Mechanical chain wear indicator
grabcad
In short: 1. Its a realtime monitoring system 2. Used only mechanical elements. 3. All mechanics are "solid-state" :) 4. Summary cost of elements no more than 10 dollars How it work: Principal element - spring from special spring steel. On a one hand this spring flexible, on other - its spring. (detail in pictures) Switching element - hi voltage reed switch (two principal advantages: cost 1 dollar and 'dry contact', due to its mechanical nature), which directly connected to internal hoist electric circuit (plus lamp for indication and resistor if need). Two cad model attached - first is productional variant, second - testbed. Productional variant have an air gap between spring and chain (1 mm). When wear progressed chain eat gap. Maybe gapless variant will be more advanced. And sorry for my english:)
With this file you will be able to print Mechanical chain wear indicator with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Mechanical chain wear indicator.