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HP Designjet 4500 Printer Series - No Negative Impact on Throughput when Using Stacker

There is no negative impact on the printer’s throughput when a Stacker is installed.
It has been reported that the stacker for the HP Designjet 4500 printer is useful but slows the performance of the system down, as it reduces the printing speed of the printer to adapt to the mechanical speed of the stacker.
This is an incorrect perception because the printer advances in 2 inch increments, while the movement of the stacker is continuous, which may lead some to believe that the movement in the stacker is slower. The actual facts are that the printing speed of the HP Designjet 4500 is exactly the same with or without the stacker (print modes do not change).
This can be easily checked by printing the same job with and without the stacker and measuring the time required.
The only cases where the stacker may impact the click to start printing times are:
  • When the stacker has just been powered up - In this case, the stacker will need 5 minutes to reach its operating temperature and the system will not print while the temperature is rising (the front panel will show a message “Stacker warming up”).
  • When the stacker has been unused for more than 1 hour - In this case, the stacker will need less than 1 minute to reach its operating temperature again (the front panel will show a message “Stacker warming up”).
If the stacker was being used, it will need no time to warm up and it will be possible to start printing immediately.