Overlocker / Serger | Troubleshooting

What are the most common things to go wrong on Overlockers/sergers? Which things should you check for? Sharyn has been sewing with overlockers/sergers for over 35 years, and teaching on them for about 20 years. www.sharynsdesigns.com.au 0:00 - Intro 00:33 - Threading 02:34 - Threads 04:42 - Switches 06:46 - Differential Feed 07:21 - Needles