This is not based on any kind of research, it is an educated guess based on circumstantial evidence and some science.
As you pulse heat your coils, a layer of insulating oxide forms on the outside of the wire. This stops the electricity from taking a shorter path across any given loop where it makes contact with another. However there will initially be points of contact that are snug enough to prevent this oxidization process, causing electrical shorts.
These short circuited partial loops will be hotter, and deprive other areas of electricity which will be cooler. This uneven heating will lead to inefficiency, and hotspots which can scorch the cotton or juice.
Strumming, tapping or squeezing the coils disturbs these unwanted points of contact enough for oxidization to occur there too, allowing an uninterrupted even flow of current down the length of the wire. A properly setup coil should heat from the center of the coil out.
Contact coils should always be pre-heated and tested this way as it also removes any machine oil or impurities from the surface of the wire.
As you pulse heat your coils, a layer of insulating oxide forms on the outside of the wire. This stops the electricity from taking a shorter path across any given loop where it makes contact with another. However there will initially be points of contact that are snug enough to prevent this oxidization process, causing electrical shorts.
These short circuited partial loops will be hotter, and deprive other areas of electricity which will be cooler. This uneven heating will lead to inefficiency, and hotspots which can scorch the cotton or juice.
Strumming, tapping or squeezing the coils disturbs these unwanted points of contact enough for oxidization to occur there too, allowing an uninterrupted even flow of current down the length of the wire. A properly setup coil should heat from the center of the coil out.
Contact coils should always be pre-heated and tested this way as it also removes any machine oil or impurities from the surface of the wire.
