Filament sensor is always triggered

gregsaun / bear_extruder_and_x_axis

An improved extruder and X axis for Prusa i3 printers

GNU General Public License v3.0

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Closed Sjoerd closed 4 years ago

Sjoerd commented 4 years ago

Hi, My filament sensor is always triggered, only if I put it out of the extruder it returns 'OPEN' (M119 command).

gregsaun commented 4 years ago

May I ask you to share a pic with sensor close and sensor open? This might save some words ;-)

Which printer do you run? MK2.5S or MK3S?

Sjoerd commented 4 years ago

I'm using the MK3S extruder, I'll send a picture when I'm home. (± 5 hours from now)

Sjoerd commented 4 years ago

20191213_152049 20191213_152101

gregsaun commented 4 years ago

Thank you for your image. I see several issues on your extruder. Could you give me more precision about those points?

Blue arrow: the carriage is not aligned with extruder body. This could bend the connector and so the sensor PCB making the reading difficult.
Green arrow: sounds like there is a crack or opening here, make sure not light enters here
Yellow arrow: not linked to the filament sensor but you are using a pancake stepper which will have not enough torque and loose steps.

Sjoerd commented 4 years ago

Thanks,

That's right, I solved that by printing a new carriage, thanks :)
It isn't a crack, it's a failed layer (I don't have enough PETG to reprint it), when my new roll arrives, I'll fix it
Pancake stepper motor is temporarily, the new one will arrive later this week. (the original broke :( )

gregsaun commented 4 years ago

When no filament is inserted you have the opening here that looks too big. Could you find why? sjoerrdd_filament_sensor_issue_01

gregsaun commented 4 years ago

Also could you try the filament sensor out of the body?

Sjoerd commented 4 years ago

It worked, there were some "pustules" on the back of the lever, so it was pushed too far forward.

Thanks for helping :)

gregsaun commented 4 years ago

Great!