Question re filament detection
I havent received the MK4S I ordered yet, but wondered the operating mode of the sensor. Is it an optical switch, or is it a limit switch of some form. I know that each have their individual pros and cons in use.
As a control engineer, I worked in paper mills;My company was using computer-based control systems in the 1970s, before their use was common. One of the sensors they used to measure the mass of the paper being produced continuously - for most paper, they used a radioactive source (krypton 86) usually above the paper web. And a radiation detector under thw sheet. The heavier the paper, the less radiation would be detected.
Smoke detectors also use radiation to detect smoke in the air. I believe an isotope of americisium is used. A tiny amount of a radioactive isotope, shielded of course, could be used as a missing filament sensor. Ideally, it would be an alpha emitter like tritium, where a sheet of paper could shield you. The sensor could potential
Be used witl all types and sizes of filament, even glass, metal, wood or carbon fiber inpregnated material.
Has anyone heard of radiation being used in this role? An air-gap calibration would need to be periodically done, to re-zero the sensor, as radioactive emissions reduce over time, as it decays naturally..
RE: Question re filament detection
The Mk4S pritner, uses a ball bearing to register filament presence, this interacts with a Magnet and a Hall effect sensor to indicate the presence to the controller board,
the Hall effect / magnet pair, is calibrated as part of the initial configuration.
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK