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RoBo3D Autolevel via Mike Kelly

by mkelly Jun 1, 2014
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this doesnt have the little plastic piece hat held the thing to the carriage?

Hi, I was just wondering if the modification in wiring is necessary. Isn't two parallel NO connections equivalent to series NC? (except the inversion in the firmware?)

In essence yes. A normally closed circuit is more fail proof as a Normally open circuit has not fault detection.

do these work with the z nuts already on my R1?

As long as you have coupling nuts they will work

Thanks Mike.
My simple question for this auto-level block are following.
1) Is it necessary for place each side of Z-axis setup with this change ?
2) How should I make wiring circuit for 2 sensor ? ( detect short may need parallel, detect open may need serial )

1) It helps because the sensing accuracy is a function of the distance of the nozzle to the switch. So having two helps that

2) Wiring them in series is better in my opinion because then a failure won't result in the nozzle driving into the glass and throwing out the nuts. robo wires theirs in parallel but I don't agree with that

Thanks Mike, so I shall make wiring as parallel for two sensor in 1 port.

Careful about using the coupling nuts from Ace Hardware. At least the ones I bought have an outer diameter of 7/16", not the required 1/2".
Home Depot has the correct ones and are FAR cheaper.

Thanks for the info. Good to know that fact. Seems like Ace stores have varying suppliers.

Thanks for this Mike! One of mine broke and I used a plastic tie to hold it together will I printed the replacement!!!

Question: What microswitches are used? I seem to keep getting the wrong size...

Oh I had missed this conversation.
So I looked through from picture, microswitch shows as no-lever version as my concerned.

Thanks for this Mike, i have been looking and looking for instructions on how to do this. You are a great source of help and im sure the community appreciates all you do as much as i do :).