Sensor activates at beginning of the print

[timgrahame]

Hi all,

I have a problem where the the smart sensor is activating right after the initial purge before the print. I believe this is an issue reported on the main direct print github as well. The sensor sees a purge as lack of movement and then activates.

Is there anyway to resolve this? I have it set to distance right now, but I found that because of the length of time to begin a print (heat bed, carry out levelling, heat hotend), that it would fire if I had it on time.

I have an Ender 3 with the filament sensor mounted just before my extruder.

Feature Request: Is it possible to add an 'activate sensor after X time'? This would resolve the sensor giving false alerts during the purge.

[codethrower]

I am getting the same issue. Has anyone solved this?

[Royrdan]

Not 100% sure for your situation but I had the filament push forward before a print started which set the STOP off at the start.
My filament is run through the sensor then the extruder with a gap. When the print finishes it retracts about 50mm which buffers between the sensor and extruder.
It uses a G1 command which starts the sensing but also obviously doesnt pull through the sensor until it reaches the 50mm. I dont think it uses any timeout if your using distance detection. I THINK I fixed it by running a G92 gcode after extruding the filament which from reading the code I THINK it resets the distance sensor. Seems to be working so far.