Northamptonshire claimed their first Specsavers County Championship win of the season after Delray Rawlins and his Sussex teammates capitulated for the second time in the match to lose by a record 393 runs at The 1st Central County Ground.
Having been bowled out for 106 in their first innings, Sussex were dismissed for 105 in their second. They seemed to be making a better fist of things when Varun Chopra and Luke Wells took the score to 35 for 1 but Sussex then lost nine wickets for 70 runs with Ben Sanderson and Brett Hutton again wreaking havoc.
Earlier, Nathan Buck hit a 59-ball half-century as Northants added a further 119 runs during the morning session before being bowled out for 331.
Resuming on 212/4, they lost their first three wickets to Robinson, who finished with match figures of 10 for 132. His performance was the lone positive for Sussex.
Buck was dismissed two balls after reaching his half-century when he top-edged a pull at Abi Sakande, before left-arm spinner Rawlins picked up two wickets to finish with 10.2-2-34-3.