4-Axis RP5 with Bigtreetech Octopus Pro- How to make axis indipendent

 
Hi all,

I am developing a 4-axis foam cutter using a Bigtreetech Octopus Pro V1.0.1 F429 connected to a Raspberry PI5 via SPI.
I have amended the Config.txt file, the .hal and .ini, and named the axis as X, Y, A and U.

What happens is the following:
1- X and Y axis work fine.
2- If I try to move the A-axis, then both A and U move.
3- If I try to move just the U axis, then nothing happens.

What am I missing?

I have attached the board pin mapping, the Config.txt and my .hal and .ini files, which were modified from those in the remora "ConfigSamples"  directory.

Cheers
Pier


 

Hi Pier,

I just googled " 4 axis foam cutter Linuxcnc" and found a couple of example using " X Y U V " axis. ABC are angular axis and according to this post , they are always treated as angular.

I'd start with that.

Cheers,
Luca

Luca
Thank you for your response.
I have eventually managed to make it work.
It looks like the Octopus Pro board has Motor3 and Motor4 running in parallel.
I have used Motor0,1,3 and 5, defined XY;UV axis and it works.
Now I have 4 independent linear axis.