Sheet processing apparatus, image forming system, and non-transitory recording medium

An image forming system comprising:

• an image forming device to form an image on a sheet;
• a sheet processing apparatus on which the sheet that has passed through the image forming device is stacked to perform given processing on the sheet;
• a sheet ejection unit including a pair of rotors to eject the sheet processed by the sheet processing apparatus;
• a guide to move to a first position above a top face of lower one of the pair of rotors and a second position below the top face of the lower one of the pair of rotors;
• and
• processing circuitry configured to send an instruction to stop an image-forming operation by the image forming device or an instruction to stop conveying the sheet to the sheet processing apparatus when the guide is at the first position and an instruction to execute the image-forming operation by the image forming device is given.

A non-transitory recording medium storing a plurality of instructions which, when executed by one or more processors of a sheet processing apparatus, causes the one or more processors to perform a method,

• the sheet processing apparatus including
• an image forming device to form an image on a sheet,
• a sheet processing apparatus on which the sheet that has passed through the image forming device is stacked to perform given processing on the sheet,
• a sheet ejection unit including a pair of rotors to eject the sheet processed by the sheet processing apparatus, and
• a guide to move to a first position above a top face of lower one of the pair of rotors and a second position below the top face of the lower one of the pair of rotors,
• the method comprising
• terminating an image-forming operation or conveyance to the sheet processing apparatus when the guide is at the first position and instructions are given to execute the image-forming operation by the image forming device.