Embodiments of the invention generally relate to credential processing devices and methods of feeding credential substrates in a credential processing device. One exemplary embodiment of the credential processing device includes a processing path, a print head, a transport mechanism, a first motor, a substrate input and an input feed mechanism. The print head is configured to print to a surface of a credential substrate that is fed along the processing path. The transport mechanism comprises one or more transport feed rollers that are configured to feed individual credential substrates along the processing path. The first motor is configured to drive the one or more transport feed rollers. The substrate input comprises an input feed roller configured to feed individual substrates from a supply to the transport mechanism. The input feed mechanism has an activated state, in which the input feed roller is mechanically coupled to the motor, and a deactivated state, in which the input feed roller is mechanically decoupled from the motor.