Filament sensor for sovol and others

thingiverse

This is 100% my design. This is my idea for a filament run out sensor. I wasn't happy with the Chinese filament sensors. They are difficult to guide filament through and add a decent amount of friction. This sensor uses a 10mm ball bearing and a switch with a wheel to reduce friction. It also has a better designed filament guide allowing fillament to be loaded and unloaded with ease. I have designed a print in place pivoting mount for the sv06 and sv06+. It mounts undere the stock spool holder using the original screws. I have also created an ender mount for my friends printer but have not tested it yet. All pieces are press fit. No screws necessary. Some soldering is required. I will be selling these complete for people that are not interested in building it.Required materials;-roller micro limit switch kw12-3-10mm od, 5mm id, 4mm bore ball bearing mr105-2rs -Mini Micro JST 2mm 3-Pin Female Connectors Plugs with wires and the male plug to match for the sensor-2.54mm JST Connector 3p female with wires to plug into the motherboard-(Optional) 1.25mm micro jst connector 3p female if you prefer to plug into the hot end.Start by bending the outer wire tabs on the limit switch to the inside. You can cut off the middle normally open(no) pin as it is not used. I solder the normally closed(nc) pin and common(c) pin of the limit swith to the two pins on the male 2mm micro jst connector that align with the red and black wires on the female side. I solder the male 2mm jst connector directly to the normally closed(nc) pin to hold it in place and use a wire to jump the other 2mm connector pin to the limit switche's common(c) pin. Solder the black and red wires from your female 2mm micro jst plug to the black and white wires of your female 2.54mm jst plug(or optional 1.25mm jst plug). The YELLOW WIRE IS NOT USED. DO NOT CONNECET YELLOW WIRES. Now finish installing the switch and plug that are soldered together into the housing. You can slide a piece of filament through to hold the switch while you install the bearing(filament guide hole may need cleaned if filamment does not pass through smoothly). Now run the filament in and out and listen for the switch to make a cilick. If the switch is not clicking bend the tab on the switch untill it clicks when adding and removing filament. Use a multimeter to test for resistance between the red and black wire. With filament in the sensor and the switch closed there should be an open load between the red and black wire. With no filament in the sensor and the switch open there should be a low resistance load between the red and black wire. Once you have confirmed your sensor is working as it should install the face by lining up the pegs and firmly pressing it in place. Partially insert the sensors hex shaft into the recieving end of the mount and twist firmly to break free the print in place bushing. Once broken free libricate the bushing.Install the sensors hex shaft into the mount by pressing firmly. It is best not to press it all the way in leaving a small gap to allow more free movement. Mount the sensor under the spool holder of the sv06 using the existing screws. Plug the sensor into the motherboard and update firmware if necessary.