Typically your PC talks to your CNC machine via RS232 / Com ports, however newer machines / controls are now being supplied with windows operating systems & USB ports.

If using RS232 generally the cable required for most controls is a DB25 to 9 pin serial & a null modem adapter to fit on either end, these you can get from Maplin or any other electrical store.

This cable works on Fanuc & Mazak controllers & many more.

Less & less new laptops come with com ports nowadays as everything is moving over to USB so always check that your laptop has a com port as standard if looking to purchase one for your machines. I have just ordered 2 from Dell & both do still have com/rs232 ports. If your laptop doesnt have one you can use a PCMCIA to Serial adapter which seems to work with no problems.

You can also try a USB to serial adapter but people are having mixed success with such.

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