Path Profile Faces: 4th-axis integration

Here's the place for discussion related to CAM/CNC and the development of the Path module.
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Russ4262
Posts: 360
Joined: Sat Jun 30, 2018 3:22 pm

Re: Path Profile Faces: 4th-axis integration

Postby Russ4262 » Mon Jun 24, 2019 5:23 pm

kkremitzki wrote:
Mon Jun 24, 2019 4:14 pm
Be careful offering such a solution as a workaround. If you put a file in a system-managed location it can break the system's ability to manage the FreeCAD package. Whenever the update comes around for the package it will want to install a file to a location that already has something there and will fail.
Thanks for the insight. So, in the temporary solution offered above, the user would need to revert the changes before performing a system initiated update for FreeCAD. … Or, not attempt the solution at all because it might not be an actual, temporary solution.

I appreciate the info,
Russ
Erich Schulz
Posts: 141
Joined: Tue May 07, 2019 10:50 pm
Location: Brisbane, Australia

Re: Path Profile Faces: 4th-axis integration

Postby Erich Schulz » Tue Jun 25, 2019 2:50 am

thanks Russ

I am confortable with git and unix (but have never really used make)

I can give that a go but I was hoping that the build would be fixed... I'll see what happens in next day or two
somuch245
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Joined: Sat Feb 08, 2020 7:01 am

Re: Path Profile Faces: 4th-axis integration

Postby somuch245 » Sat Feb 08, 2020 7:39 am

I'm trying to make wooden planter using 4 axis cnc router and I came across this software. I read that this software 4 axis is in experiment phase, what's the problem in actual run when X axis can't simulatenously move with Y axis?

I'm trying to make something like this
Image

Can this software make something like this properly?
If it can, how long it takes usually to make one? The planter inner diameter size is about 8cm (around 3.2")

Thanks!
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Russ4262
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Re: Path Profile Faces: 4th-axis integration

Postby Russ4262 » Tue Feb 11, 2020 7:36 am

Welcome to the FreeCAD Path forum, Somuch245! We would be glad to have another FreeCAD user.

As for your questions, I don't think the 4th axis capabilities of the current 0.19_pre have had much testing. I have been the primary developer for the current 4th axis implementation and I don't even own a 4th axis machine! LOL. I do know there are users here in the forums that have 4th axis machines. I'm always up for technical and procedural input from experienced CNC users.

Looking at your image, as a novice in the field of CNC, I don't really have a good idea of a general work flow to produce such wooden pots. If I had a FreeCAD file with something similar to work and test with, I could better adapt the current 4th axis to fit the needs of 4th axis users. Looking at the pots, I would say the milling approaches would not be the same for each pot. The one on the left leads me to use the current 3D Surface multi-pass operation. The two on the right make me think one would need to create the simple design path, and then replicate it in an array fashion around the desired axis of rotation. I don't think FreeCAD is ready for this last approach - 4th axis is still in its infancy within the Path WB.
somuch245 wrote:
Sat Feb 08, 2020 7:39 am
I'm trying to make wooden planter using 4 axis cnc router and I came across this software. I read that this software 4 axis is in experiment phase, what's the problem in actual run when X axis can't simulatenously move with Y axis?

I'm trying to make something like this
...

Can this software make something like this properly?
If it can, how long it takes usually to make one? The planter inner diameter size is about 8cm (around 3.2")

Thanks!
Glad you joined the forum. Feel free to post additional usage questions. The FreeCAD Wiki is quite helpful, as well as FreeCAD tutorial videos on YouTube.

Russ
adamLange
Posts: 49
Joined: Sun May 24, 2015 12:15 am

Re: Path Profile Faces: 4th-axis integration

Postby adamLange » Tue Feb 25, 2020 5:26 am

Hi Russ, Hi Somuch245,

I think I can help with making toolpaths for those wooden vases.

I've been working on an inverse kinematics solver and I've successfully used it to generate gcode for my 5-axis machine. There's a thread about the development it here: https://forum.freecadweb.org/viewtopic. ... cs#p367597 and a hackaday page here: https://hackaday.io/project/169499-solv ... h-modelica

The inverse kinematics solver can solve for n-axis simultaneous motion. The inverse kinematics solver is a server. To use it, you feed it tool targets with the tool tip position and tool orientation like these: Image

The inverse kinematics solves for the machine axis positions necessary to put the tool on the tool target and sends them back to the client. The inverse kinematics solver can be easily customized for any machine.

I'd love to help integrate this solver into the freecad path toolbench.

Adam
m0n5t3r
Posts: 97
Joined: Fri Feb 03, 2017 2:55 pm

Re: Path Profile Faces: 4th-axis integration

Postby m0n5t3r » Tue Feb 25, 2020 7:01 am

Those pots look very much 3d printed to me :)

Would it be possible to make them on a 4 axis router? maybe the leftmost one, but the center and right one would be really tedious (lots of features, deep trenches requiring most likely one of those conical endmills and possibly 2 or 3 tools so it doesn't take a month) and you'd need to find a wood that's as isotropic as possible (so some really dense hardwood not prone to chipping, or something resin stabilized - kinda hard to do on such a large object unless you machine out the interior first).
RatonLaveur
Posts: 463
Joined: Wed Mar 27, 2019 10:45 am

Re: Path Profile Faces: 4th-axis integration

Postby RatonLaveur » Tue Feb 25, 2020 6:07 pm

These vases are cool and all but indeed only with a conical end mill for 4 axis. 5 axis necessary otherwise.

But I am sure i cannot be the only one that for the second time on these forums some enterprising soul is proposing a real shot at 5 axis integration. I mean this is some real heavy stuff there. Need some noise about it ;)