摘要:
The printing apparatus according to the present invention includes a system for pre-warning of impending shutdown due to slippage of sheets within the printing apparatus sheet transport system (26). The system includes a plurality of sensors (S1,S2,S3) positioned along a sheet transport path for sensing sheets moving along the sheet transport path and a controller for determining an amount and location of slip within the sheet transport path by comparing outputs of the plurality of sensors. Once the location of the slip has been determined, automatic correction may be performed by the printing apparatus or manual correction may be performed by a service representative.
摘要:
The printing apparatus according to the present invention includes a system for pre-warning of impending shutdown due to slippage of sheets within the printing apparatus sheet transport system (26). The system includes a plurality of sensors (S1,S2,S3) positioned along a sheet transport path for sensing sheets moving along the sheet transport path and a controller for determining an amount and location of slip within the sheet transport path by comparing outputs of the plurality of sensors. Once the location of the slip has been determined, automatic correction may be performed by the printing apparatus or manual correction may be performed by a service representative.
摘要:
A method and system for correcting paper registration skew. A skew or paper registration error of a sheet moving in a feed path is detected. A coarse adjustment, or copy paper registration, using full steps is performed until the registration error is reduced to a minimum value, below a full step. The frequency of one motor (18,20) with respect to the other, or a reference, or reference motors, is adjusted for a fixed period to enable a fine adjustment to correct the registration error.
摘要:
A method of electronically determining the location of an edge of a copy substrate (710) to be printed on places the copy substrate (710) between a segmented linear light source (700) and a linear sensor array (712) and a light segment of the linear light source (700) is illuminated. An edge location (X co ) of a shadow created by the copy substrate (710) intersecting the light path between the illuminated light segment and the linear sensor array (712) is measured, and the location of the edge of the copy substrate (710) is calculated based on the measured shadow location (X co ). A second light segment of the linear light source on an opposite side of an expected copy substrate edge position of the light source can also be illuminated, and a second edge location of a shadow created by the copy substrate (710) intersecting the light path be measured wherein this second measurement can be used with the first to calculate the location of the edge of the copy substrate (710). Alternatively, the calculated location can be used to determine a light segment of the linear light source which corresponds to the calculated location. This determined light source is illuminated and the shadow measured. The new measurement is used to calculate the edge of the copy substrate (710).
摘要:
A method and system for correcting paper registration skew. A skew or paper registration error of a sheet moving in a feed path is detected. A coarse adjustment, or copy paper registration, using full steps is performed until the registration error is reduced to a minimum value, below a full step. The frequency of one motor (18,20) with respect to the other, or a reference, or reference motors, is adjusted for a fixed period to enable a fine adjustment to correct the registration error.
摘要:
A method and system for correcting paper registration skew. A skew or paper registration error of a sheet moving in a feed path is detected. A coarse adjustment, or copy paper registration, using full steps is performed until the registration error is reduced to a minimum value, below a full step. The frequency of one motor (18,20) with respect to the other, or a reference, or reference motors, is adjusted for a fixed period to enable a fine adjustment to correct the registration error.
摘要:
A system electronically determines an edge of a copy substrate (710) to be printed on. A copy substrate (710) is inserted between a segmented linear light source array (700) and a linear sensor array (712) and a light segment of the linear light source array (700) is illuminated. An edge location of a shadow created by the copy substrate (710) intersecting the light path between the illuminated light segment and the linear sensor array (712) is measured, and the location of the edge of the copy substrate (710) is calculated based on the measured shadow location. A way of calibrating such a system uses a claibrate tool (800) inlcuding a slot of width Δx, and measures the shadows cast by its edges with the tool at two different heights between the light source (700) and the sensor array (712).