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The spindles controlled by a VFD are induction motors and the VFD aims to get constant torque down over the full speed range. It doesn't quite manage that, particularly at low speeds. The problem is...

Apart from what Jonathan has said the other thing I was thinking is what sort of size are the cases you want to cut panels out of, if you are talking about a flat piece like the removable side of a...

Making a machine to make PCBs is not difficult since although the accuracy required is high, the cutting forces are low. However for mild steel you need substantially higher rigidity, which is...

This question arises in almost every build log on the forum and every time someone explains why they are unsuitable for most CNC Routers. Here are some simulations I have run to prove the point...
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A Tutorial on motor torque calculations

A question oft asked on MYCNCUK is "how big a motor do I need?". There is no simple answer to this, and the options are usually:
a) follow someone elses...