Using the manual start feature, the extruder will prepare for extrusion by heating up the barrel and then wait for a manual start command before starting the extrusion process. Once heating is complete, its LED lighting will turn blue and a message is shown on the screen to indicate it is ready to start.
The manual start feature should be used with care. Most materials will quickly deteriorate and eventually burn when they remain hot without the extruder running, which can make it hard to (completely) remove the material from the barrel and can prevent proper operation of the extruder.
To prevent such damage, the extruder will automatically shut off if the extrusion process is not started within a specified timeout. This timeout can be specified when starting the preparation process. Acceptable values are heavily material-dependent, but anything more than a few minutes is not recommended. Using this feature is at your *own* risk.
From our experience, the polymer PVA in particular is sensitive to burning. Always consult the material specsheet if uncertainty exists for a new material, *before* using the manual start functionality.