2. Torch camera and outer camera to watch pool

A compact camera is attached on the welding torch. A normal size camera is attached on the carriage. These cameras capture weld pool condition and torch height.
Interference filters are attached on each camera, so image without welding duration is black.

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（１）A torch camera is used to capture welding pool condition. torch height canbe calculated from arc length. Actual weld pool size can be corrected by arc length.
（２）View size and angle are set before welding procedure.
（３）A normal size camera set on the carriage is used to capture welding pool and arc length. Sizes of arc and weld pool captured by this camera are easy to measure. The carriage moves on the constant speed, so welding rate and variation are obtained.
（４）The torch camera is set for future use. This torch can only be used in actual welding process, so better algorythm to measure welding condition is checked.

(1) View size and position are set before welding under the condition of without interference filter. Best combination of iris and shutter speed are listed on the manual.
(2) The whole camera and bottom view camera under the welding piece mus watch the same position. Check the bottom camera position first. Then set the whole camera position.
(3) A conrtroller of the carriage speed is fixed under the welding table. Choose a suitable welding speed listed in the manual.

Next page　　　2012.02.12open,　2016.7.26revised