Question about shielding of cables

[Doddy]

Hi,

Not shielding is like kicking a sleeping dog, at some point it's likely to wake up and bite you.!

That's a tag-line waiting to happen.

Now you say you are using a booster of the PC PSU, this is a bad idea and could cause problems because you are tieing the 24Vdc Gnd to the PC Gnd which can cause ground loops.

Generally agree - but think the OP is using a repurposed PC PSU as a stand-alone 24V supply.

OP: You're using mechanical limit swithes, into the BoB?, you don't mention the nature of the BoB, but I'm assuming the common Chinese flavour which has opto-isolated inputs. That should provide a bit of EMI resilience (noise picked up in the cabling on the machine is unlikely to have enough energy to generate a spurious trigger on the BoB input). A brushed motor is likely to generate a bit of HF noise - usually suppressed on the motor with a cap filter).

Ultimately the proofs in the pudding. You might find that your machine works well. Or you might find a spurious trip - usually half way through a job that ruins the workpiece. What Jazz says above is generally good advice.