Hi Guys
Im trying to make a spring loaded engraving tool for pcb's
It is to be the type that has a shaft and fits in the spindle, basically an 8mm shaft with a chamber holding a spring, and then a sort of collet system that holds the engraving bits, the collet section can move up and down.
However the problem im having with the design is making sure that the collet section cannot rotate independantly of the main shaft, but it does need to move up and down.
Now the most logical way I can think to do this is to have 2 slots in the shaft and then tags/ears or whatever you want to call them on the collet section, so it can move up the slat, but not rotate.
Now I have a Taig CNC Mill and a Manual Sieg C3 Lathe.
How do I make it? I was going to turn the shaft and bore it out etc on the lathe, but how can i make the slats? obviously it will be on the mill, but how can I ensure that it starts cutting ont he highest point of the radius?
Does that make sense?
any advice greatly appreciated. Im kind of a newbie btw.
DJH