Sam S. and His Hacked redFrog
When I said you can hack the redFrog, I wasn't kidding.

Diagnosing and Fixing a Non-working Axis
Are you pulling your hair out trying to solve issues with your CNC machine? Maybe the X-axis has decided to play hard to get? Don't fret. In this video, I'll walk you through the intricate maze of CNC electronics, from transformers and drivers to contactors and controllers. We'll diagnose a real-world problem with the X-axis of a CNC machine, using nothing but methodical testing and common sense. So, grab your multimeter and let's turn that blinking error light into a green light of glory.

Torque and Linear Motion Formula
Periodically, I get questions from users of the site regarding torque and how much is required to move certain masses and a recent user emailed me specifically and it gave me the happy motivation to add this page. :) These masses are things like the gantry, or the z-axis assembly with the router mounted moving on the y-axis, or the just the router mount and router within the z-axis assembly. The question is usually in the form of, can my ??? oz-in motors be used on your CNC machine.