High speed cameras enable humans to view welds in incredible detail because they capture and distill welding phenomena like droplet detachment and defect formation.
The Canadian Centre for Welding and Joining offers a great online selection of videos made with two models of Phantom camera. For example, see this mesmerizing video of GMAW of steel showing globular transfer captured at 3000fps.
While high speed cameras produce amazing images of welding, they generate huge amounts of data. The practical data limit results in a tradeoff between resolution and frame rate. The higher the frames-per-second, the lower the resolution and vice versa. Also keep in mind that higher speeds mean shorter weld durations – you might only get to record 2 seconds of welding at the highest speed.
Most high speed cameras will let you select where along the frame rate vs. resolution continuum you wish to record. For example, this video of MIG welding was made with a Photron camera at 10,000 fps and 640×744 pixels resolution.
When it comes to high speed, how fast is fast enough? It’s possible to record welds at 10,000+ or even 100,000+ fps, but for most applications, 1000-2000 frames per second will allow you to view welds in sufficient detail for process parameter development or troubleshooting purposes.
If you are looking for a welding camera that captures video at higher than standard analog speeds, feel free to contact us for free advice on selecting a camera system and determining the appropriate frame rate and resolution for your application.