Notifications
Clear all

filament sensor issues - updated part coming in may...  

Page 1 / 2
  RSS
keithywhites
(@keithywhites)
Trusted Member
filament sensor issues - updated part coming in may...

i recently am having issues with my filament sensor. it wont pass the selftest. contacted prusa chat and was told to leave it unplugged untill a new part is available in may sometime. i checked the resistance of the 4 sensor wires , and they are all ok. is anyone else having this issue? i never had any issues with it, i turned it off when i printed with some transparent pla, and since then it wont pass self test, and i cant turn it on.

Posted : 16/04/2018 10:47 pm
Bill
 Bill
(@bill-3)
Estimable Member
Re: filament sensor issues - updated part coming in may...

Interesting... When you say new part, did they mean new stock of the old part, or a new part altogether???

My first sensor was not very reliable. I ordered a another with other parts I needed and it has been better. I noticed in the instructions when I rebuilt that it noted NOT to touch the sensor part with your fingers. I don't know if that was in the original instructions or whether I missed it. But, I know I touched my old sensor and that may have been part of my problem with the first one. I made sure not to touch the replacement. The new one has been better, but it still does not like glossy/shiny PETG that I have.,

...
Posted : 17/04/2018 9:18 am
CybrSage
(@cybrsage)
Honorable Member
Re: filament sensor issues - updated part coming in may...

I am having an issue where the sensor is not detected at all. Prusa sent me a new sensor with cable AND a new board and none of them made any difference. I just emailed them about this updated part you mentioned. I am hoping this is true, since the filament out sensor is one of the big reasons I purchased the MK3 instead of the far cheaper MK2S.

Posted : 17/04/2018 10:15 pm
keithywhites
(@keithywhites)
Trusted Member
Topic starter answered:
Re: filament sensor issues - updated part coming in may...


I am having an issue where the sensor is not detected at all. Prusa sent me a new sensor with cable AND a new board and none of them made any difference. I just emailed them about this updated part you mentioned. I am hoping this is true, since the filament out sensor is one of the big reasons I purchased the MK3 instead of the far cheaper MK2S.

in chat, they said message back in may and they would ship me an updated sensor at no charge to me. they told me to unplug it until then

Posted : 18/04/2018 3:00 am
CybrSage
(@cybrsage)
Honorable Member
Re: filament sensor issues - updated part coming in may...

Let us know what they say in May when you contact them please.

Posted : 18/04/2018 8:53 pm
CybrSage
(@cybrsage)
Honorable Member
Re: filament sensor issues - updated part coming in may...

Prusa contacted me and said they are sending me a new sensor. I suspect they have the new ones in and that is why they are trying another sensor. They did not say it was a new version, but we shall see.

Posted : 03/05/2018 10:31 pm
Chris
(@chris-16)
Reputable Member
Re: filament sensor issues - updated part coming in may...


Prusa contacted me and said they are sending me a new sensor. I suspect they have the new ones in and that is why they are trying another sensor. They did not say it was a new version, but we shall see.

pix when you get it will be greatly appreciated.

Posted : 04/05/2018 8:17 am
CybrSage
(@cybrsage)
Honorable Member
Re: filament sensor issues - updated part coming in may...



Prusa contacted me and said they are sending me a new sensor. I suspect they have the new ones in and that is why they are trying another sensor. They did not say it was a new version, but we shall see.

pix when you get it will be greatly appreciated.

I will take a pic of the old sensor next to the one I get, that way they can be compared.

Posted : 04/05/2018 7:07 pm
CybrSage
(@cybrsage)
Honorable Member
Re: filament sensor issues - updated part coming in may...

As a note, it has not yet shipped. I will update when it ships so everyone knows the timetable.

Posted : 07/05/2018 6:33 pm
sean.h8
(@sean-h8)
Honorable Member
Re: filament sensor issues - updated part coming in may...


As a note, it has not yet shipped. I will update when it ships so everyone knows the timetable.

Prusa just shipped me a "new" filament sensor today. If there's anything different about it, I'll post a picture.

Delivery estimate is Wednesday.

