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travel speed was set at 4800
Best of breed firmwares manage to get about 2000 mm/min with your setup. Also, 4800 mm/min would require some 2500 RPM of the stepper motor, likely more than this long threaded rod can handle.
You can set this back to 4800, then find out how fast your electronics manages to crunch the numbers with G1 ... F100, G1 ... F150 ... I'd guess somewhere at 600 mm/min you'll get first dropouts. Reduce this by a safety margin (10%) and set it as the maximum speed. Repeat for each axis. Teacup will make sure these maximum speeds are never exceeded, no matter what G-code you throw at it.