HP DESIGNJET 3D, Service Manual

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Comm Server
The comm server software on the system is the other half of the download
software that is part of the HP Designjet 3D Software Solution. Parts to be
built (.cmb files) are received by the comm server and saved on the data
partition of the hard drive. Queue management of the parts to be built is
also part of the comm server. Lastly the comm server provides HP Designjet
3D Software Solution the printer status information that is displayed on the
workstation (PC).
System Manager
The system manager software provides the overall control and decision
making functions that are used by the system during all operations. User
requests are received from the display driver (in response to button pushes).
The requests are processed and commands sent to the controller board to
activate the appropriate hardware.
Move Compiler
When
“Start Part”
is requested the system manager activates the move
compiler. The move compiler retrieves the cmb file from the top of the queue.
The CMB file defines the tool path for the part on a layer by layer basis. The
move compiler calculates the proper extrusion rate for the road thus
combining tool path and extrusion. The resulting motion control is saved in a
PCB file.
Feeder
This driver takes the output of the move compiler and feeds the motion
control information to the controller board on demand. The feeder will
typically start before the move compiler has finished the calculations for the
part. This eliminates waiting for all calculation to be complete. As the
controller board executes the motion control commands they are removed
from dual port memory. The feeder adds new commands as space becomes
available.
Event/Command Monitor
This software handles all non-motion control interactions between the single
board computer and the controller board. Events are printer status
information being sent to the single board computer. Commands come from
the single board computer telling the controller board to do something such
as find home.