Hi, I'm Sean. I used to work on CNC machines.
I try to not make mistakes, but the decision is YOURS.
Please feel free to donate to my filament/maintance fund....
Posted : 08/05/2018 1:20 am
keithywhites
(@keithywhites)
Trusted Member
Topic starter answered:
Re: filament sensor issues - updated part coming in may...

i asked chat a few days ago and they said its still not out yet, hope the one you get is updated and fixes the issue.

Posted : 10/05/2018 5:16 am
sauli.k
(@sauli-k)
New Member
Re: filament sensor issues - updated part coming in may...

I ordered my Prusa i3 MK3 kit February and received it on 30th of April. I did handle the sensor with due care, all the connections have been checked, the cable is not faulty and I do get the selftest Error: Please check: Filament sensor Wiring error. I contacted Prusa 8th of May about the issue but have not received a reply.

Posted : 10/05/2018 7:55 am
CybrSage
(@cybrsage)
Honorable Member
Re: filament sensor issues - updated part coming in may...

I would concur that the new one is not yet out. I received another sensor and it is exactly the same as the ones that do not work. Maybe I they tested it and showed it is not failed, which is why they sent it. I am 28 hours into a 36 hour print, so I have to wait to install it. Here is one of the two failed sensors I already have, sitting next to the newly received sensor. Failed sensor is on the left (or bottom, as it appears on my browser), newly received sensor is on the right (or top, as it appears in my browser). They are both Rev 2, I expect the new version will be Rev 3.

Posted : 11/05/2018 5:02 pm
CybrSage
(@cybrsage)
Honorable Member
Re: filament sensor issues - updated part coming in may...

I installed the newly received filament sensor and it works perfectly. For the first time, I was able to turn on the filament sensor and use the auto load feature. i was surprised by how much filament it pushes through, considering the manual load does no such thing.

Third time is the charm!

Posted : 12/05/2018 4:48 am
keithywhites
(@keithywhites)
Trusted Member
Topic starter answered:
Re: filament sensor issues - updated part coming in may...

good that its working now, but i was really hoping it was the new sensor. what can you do. im not sure why they did not offer to send me a new one now even if it isnt the updated one.

Posted : 12/05/2018 6:01 pm
DenS
 DenS
(@dens)
Re: filament sensor issues - updated part coming in may...

New sensor is rev 0.2e. Don't know if i can share a picture, but it's working fine 🙂

Posted : 12/05/2018 6:45 pm
ed
 ed
(@ed-3)
Reputable Member
Re: filament sensor issues - updated part coming in may...


New sensor is rev 0.2e. Don't know if i can share a picture, but it's working fine 🙂

Did you sign an NDA or something?

Posted : 12/05/2018 9:35 pm
jake.m3
(@jake-m3)
Eminent Member
Re: filament sensor issues - updated part coming in may...

Haha

...
Posted : 12/05/2018 10:55 pm
TJH
 TJH
(@tjh)
Eminent Member
Re: filament sensor issues - updated part coming in may...

The files for 0.2e are on github.
The main benefit is the addition of a fuse, so a bashed sensor won't melt the extruder.
They also added a resistor as recommended on the sensor datasheet (but forgot a filter cap).
Should work better, but I'm not sure how to get one.

Posted : 18/05/2018 3:03 am
motocoder
(@motocoder)
Trusted Member
Re: filament sensor issues - updated part coming in may...


The files for 0.2e are on github.
The main benefit is the addition of a fuse, so a bashed sensor won't melt the extruder.
They also added a resistor as recommended on the sensor datasheet (but forgot a filter cap).
Should work better, but I'm not sure how to get one.

If you check the schematics, the only changes are the fuse and that 200K resistor. The 200K resistor and the missing filter cap is (as I suspect you know) there to filter the reference voltage going into the LSF0102 level translator. The level translator is there to adapt the I2C signals from the microcontroller.

The fuse is a good idea, although it should have been on the Einsy board (but I totally see how they can't do that now). But I don't see how either change will reduce false positives.

Posted : 20/05/2018 3:43 am
Page 1 / 2
Share: