Sheet Conveying Drive Torque Balancing to Prevent Step-Out
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Solution Overview
Problem
Conventional image forming apparatuses face issues with synchronous control of stepping motors, leading to potential step-out due to uneven assist torque application across motors with different types and loads, especially when a single assist motor is used for multiple stepping motors.
Innovation Solution
A sheet conveying apparatus is designed with a plurality of driving parts connected to rotating shafts, featuring a first torque adjuster and a second torque adjuster, along with a hardware processor that controls the second torque based on the number of revolutions to ensure balanced assist torque application, preventing excessive torque and step-out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform assist torque is applied to all stepping motors, then synchronous control is achieved, but motors with different loads experience excessive torque causing step-out
Solution Approach 1:
The patent implements local torque adjustment by equipping each driving part with torque adjusters that can be independently controlled. This allows uniform synchronous control to be maintained at the system level while providing local flexibility to adjust torque for individual motors based on their specific load conditions and characteristics.
2Power
If assist torque is increased to supplement stepping motor torque at high speeds, then driving capability is improved, but step-out occurs in motors with smaller torque capacity
Solution Approach 1:
The patent dynamically adjusts the torque parameter for each driving part based on motor type and load conditions. By changing the torque parameter individually for each motor, the system can increase overall driving capability while preventing excessive torque application to motors with smaller torque capacity, thus avoiding step-out.
Data Source
AI summary
A sheet conveying apparatus includes: a plurality of driving parts each connected to one end of corresponding one of a respective plurality of rotating shafts; a first torque adjuster connected to another end of each of the plurality of rotating shafts, the first torque adjuster applying first torque to the plurality of driving parts; a second torque adjuster that applies, to the driving parts, second torque for adjusting the first torque to be applied to the driving parts by the first torque adjuster; and a hardware processor that controls the second torque to be applied to the driving parts in the second torque adjuster in accordance with a number of revolutions of the driving part.