Lathe Spindle Direction Relay Issue

I've recently put together a cnc mini lathe and got the spindle hooked up using a CNC4PC C11G board. The direction controls and relays are working fine, the problem comes when I stop the spindle in the forward direction. When I press spindle stop, the spindle goes reverse for a few seconds, and then shuts off the reverse relay. When I stop in the reverse direction, this doesn't happen, although there is a couple second delay between when I press spindle stop and the relay clicking off.

What I would like to know is why the spindle reverse relay is turning on for a couple seconds when I do a spindle stop. I'm assuming it is a preset command of some sort to attempt to electrically brake the spindle, but that isn't necessary with my setup. If anyone could point me to where the code for controlling the spindle fwd/rev delay and switching, that would be great. I tried finding it in the hal file but didn't find anything. I can post any files if needed.

Here are some pictures and a video of it running to show the issue. The hal and ini files are pretty much default from the wizard. The wiring is pretty simple, just 12V from psu, converted to a 0-10V signal for speed controller, then the 120V DC is inverted using the two relays and the commons go to the motor. I can't imagine the wiring would be causing this effect, it seems to be a controller related issue.

 
 


Video: youtube.com/shorts/gbUz_N31UVA

 
 

I hadn't thought to check that, and yeah it seems to be doing something weird. The relays don't seem to be following the hal for some reason, like they're getting powered from a different source somehow for a few seconds. That would at least explain the shutoff delay on reverse. No idea what's going on with the sudden reverse after the forward shutoff though. And it happens as well in axis gui.

I also quickly tested disconnecting everything from the relays and they still do the same thing with only the 5V and 12V connections going to the board. Also tried disconnecting the 12V, just leaving the 5V power and still happens.

Video