Only one of the gantry joints move

This is absolutely infuriating!

all the axis move when homing, homing is successfull, but afterwards only one of the Ys moves.
And I've red the post "homing configuration" several times, there is literally nothing about configuring two axis as a gantry. There only is something about when you have a gantry setup, that somethings should be taken care of.
The last line, which says to look at the exampleconfig a gantry machine, was also only semi helpful since 1. This example config wasn't even available on my variant of linuxcnc, and 2. Since there is nothing helpful in the example config, 

Any help is still much appreciated. Any ideas, I'll take them all and try.

If you did configure as suggested, chances are one of your Y joints is spinning in the wrong direction, the one that moves after homing is OK, the other should be reversed, but beware as that requires reversing the search and maybe latch velocity directions.
Can be done easily by adding or removing - in front of scale and home search and latch velocity for that joint in the ini file.
To me sure, make a new very basic config with only steppers, but choose two sets of step/dir signals for Y axis, save, start the config and jog SLOWLY the Y axis. Do both run in the same direction?

So, RodW, I've seen you helping loads of people throughout the forums with gantry issues.
I have no idea what I'm doing wrong.
I followed all the advice  I found.

In the ini, coordinates are XYYZ, where joints 1 and 2 are y axis, both with home_sequence=-2.

Individually with other configs they move fine and correctly.

Together they home successfully, but after that only Joint1 is moving when jogging Y.

Maybe it's different if I ran GCode, but I doubt it.

I am truly at my wits-end, and slowly I start to want to throw away this whole project out of frustration.
Which I really don't want to.

 

Can you post your hal/ini files?

Again, you have one motor spinning in the wrong direction on Y axis, did you check that?

I did check, and no. It rotates correctly. I tested with a separate hal and ini set, where I mapped the outputpins of the moving y to the not moving (faulty) one. It moved as expected.

I can't post them easily now, no. Sadly I don't have a working PC at home which complicates matters.

I did however post them earlier in this thread, the hal and ini stayed mostly the same, and any changes I did, did not result in properly functioning movement.

Malteser01 wrote:

I did check, and no. It rotates correctly. I tested with a separate hal and ini set, where I mapped the outputpins of the moving y to the not moving (faulty) one. It moved as expected.

Ok, thank you.

The last line, which says to look at the exampleconfig a gantry machine, was also only semi helpful since 1. This example config wasn't even available on my variant of linuxcnc, and 2. Since there is nothing helpful in the example config,

Not sure why that should not be available on your installation:
github.com/LinuxCNC/linuxcnc/tree/2.9/configs/sim/axis/gantry

However your issue is not 'joint' jogging but axis jogging as your machine seems to home correctly.

is it possible you need:

loadrt trivkins coordinates=xyzy kinstype=b