Duraflex System Device Advanced Settings.

Inside the Navigator Server under Configure Device:

1. Job Press Speed.

The default setting for this is blank, i.e., use the value the press has determined.
 When submitting a job to the press, the press will determine the maximum speed for the press; however, the operator may want to run the press at a lower speed. This field allows the operator to specify this lower speed.


2. Print On Media
 This flag controls whether the press will print data if media is present or not. The press default is NOT to print when there is no media under the print sensor.

3. Auto-start on IDLE.
The default state for this item is checked. It could just be called “Print the jobs”. Because turning it off stops you from printing anything until you turn it back on.
If checked, the software will automatically start the print process when a job is submitted to the press.
If unchecked, the job will not be started and will sit on the press waiting to be printed. This might help you to queue up a few tiny jobs to the press before starting.   It might become very important to you if you are trying to chain together very small jobs (e.g. multiple 1 page jobs that you want to print without gaps or without mid-job servicing)  If so, look at this. 

4. Auto clear FAULT.
The default state for this item is unchecked.
If unchecked, the software will NOT attempt to automatically clear FAULTs on the press.
 If checked, the software will attempt to automatically clear the FAULT by re-initializing the press.

5. INK_OUT timeout.
The default value for this item is 15 seconds.
 When one of the inks on the press is nearly out the press will inform the software which will allow the job to continue but will pause the job before the ink actually runs out and triggers a FAULT. Due to the variables involved the actual value will need to be determined when the system is installed.

6. Missing TOF timeout.
The default value for this item is 20 seconds.
 For a number of reasons it is possible that media may stop passing under the printhead leaving it exposed. If left for too long a period, the printhead will begin to dry out which could result in damage and loss of performance and quality. If the software does see an indication that media has passed under the head before the timeout expires, it will cancel the job and cap the printhead to protect it. It cannot pause the job as the press has pages that are waiting to be printed and will not pause while this is the case, leaving the head exposed. This timeout value should be adjusted at installation.

7. Print Buffer Start Trigger (%)

This is referring to the buffer on the printer.  Not our spooler buffer.  It also refers to the job at the front of the queue.  It isn't used across jobs in release 5.1 or earlier.

The default value for this item is 50%.  This is 3000mb.  The press buffer is 6gb.  
While the software renders the pages of the job very rapidly and the network transfer to the press is also rapid, occasionally network and rendering issues may cause pages to be send to press at below optimal levels.
The software will wait until the specified trigger percentage of the press’s print buffer is full of job data before starting the print cycle, in order to build up a ‘head of steam’ to try and minimise any issues caused by network or rendering issues which could result in a data underrun and a failed job output.
 If all of the job’s data is sent to the press before this level is reached, then the job will start the print cycle anyway.

8. Print Buffer Underrun Trigger (%)

Again, this refers to the buffer on the printer. The default value for this item is 15%. While this may seem quite high, I would not recommend setting a value below this; the press’s buffer is 6000MB and a CMYK US Letter page is about 80MB, so 15% equates to about 11 pages. The pause process usually requires about 8 pages to complete, so 15% includes a small safety margin.

As a companion to the Print Buffer Start Trigger, this value is used to prevent the press running out of data when printing very complex jobs that take a long time to render, by pausing the job if the buffer level falls below the specified level, and then waiting for the buffer to refill above the Start Trigger (7) or for all of the job’s data to be in the press’s print buffer.

This trigger will not activate if, when the buffer falls below the specified level, if all of the job’s data is in the press’s print buffer as the job will complete normally.


More information about buffering is here

Duraflex Spooler Press Control panel

Note: This dialog may not always be visible as it is primarily for performing specific functions on the press, and most of the operations on it are also available via the Duraflex settings dialog on the DFE. The buttons on the dialog are a backup for the DFE and should only be used if the DFE is unable to perform the required operation.

 Used to turn on the press interface software. Will only be enabled if the software is in the OFF state.


Used to turn off the press interface software. Will be enabled of the software is NOT in the OFF state.


Used to cancel the currently printing job.


Used to clear a FAULT on the press interface software by re-starting the press software.

 Used to pause the currently printing job.

 Move the print head to the position specified in item 15.

 Move the printheads to a position where maintenance can be performed.

 Start a service process on the printhead using the option specified in 14.

 Clear all jobs queued on the press.

 Return the current status of the press.


Adjust the KWS process values using the KWS multiplier values in 16.

More information on Duraflex printer controls is here