Limit Switches and E-Stops, The Ultimate Guide

This video will serve as a guide to how limit switches and emergency stops buttons/switches work, and how they are connected.

The Kaiweets Multimeter shown in the video can be purchased here:
So far, I am liking this multimeter and you will see this multimeter in future videos.

The equipment and software shown in this video can be found at:

Mach3 Software:

Proximity Switch:

Mach3 USB Controller:

Pokeys57CNC Controller (Mach3 and Mach4):

My thorough discussions on switch bouncing.

#cnctutorial #cncrouter #limitswitch #emergencystopswitch

[PatrickHoodDaniel]

Thnaks for watching this video. If you have any questions, or comments, please post them below. As I said in the video, I will remake the video from comments that affect the content of the video so this video can be relevant at any time. If you want to see more detailed videos on each of the limit switches and e-stops, I will be creating them soon.

[CornusFlorida]

Subbed. The timing of this video is perfect I’m wiring up my rockers and Estops on my enclosure. Hunter Whites design. I like the concept of the constant updated videos.

[pranavmestry]

Thanks for helping me !
I can complete my cnc by watching and understanding your video.
Thank you so much sir!

[willi]

I want more of what happened at 24:55 🥰

Great video, thank you 👍🏼

[SegoMan]

Informative video!

6:11 You should do another video on the repeatability / accuracy on the various styles of limit switch's. The longer the lever the less repeatable / accurate the switch is.

[joemoffatt]

Very easy to understand, good video. I have a couple of comments. Can you explain how to configure the controller limit switch (mechanical) to accept a low or high input?

[bmmacoh]

Nice video with lots of information. I have not found any video of yours showing how to connect the z- probe using the bitsensor controller card and mach 3. Thank you in advance.

[trevorjenkins]

Thanks for the video.
What about opto switch for X Y and Z.

[ploegmma]

I think you should connect the shield at only one point (to avoid ground loops).

[Enrx]

Interesting information Thank you for sharing it …
I have a point … i built my CNC plasma and I got EMI issue… i do my research and figured how to wire it .. exactly like you say but except the grounding it should go to earth capper bar and in to the earth AC ground rod … i don’t know if it gone work cause i still not wired my cnc yet.

Thank you so much for the video.

[johnbowden]

On my torch lifter I have 3 switches. One is a home switch with two limit switches. I have a 4 pin aviation plug connecting for the torch lifter housing. I want to use a 4 conductor shielded cable for wiring all three switches coming out of the torch housing. Would it be acceptable to jump the ground on the home switch to the ground on the limit switches with the shielded ground? That way I would be using the shield wire for all the switches.

[RobKernahan]

Great Vid, thanks. Regarding proximity switches, I am considering using 2 on each of the X & Y axis, and 1 on the Z axis. Can they both be connected together at the controller input? Cheers.

[ard]

Sir,
Please make cnc single line emergency circuit video

[enabledintergers]

The cat is saying your being camera shy, and you never behave like this?'since you always play along with the wire game!!

[undaya]

You have to disassemble switch to mount. How?

[fvheel]

I am using a "bl-usbmach v2.0 d1712" board. It has the folowing connections: GND, In1-Estop, In2-Probe, E3-Limit, In4-Home, In5-Reverse.
I have 6 endtops. 2 endtops per axes in seris.
So i only have one Endtop connector on the controller but i also have a Limit-connector.
What are the differences in theese 5 connections?

This is how i think i should connect my endstops:

ENDSTOPS

| | | |
X Y Z axes |
GND GND GND |
E1 E2 E3 E4 E5 E6 |
| | | | | | |
|
| | | |
In1 In2 In3 GND


Question 1:
In one youtube video he has 3 endstops, X, Y and Z.
He connected all endstops in series so like this:

axes X Y Z
+ E1 E2 E3 GND

How does Mach3 know witch axes will be trigered?

There is only one connection for all axes witch i think is not how it should be.

I think that every axes should be seperated on one side of each axes.


Question 2:
The only ground on my cnc is on the powersuply 220v.
Can i connect every Ground (and also the Shield of the wires) to the Ground of my powersupply (220v)?

I only find information on how to shield your cnc but no info on how to connect shielding in your electronic-box.
So a lot of these tutorials are not complete i think.
If you show info about shielding then show everything from wiring to connection at the source.

[WillemvanLonden]

I used shielded cables on all my switches, and on my motor. Still I am experiencing EMI-issues. I am now converted the connections of my switches to the terminals to an opto coupler situation. Hopefully the issues will be gone.