bigtreetech / smart-filament-detection-module

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under extrussion and stringing #27

Open TOXICNITRO opened 2 years ago

TOXICNITRO commented 2 years ago

i bought an SFS so i could prevent that my ender 3 V2 would keep printing when the roll would jam. i am currently printing a 8 day print job with multiple parts, with a roll provided by a friend, sadly this roll is in not to good of a shape, and jams on itself.

i wanted to prevent my printer from continuing to print in the air while the roll jams. i installed an SFS and connected it to my raspi for octoprint with the smart filament sensor plugin, it detected when the filament would move, and it would stop the printer when it saw a stop of movement.

after testing that it worked, i got to work to setup 1 of the parts i have to print, and after starting it i noticed multiple problems.

the SFS causes a lot of friction, to much in my opinion. i would expect some friction to be there, since it has to move between 2 rolls. but the friction that occured was so bad that i think it caused the printer to under extrude and string.

an other problem i had could be software related, but the sensor would show that the filament is moving, but the remaining distance would still go down, there were no updates to whether the filament was moving or not, causing my printer to go in to filament change mode.

i have now restarted the printer without the SFS in-line between the extruder motor and hot end, and the problems mentioned above have now been fixed.

i would like to look at an sollution. i really like the idea of having the SFS in-line of the filament so it can prevent wastage of material, but if it causes my prints to fail, i will sadly have to return the SFS to where i bought it from.

EDIT 1: Problem was solved by the company where i bought the SFS, they send out a new one.