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Filament Sensor Microswitch Upgrade


Gyzmo1012
(@gyzmo1012)
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Joined: 4 months ago
Posts: 2
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I recently upgraded the filament runout sensor microswitch and housing from the unit supplied with the CR10s, which was faulty due to use, to the unit for the CR-10S PRO 3D Printer (which I sourced from AliExpress, link below for reference) - This unit is housed in a red anodised aluminium block.  I mounted the new sensor with a bracket I fabricated so that it is positioned similar to the original sensor.

I have found that when I plugged the new sensor to the main board the blue LED lights up when filament is passed through the sensor.  However when I try to print, the printer keeps ejecting the filament and requests to reload filament.

The pin configuration to both the old and new sensor boards are the same...

Has anyone here undertaken a similar upgrade, and if so encountered the same problem?
What did you do to rectify?

Photo provided for reference - New microswitch board on right...


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Eli liu
(@eli-liu)
Power Supply Customer
Joined: 7 months ago
Posts: 462
 

I have found that when I plugged the new sensor to the main board the blue LED lights up when filament is passed through the sensor.  However when I try to print, the printer keeps ejecting the filament and requests to reload filament.

Does it mean that you can keep printing without any filament in the sensor? It seems like misplaced wires. 


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Gyzmo1012
(@gyzmo1012)
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Joined: 4 months ago
Posts: 2
Topic starter  

@eli-liu

It is not ,misplaced wires.  I have traced both circuits the Yellow Sense wire connected to the original filament sensor reads 0 volts when the filament is detected and on the new sensor it reads 5 volts.  When compared with the old sensor the Blue LED is connected opposite polarity to the new sensor.

See attached diagram.

I am guessing I will need to edit the firmware to fix, but I am new to 3D printing and have never done any programming...


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