Hi all, I'm sure these questions have been asked before but the terms are so generic I can't get answers from the search, so sorry in advance for this.
I've been using a commerical CNC for the past few months and it has made me want to build my own. I've built a Z axis router lift which was controlled by arduino so I'm a little familure with the hardware.
My questions are these, what sort of CNC controller should I be looking at that can take command directly from USB that is suited to a DIY cnc?
How does the CNC machine get its depth right with the bit, the commmercial machine I've been using gets its bits automatically then slowly lowers them onto a touch plate and then works out how long the bit is, what does a smaller CNC machine do to work this out?
Thanks in advance!