Tool-Library: Cutting Edge Angle

Here's the place for discussion related to CAM/CNC and the development of the Path module.
schnebeck
Posts: 124
Joined: Thu Jun 22, 2017 8:04 pm

Tool-Library: Cutting Edge Angle

Postby schnebeck » Wed Jan 31, 2018 6:40 pm

Hiho,

I read in the wiki that you must enter a Cutting Edge Angle of 180° for a tool otherwise the simulation can crash.
But I can only enter a 2 digit number <= 90° :?:
I can enter "180°" in the Toolcontroller-Tool-Editor, but when I press enter its changed to 90°

So, any new info about this?

Bye

Thorsten

--
OS: Ubuntu 14.04.5 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.13190 (Git)
Build type: None
Branch: master
Hash: 70399e6c9c6506a6eb7849c6835557b40adb1db0
Python version: 2.7.6
Qt version: 4.8.6
Coin version: 4.0.0a
OCC version: 7.1.0
Locale: German/Germany (de_DE)
chrisb
Posts: 22440
Joined: Tue Mar 17, 2015 9:14 am

Re: Tool-Library: Cutting Edge Angle

Postby chrisb » Wed Jan 31, 2018 7:09 pm

It's one of the recent changes that mlampert or sliptonic made. They mentioned it here in the forum.
User avatar
sliptonic
Posts: 1688
Joined: Tue Oct 25, 2011 10:46 pm

Re: Tool-Library: Cutting Edge Angle

Postby sliptonic » Wed Jan 31, 2018 8:04 pm

schnebeck wrote:
Wed Jan 31, 2018 6:40 pm
I read in the wiki that you must enter a Cutting Edge Angle of 180° for a tool otherwise the simulation can crash.
But I can only enter a 2 digit number <= 90° :?:
I can enter "180°" in the Toolcontroller-Tool-Editor, but when I press enter its changed to 90°
What does a tool with a 180 degree cutting angle look like?
chrisb
Posts: 22440
Joined: Tue Mar 17, 2015 9:14 am

Re: Tool-Library: Cutting Edge Angle

Postby chrisb » Wed Jan 31, 2018 9:38 pm

sliptonic wrote:
Wed Jan 31, 2018 8:04 pm
What does a tool with a 180 degree cutting angle look like?
If we look at the cutting angle of a drill it has - at least overhere - a most common cutting angle of 118°. This means the cutting angle has its center in the middle of the tool tip and measures to both sides.
An angle of 180° would be an end mill.
herbk
Posts: 1737
Joined: Mon Nov 03, 2014 3:45 pm
Location: Windsbach, Bavarya (Germany)

Re: Tool-Library: Cutting Edge Angle

Postby herbk » Thu Feb 01, 2018 6:50 am

Hi Chris,
but it's, like you say, a drill... ;)
The angle you are talking about is called "spitzenwinkel" in german, translated to nose- or point- angle by google. :)
Gruß Herbert
chrisb
Posts: 22440
Joined: Tue Mar 17, 2015 9:14 am

Re: Tool-Library: Cutting Edge Angle

Postby chrisb » Thu Feb 01, 2018 8:46 am

You are right. I forgot in my last post: All we need is an appropriate image. We have discussed this here before, I will look for the topic.
chrisb
Posts: 22440
Joined: Tue Mar 17, 2015 9:14 am

Re: Tool-Library: Cutting Edge Angle

Postby chrisb » Thu Feb 01, 2018 9:05 am

Here is one of the topics including a FreeCAD TechDraw image: https://forum.freecadweb.org/viewtopic. ... 17#p186875
chrisb
Posts: 22440
Joined: Tue Mar 17, 2015 9:14 am

Re: Tool-Library: Cutting Edge Angle

Postby chrisb » Thu Feb 01, 2018 9:14 am

User avatar
sliptonic
Posts: 1688
Joined: Tue Oct 25, 2011 10:46 pm

Re: Tool-Library: Cutting Edge Angle

Postby sliptonic » Thu Feb 01, 2018 4:25 pm

Clearly this issue keeps coming up again and again. We need to stop mucking about with shovels and rakes, get into a bulldozer and dig a solution out once and for all. This is probably going to be a significant piece of development work which means 0.18 at the earliest.

I've created a new feature issue in mantis for this: https://freecadweb.org/tracker/view.php?id=3336 I set priority high but left it unassigned for now. If someone doesn't want to own it outright from the beginning, we might see if all or part of it is appropriate for a GSoC project.

Please get used to this issue number and tag any other forum threads with it. Add comments, design ideas, and links to external references.

'Old number 3336' might be with us for a while.
chrisb
Posts: 22440
Joined: Tue Mar 17, 2015 9:14 am

Re: Tool-Library: Cutting Edge Angle

Postby chrisb » Thu Feb 01, 2018 6:53 pm

I bookmarked it in my to-be-tracked folder.