Dreaming Question On Ohmic

I bring this crazy question and hope its already been done. A few days ago I saw a fibre laser run along and sense the layout of the material. Is it possible to get a similar function using ohmic, in allowing contact to be made and run along the sheet till the signal drops off? or better yet pick up a signal when its a smidge above the material so as to not run a grove in the metal and damage the tip?

I don't think dragging the torch on the plate is a good way in achieving the shape of the plate.
I think I saw someone making this with opencv. I would assume it’s way faster and you can see also “gaps” from example already cut parts.

Ya that's why I said or Better yet. I'm sure the fibre laser is using some form of ohmic as it doesn't touch the sheet I'm just not familiar enough with ohmic to know if it begins to receive a partial signal before it even makes contact. Ill look to see if i can find this opencv info

I don't think so. The laser heads have capacitive height sensing built into them so they can read cut height without ever needing to probe and touch the surface.
Ohmic sensing uses  a physical probe and does not give that continuous height reading.

CopperHead wrote:

Ya that's why I said or Better yet. I'm sure the fibre laser is using some form of ohmic as it doesn't touch the sheet I'm just not familiar enough with ohmic to know if it begins to receive a partial signal before it even makes contact. Ill look to see if i can find this opencv info

With ohmic, touching the surface acts like a switch so its either on or off.

Ok. I wasnt sure if there might be a slight reading before touch. Couldn't a hall sensor be used to read height above material? I know when i was in the concrete industry we had laser sensors that would measure distance and turn off feed belts when a hopper was at a certain level of concrete.