Endstops for 2 x axis motors on Duet 2

djthuma

Hello,

I am building a custom 3D printer, gantry style, using a duet 2 wifi and 2 X - axis motors, 1 y axis motor and 1 z axis motor.

I am wondering how to wire and setup the config. to have 2 endstops on the x axis? One on the back left and one on the back right of the machine, thus keeping the machine square when homing.

Would I need to have individual drives for each motor and endstop? Or could I connect both to a single driver and have two endstops.
Would I need a duex5 expansion board or duet 3 board to get the independent drives?

Any help is appreciated.

Thank you

jay_s_uk

@djthuma you would need a driver per motor.
If you only have 1 tool then you have enough on a duet 2.
For the X axis it would be something like M584 X0:4 assuming you're using the E1 driver for the second motor
for the endstop M572 X1 S1 "xstop+e1stop"

Phaedrux

That solution also assumes the endstops are moveable so that they can be positioned to eliminated any skew. If you can't move them, then you would need to split the X axis into two independent axis, home them, and them apply a movement offset to cure any skew, and then recombine to X.

Both methods are shown here: https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_auto_levelling

It focuses on the Z axis, but the concept is the same for other axis.