apparel-machinery - Question and answers

We recently installed a Juki MO-6700 overlock machine in our garment production line. I've already checked and adjusted the thread tension to standard levels and verified that we're using the correct needle type (size 90/14). However, puckering persists, particularly when sewing at higher speeds or with cotton-polyester blends. I'm looking for specific machine adjustments or preventive steps to resolve this.