Grinding noise when starting bed mesh

[stiff trellis]

I've been putting together my 2.4 for the better part of a month now, and I'm trying to figure out why it keeps making these noises whenever I start a bed mesh. I've attached a video of when it starts the bed mesh, but it's not exclusive to when that starts. It also consistently happens when starting a purge line at the beginning of prints.

Here's my printer.cfg: https://pastebin.com/DkL4pW8E
macros.cfg: https://pastebin.com/ARsQUy8G
and homing.cfg: https://pastebin.com/a54SVnkf

I can all but assume it's something I've done wrong (either in firmware or hardware), but I'm at my wits end trying to figure out where. I've tried retensioning the belts, adjusting the speed of homing (this made it worse when I moved it to 300, happened the entire time instead of just the start), changing the microsteps for the stepper motors I'm using (they're what seem to be pretty generic ones that I got in a kit, so I'm not sure what the actual specs are supposed to be). I've also deracked and squared the gantry.

Does anyone know what would be causing this?

[atomic wolf]

you have stealthchop enabled, and then are trying to move fast

don't do that

[stiff trellis]

Oooohhh

I didn't even think of that

Thank you, I'll try that next

[atomic wolf]

stealthchop is almost never a good idea on the A/B motors (z and extruder it can be okay, since they don't move as fast)

[stiff trellis]

Yeah, that makes sense

First time getting through a full high-speed build, I hadn't even considered it

Thank you again

[stiff trellis]

Yeah, that was it...