RE: Filament Sensor Indicator

LOL.  Yeah that would work but really hard to solder.  I used parts I had laying around so not really sure which size they were but I'm guessing M2012 metric based on the following chart:

RE: Filament Sensor Indicator

Posted by: TickTock

LOL.  Yeah that would work but really hard to solder.  I used parts I had laying around so not really sure which size they were but I'm guessing M2012 metric based on the following chart:

Thanks Ticktok, that is *super helpful*.

I  have M0402s, the smallest in the list!

and about as easy to see in real life as in the picture.. DANG!

.. back to ebay to get some M2012s!!!

cheers,

Kieran

RE: Filament Sensor Indicator

and one more question -- the LED?

RE: Filament Sensor Indicator

Posted by: kieran.s4

Tick-tock

It'd be awesome if you could provide some part numbers or something.

I'm not familiar with smds and I ordered some 1k's and there about 1/3 the size of yours! Significantly smaller than the diameter of 1.75mm filament. Maybe 1mm absolute max .

Cheers

Kieran

 

How about a re-quote of the actual mod from Bunny and Bear: https://bunnyscience.dozuki.com/Guide/Bunny+and+Bear+(BNBSX)+MKS3+Geared+Extruder+Assembly/2?lang=en#s84

See step 33, It has the LED and SMD resistors listed.

RAH

RE: Filament Sensor Indicator

Or just post it here, like, directly on the Prusa official forums, in the mmu2s section, in the mods zone - in a topic called filament sensor ir mod. Where every owner can find it.

I'll go and find it then, and post it here.

RE: Filament Sensor Indicator

I don't know if this is what tick-tock used, because this is paired with 0.5k resistors, not 1k like tick-tocks.

1206 SMD LED Diode Mini Chip 3.2mm x 1.6mm for PCB DC 20mA

= 3216M.

I have 1210 leds, so should be ok, hopefully.

Cheers

K

RE: Filament Sensor Indicator

Posted by: kieran.s4

I don't know if this is what tick-tock used, because this is paired with 0.5k resistors, not 1k like tick-tocks.

1206 SMD LED Diode Mini Chip 3.2mm x 1.6mm for PCB DC 20mA

The resistor value has a wide range of acceptable values.  500Ohms or 1K will work  (1K or 2K total).  Even 10K is visible but a bit dim.

That is a very nice write-up - kudo's to the author for the detailed instructions and providing specific parts.

RE: Filament Sensor Indicator

Posted by: RAHRAH

How about a re-quote of the actual mod from Bunny and Bear: https://bunnyscience.dozuki.com/Guide/Bunny+and+Bear+(BNBSX)+MKS3+Geared+Extruder+Assembly/2?lang=en#s84

See step 33, It has the LED and SMD resistors listed.

RAH

Thanks for the link,  it appears I no longer have edit rights to my OP or I would add it to the top of this thread.  It is a very nice write-up with some specific parts listed (versus the random parts I used).

RE: Filament Sensor Indicator

Posted by: TickTock

  it appears I no longer have edit rights to my OP or I would add it to the top of this thread.  It is a very nice write-up with some specific parts listed (versus the random parts I used).

I agree. I also hate these new forums. You basically have 5 minutes to edit a post, and then it's locked in! It's daft.

Thanks RAH, I probably came off a bit snarky there. I do appreciate the link.

RE: Filament Sensor Indicator

Indeed a nice mod, though I don´t understand why prusa isn´t putting the sensore status on the LCD at all time. A software mod of this type should be by far easier than a hardware mod. Anyway, this is a great workaround I´ll add too, once I have a good idea for a mod that works seriously with flexible filaments.

RE: Filament Sensor Indicator

Posted by: thomas.m83

Indeed a nice mod, though I don´t understand why prusa isn´t putting the sensore status on the LCD at all time.

Actually I think the question is why Prusa didn't add an LED indicator to the IR board to begin with. Simply always displaying the IR/FINDA/PINDA states on the display leaves you at the mercy of the software which could be buggy (I believe there was an issue with the FINDA getting out of sync that was recently fixed) or limited by it's refresh rate.

Having the LED indicator means that you only care about looking at it from the firmware side if you think there is a disconnect between the sensor's actual state and what the firmware believes it to be.

RE: Filament Sensor Indicator

Hi Guys, I edited the first post to include the link on Tick Tock's behalf,

regards Joan

RE: Filament Sensor Indicator

This is great, thank you. Mine keeps coming loose. I think I have had three successful single color prints since I upgrade from MK3 to MK3S and no successful multi color prints.  Looking for some upgrade to hopefully fix some issues. 

RE: Filament Sensor Indicator

The LED mod works great. Very helpful when you cannot get the information via the LCD menu since the LCD is telling you there is an MMU load failure with no option to discard the message.

RE: Filament Sensor Indicator

Great idea. I didn't have the fancy smd resistors and LEDs but i took your idea and just soldered up a regular 1K resistor to a full size LED and while it looks nowhere near as nice since it isn't all tucked under the plastic - functionally it does the same job. I didn't realize how important direct feedback was to adjusting the filament sensor but it makes it so much easier to get the adjustment down. 

RE: Filament Sensor Indicator

Posted by: @sam-s7

Great idea. I didn't have the fancy smd resistors and LEDs but i took your idea and just soldered up a regular 1K resistor to a full size LED and while it looks nowhere near as nice since it isn't all tucked under the plastic - functionally it does the same job. I didn't realize how important direct feedback was to adjusting the filament sensor but it makes it so much easier to get the adjustment down. 

Indeed. Prusa really needs to start adding it directly to the boards. The menu status is just not good enough.

I used to suggest that after working on the extruder that you disable the MMU and print as a plain MK3S until you can get through a test print with no false positives from the IR sensor. Since adding the LED, however, I find I don't need to do that anymore due to the feedback being much more direct. Now the LED mod is my first suggestion to people having MMU issues (I even have a spare already soldered that I offer to swap locally if someone isn't comfortable/able to do it themselves).

RE: Filament Sensor Indicator

Glad I could help Guys!

regards Joan

RE: Filament Sensor Indicator

@gnat

Would you be willing to sell an LED modified IR sensor?  My soldering skills are terrible. 

RE: Filament Sensor Indicator

This is a great modification, and as such, I got inspired to make this other one for the FINDA sensor. Although the sensor has an LED inside on my layout is very hard to see so I come up with this: MMU2S FINDA Troubleshooting Aid or at Thingiverse: 4286871

I hope it is useful for somebody else.

RE: Filament Sensor Indicator

Welcome to the Revolution! Lol...
Led's make diagnosis much easier. 

regards Joan.