If your CNC Spiders get stuck in a particular direction, it's usually because they got jammed. This can happen if the tool or part is misaligned, or if its axis has gotten bent. It's also possible for the motor to get hung up on something, like a screw
CNC Spiders are designed to spin in one direction only. If you try to turn them by hand, they will just spin in the same direction they were spinning before they got stuck. This can be frustrating when you're trying to make a part out of material that doesn't want to cooperate
Luckily there is a solution: Turn them in reverse!
cnc spinder turn in reverse direction