I built a 4 axis stepper driven sampler from a chinese engraving machine. The fourth axis runs a peristaltic pump to collect the sample. The other axis position a dosing tube over one of 144 test tubes and the drain pipe between samples. I wanted it to operate without a PC at a job site so I used a $200 standalone CNC controller programmed in G-code. It actaully works very well and has run 24/7 for about 4 months pulling a sample once an hour. Could I do this with a BRX instead? There is no need for more than one axis to run at a time, and it doesn't need to be fast. The advantage would in making it much more user friendly than the G-code allows. How simple can this be? I would also need a very minimal HMI to set spacing of tubes, start time, tine between samples etc. I ask because this might become a product for us. Our alternatives currently are $12,000 or $40,000!