Anycubic Predator Internal Filament Sensor Guide

thingiverse

This is a pretty simple modification to the Predator Internal Filament Sensor by NexxCat. I simply rounded the edges of the filament entrance hole and the outer edges of the cap. Instructions from NexxCat's design are the same for this, with the exception that I removed the length of bowden tube entirely in step 10 as it wasn't really needed: Installation instructions are as follows: 1. Print PredatorFilamentGuide.stl, PLA is fine. Make sure to orient the print so that the widest round area is flat on the bottom. 2. Disconnect your printer from mains electricity. 3. Remove the acrylic top cover by removing the 6 screws around its edges. 4. Remove the existing filament sensor, taking care not to damage the connector. 5. Flip the sensor upside down and align it so that the exit hole of the tube is lined up with the entrance hole to the bottom fitting hole. You may have to bend the mount slightly to get them to line up. It helps to have a length of filament that you can use to test that it will go through smoothly. 6. Re-insert the screws from the top. 7. Carefully remove the filament sensor cable from the cable bundle, taking it back up and inside the electronics enclosure. 8. Re-insert the connector into the sensor. 9. Reinstall the acrylic cover. 10. Take the section of bowden tube and cut it to 32mm in length (will also work without this tube at all if your internal print walls are smooth enough that the filament doesn't get hung up and snag). 11. If you keep the bowden tube, Insert the cut bowden tube into the printed filament guide so it is flush with the bottom and just a bit below the slope of the top edge. 12. Insert the printed filament guide into the hole in the centre of the acrylic, ensuring that the "open" side of the guide is facing towards the right of the printer. Please note: I take no responsibility for any damage you cause to your printer whilst carrying out this modification to your own printer. These instructions are provided as-is. NexxCat recommends printing with 15% infill, however since this is basically a non-stressed part, I printed with 0 infill, and instead printed it with 4 outside perimeters and upped the bottom shells to 6 (since the bottom of the print is actually the top of the part). This has proven more than strong enough for my usage. Update 2/21/2020 - v2. Increased the size of the fillet on the edges. They looked fine when designing, but once printed, they were much smaller than expected. Now it's a much smoother look and even easier to get the filament into the hole.