5 axis kinematics modules

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11 Oct 2019 09:14 - 11 Oct 2019 09:14 #147687 by ross_dev
Hi

I work as a research engineer developing a machine that uses 5 axis kinematics the same as a "swivel head" type setup (see video below for an example, though not our machine) and would like to use LinuxCNC to drive it, as it has a great feature set and reputation.



I note that LinuxCNC features a 5 axis kinematics module and that the documentation specifically references swivel table type 5 axis. Please can you advise if the same kinematics module will cover the swivel head type setup as illustrated in the video (often referred to as a B/C head), or if not, whether you are aware of a community written set of kinematics that will cover this type?

Regards

Ross
Last edit: 11 Oct 2019 09:14 by ross_dev.

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11 Oct 2019 09:32 #147688 by tommylight
There should be something for any 5 axis setup here, be it included with Linuxcnc or modified by some of the users on this forum.
In any case, from reading here, it is not dificult to modify the kinematics module to fit your needs.
You should wait for someone with more experience in that area to reply.
Regards,
Tom.

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11 Oct 2019 14:47 #147705 by ross_dev
Replied by ross_dev on topic 5 axis kinematics modules
Hi Tom

Thanks for the response! I will wait and see if there are any further replies as suggested and have a dig for topics on kinematics modification.

Regards
Ross

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11 Oct 2019 15:04 #147707 by tommylight
www.google.com/search?source=hp&ei=jZmgX...R7BXwQ4dUDCAU&uact=5

www.google.com/search?ei=qJmgXdr3Fcy1sAf..._mBZ8Q4dUDCAo&uact=5

In the meantime see if there is something interesting there, one is for modified kinematics and the other for 5 axis kinematics, all only on Linuxcnc site and forum.
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12 Oct 2019 07:52 #147729 by pl7i92
Replied by pl7i92 on topic 5 axis kinematics modules
the mashine in the video is straight standard so it will fit the standard setup installation

if the mashine is already build you can modifie the kinetics to your need
if you are building it just keep as centerd as posible and you only got the 3 offset parameters
or the 6 if you are not centerd and need generickins
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16 Oct 2019 11:12 #147988 by ross_dev
Replied by ross_dev on topic 5 axis kinematics modules
Thank you, as advised it seems the xyzbc kinematics match our needs.

Cheers
RD

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22 Oct 2019 16:24 #148547 by andypugh
Replied by andypugh on topic 5 axis kinematics modules
Have you seen the sample config:
sim-axis-vismach-5-axis-Bridge-mill?

It is a simulated machine pretty much identical to your proposed machine, so you will be able to get a good idea of how LinuxCNC would work with your real machine.

Attachments:

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23 Oct 2019 10:41 #148593 by ross_dev
Replied by ross_dev on topic 5 axis kinematics modules
Hi Andy

Yes we picked that up the other day, as you say its exactly what we are after.

I noticed that some of the axes freeze when you first start the simulation, and then will eventually start moving. Is this a known issue with that particular vismach script?

Cheers
RD

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27 Oct 2019 23:27 #148939 by andypugh
Replied by andypugh on topic 5 axis kinematics modules
It waits for a simulated "spindle at speed" signal. Is that what you are seeing?

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29 Oct 2019 13:49 #149048 by ross_dev
Replied by ross_dev on topic 5 axis kinematics modules
Hi Andy

Looks like a rookie error, I had it in joint mode! It works fine once in world mode. Cheers!

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