessary which would take away too much material.
Attachments
SnipScreenshot-4aaaf8.png
SnipScreenshot-4aaaf8.png (17.22 KiB) Viewed 179 times
A Sketcher Lecture with in-depth information is available in English, auf deutsch, en français, en español.
Giulio Buccini
Posts: 186
Joined: Fri Aug 26, 2016 9:07 pm

Re: Help: no dressup, no party.

Postby Giulio Buccini » Sun Nov 22, 2020 11:22 am

Thanks! ;)

With this method there is a little bit less material to be removed, if compared to your previous proposal.

It can be an advantage when one has to produce hundred of pieces. In my case I only have to mill few exemplars, so the two approaches are more or less equivalent.
chrisb
Posts: 29041
Joined: Tue Mar 17, 2015 9:14 am

Re: Help: no dressup, no party.

Postby chrisb » Sun Nov 22, 2020 2:06 pm

Giulio Buccini wrote:
Sun Nov 22, 2020 11:22 am
so the two approaches are more or less equivalent.
That's what I would have guessed, I did it rather to fully understand the problem dogbone myself. The last solution has the advantage that your are free to decide where to leave more material, at the end or at the sides; perhaps influenced by other mechanical conditions.
A Sketcher Lecture with in-depth information is available in English, auf deutsch, en français, en español.
User avatar
sliptonic
Posts: 1985
Joined: Tue Oct 25, 2011 10:46 pm
Location: Columbia, Missouri
Contact:

Re: Help: no dressup, no party.

Postby sliptonic » Sun Nov 22, 2020 3:26 pm

I haven't tried this myself but could you just extend the arc on both ends by a tiny straight segment. Just enough so the dogbone dressup has G1 moves to work with?