Velleman k8097 4 channel usb stepper motor card velleman k8097 with the velleman k8097 4 channel usb stepper motor card kit you can simultaneously check the status of the dry inputs like emergency stop signal limit detection etc while the motor turns you can use the switch inputs to test the motor the motor card can be used in every application where positioning is needed e g plotters printers valves automation etc velleman k8097 4 channel usb stepper motor card