7. Diagnostic
There are a large number of diagnostic functions. However, not all functions are valid at all times -
some are only valid when the jet is stopped (e.g. “Clear Nozzle”); some are valid only when the jet
is running and printing is stopped (e.g. “Start Print”), and some are only valid when both the jet
and printing have been started(e.g. “Test Printer”).
To keep the size of the diagnostics menu small, and to prohibit the use of functions which are
invalid for the current state of the printer, only valid functions are displayed and are selectable at
any given time. This is in addition to menu variations due to the password level.