I am working on a new project using a portable ERW machine, as it’s my first experience  I would greatly appreciate if someone could help me understand the functions of the below control switches and knobs in the 2.2kva ac portable welding machine.
1. Single and repeat switch with a timing control knob.
2. Weld on/off switch with a timing control knob.
3. Weld cycles 1/2 and normal switch with readings from 40 to 100.

Also, how to use it to perform seam welding (to weld a SS mesh with a SS frame) by changing these settings.

Many thanks..