5-axis simultaneous, G-codes&post-processor?

[Damien D]

Hi,

I'm planning on building a 5axis plasma cutter similar to this one but with one more axis to tilt the torch head.

I'm thinking of starting from the existing maxkins kinematics (XYZBC) and then modify it to my needs.

Sorry if some questions seem 'stupid' but I'm quite new in CAM.. I'm googling around and try to understand how the 5axis interface works between CAM softwares and CNC controller (Machinekit).

What I'm struggling to understand is what will be the G-codes supported by Machinekit if I use the "maxkins" configuration?

Does Machinekit support RTCP (Rotating Tool Center Point) like in this video. If yes, what are the G-codes commands Machinekit can understand to handle RTCP?

I would need to know that to chose/configure the post-processor.

Or Maybe I should rather ask what post-processor (configuration) should I use to produce G-code that can be understood by Machinekit?

Thanks for your help,

/Damien

[schoo...@btinternet.com]

Not a subject I know much about, this seems to give the best overview of the kinematics.

http://linuxcnc.org/docs/ja/html/motion/5-axis-kinematics.html

I think the XYZAC example at the very end is nearest what you are proposing, with A and C rotating in relation to Z

The G codes remain the same, but the plane in which the axis operates may limit them.

Regards post processors, usually one for Mach is a good starting point, being generally compatible.

Quite a few CAM packages have linuxcnc posts, either in the package or as something available either from their forum or the linuxcnc forum. So check either before you choose a CAM or before you write your own.

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[Damien D]

Thanks for your answer :)

 

Not a subject I know much about, this seems to give the best overview of the kinematics.

http://linuxcnc.org/docs/ja/html/motion/5-axis-kinematics.html

I think the XYZAC example at the very end is nearest what you are proposing, with A and C rotating in relation to Z

I saw that page earlier, yes indeed that's something close to that I need.

The G codes remain the same, but the plane in which the axis operates may limit them.

Regards post processors, usually one for Mach is a good starting point, being generally compatible.

Ok thanks for the info. Do you/anyone know what specific G-code commands is Mach using for 5axis program?

 

Quite a few CAM packages have linuxcnc posts, either in the package or as something available either from their forum or the linuxcnc forum. So check either before you choose a CAM or before you write your own.

That's why I would like to know the list of G-codes command supported by Machinekit/LinuxCNC so I could figure out which posts can work. It seems that post processors usually state which specific G-codes commands they use to handle 5axis motions but if I don't know which G-code commands can be understood by Machinekit, it will be hard to find out which post processors can work.

[Bas de Bruijn]

On 18 Feb 2018, at 09:40, Damien D <damie...@gmail.com> wrote:

That's why I would like to know the list of G-codes command supported by Machinekit/LinuxCNC

They are here: http://www.machinekit.io/docs/index-user/#using-machinekit

[Damien D]

thanks,

If anyone has already use Machinekit with 5axis simultaneous (ie. not only 3+2axis) with TCP (Tool Center Point), I would be interested to know what CAM they have been using and which configuration they have used for kinematics :)

And if anyone has some idea about the cost for a 5axis simultaneous CAM software? <$1k?(I doubt), $1-5k?, $5-20k? more?

[Nate White]

Fusion 360 from autodesk is $2500 for a commercial licence for one year, and it can do 5-axis swarf and contour following.  They will also practically give it to you for personal use.  Otherwise, RhinoCAM is pretty good at $10k, then things travel into the stratosphere at $20k+ (check out hypermill...).  

For what is sounds like you want Fusion 360 has all the functionality you would need.