CNC Home Switch Installation LinuxCNC @kentvandervelden

Uploaded August 2020 | Updated September 2026, 5 hours ago

Home switches are added to a LinuxCNC retrofitted mill to create a convenient and consistent starting position on startup. LinuxCNC then provides software based hard limits for each axis, preventing collisions with axis endpoints, and verifies loaded files are within the work envelope of the machine. With small inductive sensors, the home switches can be tucked away, protected from chips and coolant. While hardware limit switches are meant to save the machine for an expected over travel, home switches are used every time the machine starts and software can be used to simulate limit switches, especially if the position is driven by closed-loop motors. The home switches are attached a Mesa 7i76e board and the mill is a PM25 CNC retrofit.

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Business Inquiries, I'm a freelance scientific programmer: kent@confluencerd.com

Chapters
00:00 - Introduction
01:27 - Machine sensor targets
02:48 - Install sensors and targets
04:12 - Demonstration
04:45 - Closing thoughts

Parts that I used (Automation Direct)
OPT2107 - Wenglor mounting bracket
AHS-CP-1A - Inductive proximity sensor, PNP, N.C.
Q8165-1 - Quabbin control and signal cable, 3 conductors, 24 AWG

https://www.notion.so/Installing-home-switches-6a32047568f443fb822a306c894896d4

#KvvCreates, #LinuxCNC, #CNC

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Plant Drought Recovery Timelapse With Motion Vectors

Machine vision, gauge reading, LinuxCNC probing

$Spectrometer Introduction, Tear-down, and Data Analysis for Plant Phenotyping Spectrometers decompose light into a rainbow of colors and then measure each color accurately. In this video I tear-down a spectrometer, describe the theory, and use of a spectrometer. A recent leaf clip spectrometer is used to for a plant phenotyping application to predict tree lead species. Channel Love: Likes are free. https://paypal.me/KentVanderVelden Business Inquiries, Im a freelance scientific programmer: kent@confluencerd.com Finally, I demo software that Ive written for storing, organizing, analyzing (using PLS-DA), and reporting spectra. If you need help with a plant phenotyping project, let me know, I may be able to help your project. The geranium drought experiment is not fully described due to time. Theres additional background information thats needed for understand water absorption spectra. The device used in the video is not ideal for a drought application and so the results are not clear. Let me know if you would more details. The spectrometer that is tore-down is from Ocean Optics. The leaf spectrometer is from CID Bioscience. A Microsoft Surface tablet is used to power the spectrometer and collect data. CID CI-710 Leaf Spectrometer: https://www.cid-inc.com/plant-science-tools/leaf-spectroscopy/ci-710-miniature-leaf-spectrometer/ Ocean Optics USB4000: https://oceanoptics.com/product/usb4000-custom/ PLS-DA paper (So you think you can PLS-DA, Ruiz-Perez and Narasimhan): https://www.biorxiv.org/content/biorxiv/early/2017/10/21/207225.full.pdf Other PLS resources: Properties of Partial Least Squares (PLS) Regression, and differences between Algorithms: http://www.eigenvector.com/Docs/Wise_pls_properties.pdf A survey of Partial Least Squares (PLS) Methods, with Emphasis on the Two-Block Case: https://www.stat.washington.edu/research/reports/2000/tr371.pdf Diffraction grating explanation: https://www.youtube.com/watch?v=F6dZjuw1KUo https://www.youtube.com/watch?v=U02-O5Z9E6Y #KvvCreates, #Science, #Spectroscopy$

GAN (Generative Adversarial Network) Progression