06-13-2016, 06:45 AM
In my (feeble) mind, any jog button simply means that it's an "on" button that must remain pushed/engaged for the entire time it's being used. No lock-up circuit, anything it's doing stops when you let off.
The JOG button I have on my current mill (has 2 axis CNC control) is exactly that. It defaults to being a "rapid" button at 99 inches per minute but there's a +/- button next to it that scrolls through speed choices. The JOG button on my lathe is an on or off and the gear selected determines the RPM that it jogs at. I think I may have used it one time for indicating in (truing) a large round piece.
On this type of milling machine the only place I could potentially see it being used is to indicate a bore. I still wouldn't use it though because it is my policy to NEVER have the gear engaged as long as there's an indicator in, near or within sight of the spindle. You only have to spin a Last Word No.711 at 2000 rpm once to learn that lesson, and I learned it 40 years ago. (I have never done it but was standing right there when one of my high school mates did.)
The JOG button I have on my current mill (has 2 axis CNC control) is exactly that. It defaults to being a "rapid" button at 99 inches per minute but there's a +/- button next to it that scrolls through speed choices. The JOG button on my lathe is an on or off and the gear selected determines the RPM that it jogs at. I think I may have used it one time for indicating in (truing) a large round piece.
On this type of milling machine the only place I could potentially see it being used is to indicate a bore. I still wouldn't use it though because it is my policy to NEVER have the gear engaged as long as there's an indicator in, near or within sight of the spindle. You only have to spin a Last Word No.711 at 2000 rpm once to learn that lesson, and I learned it 40 years ago. (I have never done it but was standing right there when one of my high school mates did.)