ACME or M8

So I had to reconfigure my Easel and now I do not know if I have acme or M8 rod? Anyone know how i can find which I have?

Well I am a dummy because I am clueless which one I have, I have threeaded rod, but threads are flat not round, and is smooth?
Also not sure if I use X-Controller or Arduino controller? I set my machine up a year ago, and Easel has since updated, and now my setting must not be right because I am carving and it does not do correct cutting.

acme:
http://www.acmethread.org/wp-content/gallery/acme-threaded-rod/800px-acme_thread.jpg

normal:

Awesome thanks, Acme it is :slight_smile: And X-Controller also. :slight_smile:

and all of that at your fingertips if you would have typed 2 words in google!

Why not look at your invoice?
They list it there and there is a price fifference