Hi,

I bought a CNC 3018, I would like to install limit switches.
According to the manual, this should be on the points: Xend Yend and Zend
These are make contacts, to which I have connected the limit switches.
Unfortunately they don't work.
Above the mentioned connection points are X+X- Y+Y- Z+Z-
What should I connect the limit switches to, without damage?

I entered the command: $21=1
Checked (with $$), the command was accepted.
What are the correct connection points?
What are the commands?


Suppose I blow up the Arduino Nano.
Then a new Nano must be placed, but how do I get the sketch that is currently in the Nano?
Where can I download the source code?
How do I read the (binary) code currently in the Nano?

Many thanks in advance for your reply

Regards, Dré Jansen