RE: Filament Sensor (IR) problem
@masterhead
Thanks for the reply! I was trying UNDER the sensor and that was NOT working. I'll try the sides. I appreciate the help.
RE: Filament Sensor (IR) problem
In this post it says that it may work just loosing the screw
The spacer under the sensor seems to work also, you can get it here:
https://www.prusaprinters.org/prints/8624-mk3s-ir-sensor-spacer-05-mm/comments
RE: Filament Sensor (IR) problem
Ok, I think my issue is more to do with the smaller magnet that is inside the fs_lever. The tolerances were too loose so no matter what I didn during reassembly the magnet would pop out! I'm reprinting the lever and hoping to get a tighter fit and maybe apply a drop or 2 of CA glue to hold it in pace during assembly.
RE: Filament Sensor (IR) problem
Hi, I've the same problem. Filament loading to the nozzle stops approx. 5-10 mm too early. extruder gear can't reach filament.
I'll try you "shim" idea, but my sensor is realy tight mounted. no room for a shim, i think buts lets give it a try.
MK3S MMu2 manufactured Dec.2019.
besten Dank / kind regards
MK3S & MMU2S, Ender 3 Pro
RE: Filament Sensor (IR) problem
Hi @all,
her is my fix. The sensor works fine unless i tighten the case. It take me some time to figure out, whathe the issues was.
If the Case is open, the Sensor works fine. After i close the case, the sensor doesnt work anymore. All things are moving but i got continourly a 1 from the senor. I take the Case apart again.... the Sensor is working like a charm..
My Solution: I gently scraped off a little bit of Platic and after i close the Case an tighten the screws it works....
I hope it helps someone with the same Issue....
Thx
Zh4ng
RE: Filament Sensor (IR) problem
@zh4ng-master-of-disaster
servus MoD, thanks. in the meantime a printed the workaround
http://www.thingiverse.com/thing:3554066
I'll give it a try.
besten Dank / kind regards
MK3S & MMU2S, Ender 3 Pro
RE: Filament Sensor (IR) problem
@masterhead
Thanx - I had the same problem with a new printer (may 2020) - I just put an spacer of 0,8mm below the IR-sensor and now everythings works fine.
As using a spacer will cause trouble installing the cover again, i also made an new cover, you can find here for download:
RE: Filament Sensor (IR) problem
Same here: thank you for posting. your analysis helped me solve the issue quickly and easily.
I've made a thin cardboard 'ring' (<1mm thick) around the small screw to sit between the PCB with the filament sensor's housing to increase the distance.
I agree that Prusa could improve the robustness here by checking the design tolerances.
Moreover this may be included in the setup checks/calibration to manually check the filament sensor functionality before using the printer. would have saved me a long print and some other issues, because i think it hasn't been working since the get go a few weeks ago.
so thanks again!
Jelte
RE: Filament Sensor (IR) problem
Just found this thread as I had the same problem on my MK3S+. Thanks for posting! I had printed the lever arm and filament guide piece out of ABS 6-8 months ago, but just the other day the printer kept thinking it was out of filament mid print. On examination of the two parts I couldn't actually see any wear on them visually, and when doing the sensor test I was seeing a solid 1 with filament inserted. I went ahead and reprinted them out of PETG anyways, and that solved the problem! The tolerances must need to be pretty tight as I honestly did not see any issue with my old pieces, but apparently there was one.