2.Printer controller overview
The printer controller manages print options, provides the user interface, and runs system management and diagnostic operations on demand. The following is an explanation of tasks that enable the job to be printed:
•The printer controller detects which job protocol is being sent.
•Print option parameters are stored in the Job Pool Manager (JPM) database, which maintains a database of all jobs. This database contains a reference to the print data on the fixed disk, as well as the print options parameters for the print data. The JPM responds to the printer controller commands for deleting, holding, and prioritizing jobs.
•Print data is is stored on the printer controller disk for queuing and while printing.
•When the printer controller begins processing a job, it sends the print data to the decomposer. The decomposer converts the print data into a bitmap in the resolution appropriate to the printing device.
The decomposer utilizes font data from font files stored on the printer controller disk or font information sent to the printer controller with the print job.
•When processed data comes back from the decomposer, the printer controller Device Driver transmits the print data and print option parameters to the printer. Printing is then initiated.
•After the job has been printed successfully, the print data file is deleted from the disk. If an error inhibits job completion, the printer controller manages the recovery and completion of the job.
The system can manage the processing of multiple jobs and the printing of another job simultaneously. When you are printing IPDS jobs, the printer controller is able to queue multiple PostScript, and PCL jobs at the same time. When you are printing PostScript and PCL jobs, you can send only one IPDS job.
Xerox DocuPrint 4050/4090 NPS/IPS System Overview Guide |