I didn’t like the filament runout sensor that I had purchased early on in my 3D printing days, it was based on the ender style end stop as it seemed to add some resistance. It could get annoying when changing filaments especially when changing to a different colour whilst attempting manual multi-colour prints.
I wanted to put the runout sensor nearer the toolhead so I get to use up more of the filament before the sensor triggers, yet keep it lightweight enough so it doesn’t add momentum or add any additional movement while the toolhead moves around at higher speeds.
I didn’t want to be reliant on any hardware like screws or bolts to attach it so as to keep weight down. I even decided to forgo the bowden coupler, resorting to making a tapered hole from 4.28mm, and relying on forcing the PTFE tube in so that friction and a not-so-smooth printed surface secured it.
Weighing only 3.66g with a hole for an allen key to be inserted, keeping the sensor inactive when changing filament mid-print until I’m ready for the print to continue.
Currently undergoing vigorous testing on my mercury one.1 printer with no issues so far!
It’s still a work in progress… but if you have the exact same microswitch, feel free to download it and make one yourself.
Since I did purchase a multi-pack of sensors, which I won’t be needing, I may make a few more and sell them.
If you’re interested, get in touch via the contact form and I will post one out to you.