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by RatonLaveur
Sun Aug 09, 2020 4:35 pm
Forum: Path/CAM
Topic: Circle milled by using four arcs?
Replies: 16
Views: 466

Re: Circle milled by using four arcs?

Gene you're correct about the accuracy parameter being important only for sharp corners. Actually, when commanding exact corners is where you take the best advantage of this. I say advantage because that's when most CNC handle the corner exactly as intended (the faster your commanded feedrate, the m...
by RatonLaveur
Fri Aug 07, 2020 6:18 pm
Forum: Path/CAM
Topic: Circle milled by using four arcs?
Replies: 16
Views: 466

Re: Circle milled by using four arcs?

Why is LinuxCNC even pausing between 2 arcs? This makes no sense to me. Theoretically the meeting point of the arcs are 2 short lines with an angle of 180° (or something like 179.999999°). If LinuxCNC has a look-ahead buffer, there should be no slow down at all. Even with G61/64. Your questions are...
by RatonLaveur
Thu Aug 06, 2020 3:29 pm
Forum: Path/CAM
Topic: Circle milled by using four arcs?
Replies: 16
Views: 466

Re: Circle milled by using four arcs?

Hello gents, @OP: regarding the machine slowing down at inter-arc junctions, that can be configured in the CNC directly depending on your hardware. The key parameters to look after are jerks, lookaheads, behavior when not using exact stop mode. @freman: would you elaborate on the accuracy issue? Whe...
by RatonLaveur
Fri Jul 31, 2020 8:52 pm
Forum: Path/CAM
Topic: 2-Axis CNC Mill- Creating X Y only tool-path that does not cut into part
Replies: 8
Views: 278

Re: 2-Axis CNC Mill- Creating X Y only tool-path that does not cut into part

Then that's super easy: change your postprocessor to remove all Z arguments.
by RatonLaveur
Thu Jul 30, 2020 5:45 am
Forum: Open discussion
Topic: offset tool in sketcher (not implemented yet)
Replies: 4
Views: 222

Re: offset tool in sketcher (not implemented yet)

I think there is a confusion, I have not heard of Offset for Sketcher, however 2D Offset was released for Draft and Offset for Part. Perhaps that is what you mean?
by RatonLaveur
Fri Jul 24, 2020 11:16 pm
Forum: Path/CAM
Topic: Step towards 5-axis milling: 3+2 milling
Replies: 2
Views: 192

Re: Step towards 5-axis milling: 3+2 milling

In a professional 5 axis CAM, you set Local Coordinate Systems as orientation references. That's a workpiece reference. Then all operations can be oriented rather seamlessly. What happens is I probe my part in the machine in a way that sets exactly the workpiece reference and then everything is hand...
by RatonLaveur
Fri Jul 24, 2020 5:22 pm
Forum: FEM
Topic: A suggestion for a new FEM mesh GMsh icon
Replies: 35
Views: 1302

Re: A suggestion for a new FEM mesh GMsh icon

The way this is going is interesting. The drop-down menu on Solvers and on Mesh would make a lot of sense regarding readability. Even new users would understand a bit a better. Depending, this could even be applied to equations and equations-specific BCs. Ultimately it could look squeaky clean like ...
by RatonLaveur
Thu Jul 23, 2020 9:20 am
Forum: FEM
Topic: Elmer Static current equation
Replies: 31
Views: 1064

Re: Elmer Static current equation

I actually like this, kindof like a config file for elmer with the default values. May I ask, why you do not want to edit the .sif file after the fact? there is still the EDIT button in the SolverElmer Task pannel (granted at the moment it does not work :) ). But i wonder if there is a technical rea...
by RatonLaveur
Wed Jul 22, 2020 9:44 pm
Forum: FEM
Topic: Modelica
Replies: 35
Views: 6532

Re: Modelica

I'm sure developers like adamLange would be interested too, his n-axis inverse kinematics solver in modelica, he has been using it to generate FreeCAD Path G-code for his 5 axis machine...https://forum.freecadweb.org/viewtopic.php?f=15&t=43224 He today released a very detailed step by step tutorial ...
by RatonLaveur
Wed Jul 22, 2020 5:31 pm
Forum: Path/CAM
Topic: GRBL new post processor with drill cycles G81..G83
Replies: 77
Views: 10755

Re: GRBL new post processor with drill cycles G81..G83

It is necessary to at least bring the flutes back over the surface of the material so they can evacuate chips for example. Actually there is some thought that this is a bad idea. The drill flutes do a pretty good job of evacuating chips if pulled close to the surface, and pulling the drill bit all ...

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