Gantry and Gmoccapy

Hello guys,

I'm going to start a machine project in which I will have two sets of servo and motor drivers on one axis (X,YY,Z).  I intend to use the Gmoccapy interface and the Mesa 7i76E board hardware part.  I've never built a Gantry machine and I would like to understand the correct way to do it, I have a question.  The hardware part do I use pulse and direction signals in parallel together on the same axis (in my case Y axis), or on different X(0), Y(1), Z(2) and Y2(3) axes?  And the software part I create a normal machine in three axes then I add another joint, or if I connect the physical part of pulse and direction together (in parallel) the same axis as the Y (1) I don't need it.  
Could someone enlighten me.

Tks
Ingo

Hi Ingo,
thanks to the abstraction concept of LinuxCNC, the GUI is independent of the axis configuration. Using 2.8.2 you want to set up each axis as an individual joint, with the Y axis having two joints. Personally, I prefer to call them X (Joint0), Y1 (Joint1), Y2 (Joint2), Z (Joint3). The reason you want this is to benefit from gantry squaring using home offsets.

I run a gmoccapy 2.8.2 setup with a 7i76e and YXXZ(A) config. The config is reasonably documented and available here:
github.com/GuiHue/kondor/

thank you very much, i will study

Hello,

I managed to create XYYZ machine, I have a doubt in the home of the YY axis (tandem).  Do I need to have the physical reference switch for each axis, or one for both axes?

each joint needs its own home switch and it must stay triggered to end of travel.