well, it's the same principal as the ones sold by 2linc.com for a lot of money, once the correct spring is selected, although the force is not linear, it seems linear enough in that regardless of height, there is just enough force to go the required depth.
Im going to fit a tensioner in the top so I don't have to keep swapping springs.
Ive never used one before, but i have seen one that was engraving a 22mm copper pipe over about 100 degrees of it's surface, and the depth was the same as far as i could tell, we opened his tool up and it was just a spring and a form of collet.
Hope that makes sense, theres no harm in me trying it anyway
DJH |