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MMU just blinks red lights  

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jon bondy
(@jon-bondy)
Active Member
MMU just blinks red lights

Not sure that this is the right place in the forum for this.

The MMU has worked OK for a few months, but suddenly all of the LEDs blink red immediately after I power up. There is no filament sticking out to impede the slider from moving back and forth, and the slider moves easily when the power is off and I move the threaded rod.

Any suggestions?

Posted : 21/01/2019 10:00 pm
Olef
 Olef
(@olef)
Prominent Member
Re: MMU just blinks red lights

Usually means the FINDA is activated, i.e. filament or strings stuck under the steel ball.

Posted : 21/01/2019 10:35 pm
Nikolai
(@nikolai)
Noble Member
Re: MMU just blinks red lights

FINDA glowing red light -> no filament
FINDA is dark -> filament detected or FINDA doesn't get power

Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram

Posted : 21/01/2019 11:48 pm
toaf
 toaf
(@toaf)
Noble Member
Re: MMU just blinks red lights

maybe your ball is stuck abit. but 100% sounds like finda issue

I have a Prusa,therefore I research.

Posted : 22/01/2019 1:48 am
richard.l
(@richard-l)
Member Moderator
Re: MMU just blinks red lights

Moved to appropriate forum.

Posted : 22/01/2019 4:05 pm
eschlenz
(@eschlenz)
Eminent Member
Re: MMU just blinks red lights

I 100% agree with the other replies. The FINDA would be the first thing I'd check in you situation.

When I suspect the FINDA, I do the following:

1. Unscrew the bolt that holds the FINDA in place.
2. Remove the FINDA probe.
3. While covering 1/4 of the top hole with a finger, I'll spray air through the front hole. Your finger is there just to prevent the ball from jumping out from the air pressure.
4. Also, blow air in from the top hole.
5. Reinstall the FINDA probe by following the instructions for setting the FINDA height.

Posted : 23/01/2019 2:50 am
jon bondy
(@jon-bondy)
Active Member
Topic starter answered:
Re: MMU just blinks red lights

Thanks for all of your comments. I fiddled with the FINDA and blew all of the holes out, and it is working again.

Posted : 24/01/2019 5:40 pm
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