Centroid Community CNC Support Forum

The hookup schematic "S14954-ACORN_rev4_LIMITALL_HOMEALL" shows all the limit switches wired in series.
How does that work?
Does it only home one axis at a time?
How does it know which axis is tripping the switch?
If one is tripping the switch, how will it tell if the other axis reach their switch?

Confused.exe

Use the search box in the upper right to search on "homeall". Many posts explaining how it works.

In the wizard you can set the order of axes to home e.g.Z (3) first, then Y (2) then X(1) would be typical for a mill. You also set direction but based on your question if you place a limit switch on the X axis, because they're in series it shouldn't matter where in the series it's wired - when tripped it opens and breaks the path. Just check to make sure all the switches open and close.

HTH

A key point to understand is that home is just clear of the switch, not on the switch.

Since each axis moves clear of the switch after tripping it, and only one axis homes at a time, the code can assume that the axis that is in motion is the one that tripped its switch.

That is why you cannot start homing if a switch is already tripped. You have to jog clear first.

cncsnw wrote: ↑Fri Oct 08, 2021 11:21 pm A key point to understand is that home is just clear of the switch, not on the switch.

Oh that makes a lot of sense. I didnt realize they backed off the switch automatically.

Thanks!