Originally Posted by
Edwardo
Negative on that.... the torch lowers and touches the metal before firering, it does this to find the top of the metal, height will vary with different thicknesses of metal, then rises to a pre-set peirce height, then fires and blows a hole through the metal, then the torch lowers to the pre-set cutting hieght and continues cutting... this all happens within a very short period of time... with thicker metal you can also set a peirce delay to ensure that the hole is completely blown through the metal before the torch begins to lower to the cutting height to avoid the splash back of molten metal into the torch nozzle. Ideally with my torch and cnc, you never want the torch to touch the metal when it is peircing or cutting, it will ruin the nozzle and possible the the electrode inside... which is the least damage that can occur.... check youtube and seach Dynatorch... there are videos that show the cnc plasma torches working, you will see what i mean...
EDD