I have observed that when I first start cutting material, the voltage present on the torch starts out very high. Eventually, it will “settle” to a value that I would expect the the material thickness and torch height. For example starting at 175V and eventually decreasing to 110V. I suspect that the work clamp circuit is exhibiting some kind of higher resistance that eventually reduces to something lower. I have been attempting to ensure the clamp make a good low resistance contact on the material being cut, but this phenomenon ALWAYS occurs for me. Has anyone else observed this type of voltage shift?