Comments sought on new build: A CNC Router for RC Gliders and Planes

[routercnc]

Cheers, just thought that as long as the joins soldered ok then there's no potential at the join for a loose connection.

Next question! I'm going to get a safety relay (probably a second hand Pilz from ebay) for estops, limits, home switches etc. What's a good model to get, I've seen some Pilz PNOZ X3's which seem to fit the bill?

I'm not going to talk you out of a Pilz style relay as I looked at those as well and was impressed. However, I will mention that a level of safety interlock can be achieved with a cheap multi (4) pole relay - mine was about £8 and has the option of DIN mounting:


One of the poles can be used to form the latch, and the rest are free to switch whatever you need downstream. However, if you don't mind the expense then the Pilz system is neat is and is what the industry seem to use.