A sheet conveyance device including: a conveyance roller that conveys a sheet; a motor that rotationally drives the conveyance roller at a constant speed; a central processing unit (CPU) that: periodically acquires temperature increase rates for the motor from a start of sheet conveyance, the temperature increase rates depending on magnitudes of effective current applied to the motor, the effective current depending on loads during sheet conveyance; and estimates a current temperature of the motor based on a cumulative value calculated from the temperature increase rates and time elapsed from the start of sheet conveyance; and a controller that executes a motor temperature control based on the estimated temperature of the motor.

An image forming apparatus includes a stacking unit, a pickup roller, a conveying roller, a transfer unit, a motor, a determiner, and a velocity adjuster. The conveying roller conveys, in a conveying direction, a sheet fed by the pickup roller from the stacking unit. The determiner determines a value of a parameter corresponding to a load torque applied to a motor rotor. Based on a length between a front end of the sheet and a nip position of the conveying roller at a first timing when the determined value changes from a value smaller than a predetermined value to a value greater than the predetermined value, and a length between the nip position and a predetermined position downstream of the conveying roller and upstream of an image forming position in the conveying direction, the velocity adjuster adjusts a conveying velocity at which the sheet is conveyed to the predetermined position.

An image forming apparatus includes a stacking unit, a pickup roller, a conveying roller, a transfer unit, a motor, a determiner, and a velocity adjuster. The conveying roller conveys, in a conveying direction, a sheet fed by the pickup roller from the stacking unit. The determiner determines a value of a parameter corresponding to a load torque applied to a motor rotor. Based on a length between a front end of the sheet and a nip position of the conveying roller at a first timing when the determined value changes from a value smaller than a predetermined value to a value greater than the predetermined value, and a length between the nip position and a predetermined position downstream of the conveying roller and upstream of an image forming position in the conveying direction, the velocity adjuster adjusts a conveying velocity at which the sheet is conveyed to the predetermined position.

A paper rewinding machine includes a rewinding assembly operable to produce coreless retail paper rolls.

A paper rewinding machine includes a rewinding assembly operable to produce coreless retail paper rolls.

A paper rewinding machine includes a rewinding assembly operable to produce coreless retail paper rolls.

A paper rewinding machine includes a rewinding assembly operable to produce coreless retail paper rolls.

A paper rewinding machine includes a rewinding assembly operable to produce coreless retail paper rolls.

In some examples, velocity and torque based media motor control may include ascertaining a velocity and torque for a feed roller motor associated with a feed roller, and ascertaining a velocity and torque for a drive roller motor associated with a drive roller that is to receive media from the feed roller. Further, velocity and torque based media motor control may include determining whether the torque for the drive roller motor is greater than a torque target. In response to a determination that the torque for the drive roller motor is greater than the torque target, the torque for the drive roller motor may be reduced to the torque target, and the torque for the drive roller motor may be maintained at the torque target.

A sheet conveying apparatus includes a stacking unit, a feeding unit, a conveying path, a first conveying roller, a second conveying roller, a controller configured to execute first driving for executing a driving of the first conveying roller and a driving of the second conveying roller, a discriminator configured to determine a position of the sheet based on a value of a parameter corresponding to a load torque applied to a motor for driving a conveying roller driven during the first driving, and a storage unit configured to store information regarding the position.