Prusa MMU2s F.I.N.D.A. Troubleshooting aid

Prusa MMU2s F.I.N.D.A. (filament detection) Troubleshooting aid

The best way to quickly troubleshoot what is going on in a machine is to have all sorts of indicators at different stages of the process.
After adding the wonderful MK3s+MMU2s Filament Indicator Cover from Mykal451 I thought it would be very interesting to have another one for the FINDA sensor. The sensor has an embedded LED but is not bright enough in my opinion. I tried to find a design specifically for the F.I.N.D.A. sensor with no luck, so I decided to create one myself.

I used some electronics I had around:

• 2 x 3 pin header (connection to the board and FINDA)
• 470 Ohms resistor
• 12k Ohms resistor
• BC548 Transistor (general purpose transistor)
• 2 pin header (connection to LED)
• green LED
• misc. wires

• PCB
  Basically the board splits the FINDA sensor connector, so the sensor and a simple on/off circuit can operate an LED in parallel. This LED then can be mounted for example at the sensor itself using the design posted.
  The sensor sets its signal (black wire) to 1 when the filament is detected. I could have just connected a resistor an LED to the signal, but I rather spend 10 more minutes and isolate the signal just in case.

  Enjoy!

Print instructions

Unassociated tags: F.I.N.D.A.

Category: 3D Printer Accessories Summary

Prusa MMU2s F.I.N.D.A. (filament detection) Troubleshooting aid

The best way to quickly troubleshoot what is going on in a machine is to have all sorts of indicators at different stages of the process.
After adding the wonderful MK3s+MMU2s Filament Indicator Cover from Mykal451 I thought it would be very interesting to have another one for the FINDA sensor. The sensor has an embedded LED but is not bright enough in my opinion. I tried to find a design specifically for the F.I.N.D.A. sensor with no luck, so I decided to create one myself.

I used some electronics I had around:

• 2 x 3 pin header (connection to the board and FINDA)
• 470 Ohms resistor
• 12k Ohms resistor
• BC548 Transistor (general purpose transistor)
• 2 pin header (connection to LED)
• green LED
• misc. wires

• PCB
  Basically the board splits the FINDA sensor connector, so the sensor and a simple on/off circuit can operate an LED in parallel. This LED then can be mounted for example at the sensor itself using the design posted.
  The sensor sets its signal (black wire) to 1 when the filament is detected. I could have just connected a resistor an LED to the signal, but I rather spend 10 more minutes and isolate the signal just in case.

  Enjoy!

  Print Settings

Printer Brand: Prusa

Printer: i3 MK3 MMU 2

Rafts: No

Supports: No

Resolution: 0.2

Infill: 20%

Filament: Any PETG / PLA your preference