Glamorgan closed Day 2 on 52/2, after a career-best 4/18 from Andrew Salter helped dismiss Northamptonshire for 215 on Day 2 at Sophia Gardens.
Finishing with 4/18 from 10.3 overs with four maidens, Salter demolished the visitors' lower order as they collapsed from 181/4, and Salter was 'delighted' with his work during the innings.
"It was a good day in the office, really enjoyed myself because as a bowler you always appreciate the good days where those chances go to hand, delighted with the day.
"The wicket is a good one and I just wanted to keep things nice and tight, and see if there was some assistance since part of my role is building pressure, so it was ideal that when they did take those chances it paid off in my favour
"It's been a shame the weather has interrupted things later on in the day though the groundsmen did an excellent job for us to start so early with heavy rain overnight.
"We're going to try to bat big and put some pressure on them for their second innings, but we're in a good space."