: The XP (Pulse) and XD (Direction) terminals connect to the corresponding terminals on your motor drivers.
Ensure the lens cap is removed and the USB port is providing power. Try a different USB port. bsmce04u-pp manual
Clean the lens gently with a microfiber cloth and ensure you are within the focal range (adjust the stand height). : The XP (Pulse) and XD (Direction) terminals
: Supports a maximum step-pulse frequency of 100KHz , making it suitable for most hobbyist stepping motors. bsmce04u-pp manual