Image forming system with strain detection

An image forming system comprising:

• an image forming apparatus including, an electrophotographic image forming unit which develops an electrostatic latent image with a toner:
• a housing in which the image forming unit is provided;
• and a strain detector which detects strain of a bottom plate of the housing;
• and
• a hardware processor and a storage which are included in the image forming apparatus or provided outside the image forming apparatus, wherein
• the hardware processor:
• obtains a first detection signal from the strain detector, and stores strain measured data based on the first detection signal as reference data in the storage;
• and
• obtains a second detection signal from the strain detector after storing the reference data in the storage, compares strain measured data based on the second detection signal with the reference data, and determines whether or not adjustment of a supporting point height of the bottom plate to reduce the strain of the bottom plate due to change over time from a time of the obtainment of the reference data is required, wherein the strain detector is provided between two supporting points of the bottom plate so as to be closer to one of the two supporting points.

An image forming system comprising:

• an image forming apparatus including, an electrophotographic image forming unit which develops an electrostatic latent image with a toner;
• a housing in which the image forming unit is provided;
• and a strain detector which detects strain of a bottom plate of the housing;
• and
• a hardware processor and a storage which are included in the image forming apparatus or provided outside the image forming apparatus, wherein
• the hardware processor:
• obtains a first detection signal from the strain detector, and stores strain measured data based on the first detection signal as reference data in the storage, and
• obtains a second detection signal from the strain detector after storing the reference data in the storage, compares strain measured data based on the second detection signal with the reference data, and determines whether or not adjustment of a supporting point height of the bottom plate to reduce the strain of the bottom plate due to change over time from a time of the obtainment of the reference data is required, wherein rigidity of the bottom plate in a detection direction in which the strain detector performs the detection is higher at a no-detection target part than at a detection target part where the strain detector performs the detection.