The Glamorgan flag was flying at half-mast in memory of former Glamorgan groundsman Len Smith as Middlesex followed on 228 runs behind.
The visitors surprised everyone with Robson and Max Holden racing along at a run a ball for the first hour in an opening stand of 98.
Robson hit seamers James Harris and Andy Gorvin out of the attack with a series of ferocious drives, as they were unable to find the lengths that served them so well the previous day with the former England man racing to a 40-ball 50.
It looked like the T20 Blast had come early, but as Glamorgan switched their attack round, it was left-arm spinner Kuhnemann who made the breakthrough as Holden was well taken at short leg by Asa Tribe for 35.
Robson had blasted 13 fours when he was trapped lbw by Kuhnemann, who then bowled Leus du Plooy, and with Luke Hollman edging Timm van der Gugten to slip Middlesex had lost four wickets for 17.
Glamorgan kept chipping away after lunch with Ben Geddes trying to get after Kuhnemann but being well taken by Zain ul Hassan back-pedalling at mid-off for 12.
Harris’s second spell was a considerable improvement as he got rid of Ryan Higgins for 19 and Zafar Gohar, brilliantly caught by a leaping Chris Cooke.
Kuhnemann completed his five-for as Jack Davies (12) swung to mid-wicket before Roland-Jones launched a magnificent counter-attack, smashing three successive sixes into the grandstand off Gorvin, and speeding to 50 off just 33 balls.
The scores were level when Roland-Jones swung Gorvin to a diving Harris at deep square leg, and fittingly Kuhnemann had the final word when Dane Paterson was taken by Gorvin at mid-on.
Glamorgan knocked off the eight needed in 14 balls as Middlesex ran round to salvage a potential points deduction for their over-rate.
Middlesex now start their T20 Blast campaign against Sussex at Lord’s on Thursday 29 June, while Glamorgan’s opener sees them travel to face Middlesex at Northwood on Sunday, 1 June.
BBC News
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