Can I set up the Ruida controller to slave the U-axis to the Y axis for driving two y-axis servos?
I have two stepper motor on the y-axis. I want the Y-axis to drive one side and the U-axis to drive the other. So I would have to slave the U-axis to the Y-axis. I have seen this done on other controllers. But for the life of me I cannot find the capability on the Ruida. Maybe its not there:( Thanks,
I don’t think that’s an option… I’ve worked with these a while and haven’t seen anyone come up with a solution to this.
There are also variations with the Ruida family… such as a 6445/6442 or some other model. And your profile says you use a grbl machine… 
I’d assume you’d drive two motor drivers…
Yes I think you are correct. I did get the two steppers to work by mirroring the stepper wires.
I am building a 600x400 laser system using the Ruida controller. I have a little Atomstack that I started with. The build has been a quite a learning experience!!!
My china blue has a single motor and dual ends, so it turns a pair of shafts that goes to pulleys on the Y axes…
Which Ruida are you going to use?
How much power are you planning to have available?
Post some photos of the build… 
The Ruida is the 6445S and I have an 80W laser.
I have everything working other than the homing. I just cannot seem to get it to work. I have the limit switches on the upper right of the bed. I can get the head to move around freely, but when I try and home it moves very slowly for a few cm then just stops and I cannot move below or to the left of that point. I am sure I am just confused on the quadrant or something like that.
Lauren
I would start with home function.
Start at the beginning, home has to function… the following are controller settings…
From Lightburn perspective you have to select which quadrant you are using…
Your quadrant is set in the device settings… the origin… mine is set to the 4th quadrant. It identifies where your home location is and that relates to the quadrant.
The gui also shows the size of your work area.
The quadrant system is show with the origin at 0, 0.
If you home at the top/right then you use quadrant III…
This is quadrant IV which is what I use… mine homes to the top/left.
Hope this helps …
The homing is all fixed, thanks a lot!
The steps left on this build are, assemble and install the lid, paint and install the side panels and install and align the laser tube. Its been fun and educational building this from scratch.
FIX
Did any of that help?
Please put the ‘fix’ in the message… I’d like to know and it’s helpful for others… you can mark the thread that lead to the fix as solved… unless you fixed it some other way…
Good luck
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