Hi Tom,
When I try to run on the scope [laptop] CdC/EQmod stop responding, tracking will continue and so will a slew. The set up is fairly straight forward. The Astroeq is bolted on to the nylon pillar head. Cables from here up to the motors. USB cable to laptop on a trolley beside the pier. The power lead runs down to the power supply on the floor. Tried all three USB ports on the laptop and same response.
Moved indoors.
PC under desk. Power supply beside it. Astroeq on desk beside motors. Works without fail. Ran this afternoon, slewing and tracking. 3 hours plus, no problems. I agree that the USB cable is OK, but I think the fault is with the laptop. I'll try using an active USB so I can get from the PC to the Astroeq when mounted on the pier.
Thanks for the help.