Hi there, yes, you figured me out. I'm a radio communications enthusiast.

Not getting anywhere with my 3018 ebay seller though. Might have to give some negative feedback on ebay,

Thanks Richard. I already swapped over the stepper driver modules and the problem is definitely that one of them is defective. However, that is a a bit of a secondary consideration until I get the Y axis assembled properly. Still working on that.

Cheers,

Paul