Printing apparatus, conveyance apparatus, and conveyance control method

A conveyance apparatus for pulling out, in a conveyance direction, a sheet wound into a roll around a roll shaft and conveying the pulled out sheet by a conveyance roller, comprising:

• a conveyance motor configured to rotate the conveyance roller;
• a first control unit configured to control said conveyance motor such that a rotation velocity of the conveyance roller in the conveyance direction increases in an acceleration region of the conveyance roller, becomes constant in a steady region of the conveyance roller, and decreases in a deceleration region of the conveyance roller;
• a feed motor configured to rotate, about the roll shaft, a rolled portion that is a portion of the sheet wound into the roll;
• and
• a second control unit configured to control driving of said feed motor,
• wherein a single conveyance in intermittent conveyance of the pulled out sheet includes the acceleration region, the steady region and the deceleration region, and
• said second control unit is further configured to control said feed motor so as to:
• rotate the rolled portion by a predetermined torque, in the conveyance direction in the steady region,
• rotate the rolled portion by a torque obtained by adding, to the predetermined torque, a torque in the conveyance direction necessary for accelerating rotation of the rolled portion in the acceleration region,
• rotate the rolled portion by a torque obtained by adding, to the predetermined torque, a torque in the conveyance direction necessary for decelerating rotation of the rolled portion in the deceleration region, and
• apply a back tension to the sheet between the rolled portion and the conveyance roller in a state where said first control unit does not execute driving of said conveyance motor for conveyance by the conveyance roller after a first conveyance in the intermittent conveyance and before a second conveyance following the first conveyance.