CNC 3020 Enclosure/Upgrade

[Pointy]

CY cable
Cy Cable Per Meter 4 core 0.75mm (0.75mmX 4 Core CY Cable) ONLY £0.48

Energy Chain
Cavotec - Nylon Products
igus® plastic energy chains®

Thanks for the links Ed.

I must have had a real brain fart when I did the charge pump circuit above. Apart from getting the PC power connector the wrong way round, and a couple of other small errors, I made a major mistake with the relay. It's SPDT, so the above circuit makes a direct short across the 24v input, whoops! There's obviously a very good reason for bench testing circuits first, and fortunately I always have the current limiting control on my bench supply turned way down in the milliamp range, so no damage was done. Anyway after a quick couple of tweaks the circuit worked beautifully on the breadboard, I have only tested it connected straight to the BOB, so I just need to make sure it works, through the opto-isolators on the IO board

Here is the second version of the PCB...



Regards,

Les