Adding Limit Switches to 3018 CNC Machine

Here’s how I added some limit/homing switches to my 3018 CNC machine.

Parts Needed

• 3D printed mounts - Thingiverse
• Micro switches w/ long lever (V-153-1C25) - AliExpress Affiliate
• Dupont connector kit - Aliexpress Affiliate
• Heat shrink tubing
  – Optional –
• Micro switch w/ roller - AliExpress Affiliate

The (Short) Guide

I think that @Bracketracer’s guide on Thingiverse is very detailed and easy to follow. Instead of repeating it, I’ve decided to only include the parts I did differently and add a few extra pictures for detail. I should also note that I forgot to print out the mirrored versions of the mounts and decided to make due with my mistake.

Z Home

I decided to mount roller-style switch for Z home on the C-shaped part of the z-axis instead of going directly on the tool clamp as shown in the guide. This way, I don’t have to bend the lever arm or drill any holes into the tool clamp. The switch was first mounted in the printed part, then the assembly was super glued.