Intended filament change procedure mid print

Scottty

Hi, I have a self made cartesian printer using repetier firmware V1.0 and - since two months- server pro V0.86 with touch UI.

Recently mid print the spool ran out of filament and I just tried "filament change" at the UI to see what happens.

It did not work properly, and after Emergency stop the print head crashed into Y max (why this??).   

In documentation and forum I did not find the planned process for
filament change due to "spool ran out of filament mid print".

Is it necessary to pause at first, including pause script defining a xy position for performing the filament change?
Then perform filament change with UI?
Then resuming (how is the old extrusion position from the last regular move restored?)

I would be happy to get any hints where this filament change scenario is described using the touch UI.

Thanks in advance
Scottty

Repetier

It depends how you have compiled firmware. You can set it to do it over the printer lcd, then it blocks communication. Or you say to just request a pause from server and then it blocks not and waits for server pause instead. Sounds like you opted for variant 1 and you have not set pause position correctly. In early 1.0.x versions this was left x and max y.

If you just want to change filament mid print you need to pause yourself and then run the change filament. Make sure you have a good pause script in server that moves to the side so you are not atop of the print when being paused.