Conditional Gcode question

nikscha

I want to extrude filament until my filament sensor triggers. I know there is a way where i use the sensor as an endstop, but i would like to know how to do it using conditional gcode. Something like this maybe?:

while !sensors.filamentsensor.trigger
    G1 E1

(not sure about the syntax/names)
As far as i can tell, this wont result in a smooth motion though.

OwenD

What's your use case?
Can't see why it wouldn't process just as fast as any other G Code, but it wouldn't be synchronous with any other moves.
I don't have a filament monitor, but I presume it will have a triggered state value
Edit: Just checked and it's "filamentPresent"

I'd try

while sensors.filamentMonitors[0].filamentPresent
      G1 E1
      M400 ; wait for move to complete

This assumes you only have one filament monitor or want to check the first one. (index 0)
The M400 may be needed to stop a case of many moves being queued before the trigger

OwenD

You could have the problem that filament monitoring is only active when printing from teh SD card
https://duet3d.dozuki.com/Wiki/Gcode#Section_M591_Configure_filament_sensing