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This video is about the #reference run function in #Estlcam, how to connect and configure #limit switches, and why you should use normally closed contacts. ~~~ If you liked the video and it was perhaps helpful, then you can support me and my channel as follows: Amazon Wishlist: https://www.amazon.de/hz/wishlist/ls/... PayPal: https://www.paypal.me/HaraldHartmann78 Channel membership: / haraldhartmann Additional information: in some places you don't have to reprogram the control, but it's better to program it once more than to then wonder why one setting or another has no effect. in order to be able to use the limit switches used in the video as NC, the resistor R2 must be desoldered! 1:30 ... of course you can use a separate input for each limit switch and name it X, Y and Z if it helps to keep track of things ... for estlcam, however, that doesn't matter and it is not a should/must condition as many have suggested! 6:46 ... of course the normally open contacts (NO) can also be placed on one input, but then not in series, but simply in parallel. Cross-references mentioned in the video: Nachdenksport and the crash of his MPCNC: • MPCNC: The first project & the first ... Sebastian End ( / @sebastianend ) Christian Knüll ( / christianknuell ) Christian Knüll's forum post: https://ubo-cnc.de/cnc-forum/showthre... LowCostDIY500EuroCNCMill: https://www.instructables.com/id/LOW-... MPCNC Nano Estlcam Shield aka Tillboard: https://github.com/tnn85/MPCNC-Nano-E... (please note the license: for private use only, no resale!) Daniel Badberg ( / duke2478 )