On 10/11/2009 08:11 PM, Steve Blackmore wrote:
> Been there, had an 8inch dia 4 jaw come off on me and dance around the
> shop, the Lexan window, behind where I was stood is still cracked ;)
> Easy enough to drill and tap a hole, fit a set screw, job sorted.
>
> Thankfully my current lathe has 3 studs with a camlock. The smallest
> chuck I have is 6 inch diameter and it's 3 inches deep. I can stop that
> in two turns from 3200 rpm without a brake, but why? I have yet to come
> across a practical reason to do that, apart from a bragging contest.
>
> The only possible theoretical reason is tapping, the drag off the tap,
> and the slowish speed means it stops pretty well instantly anyway. I
> must be doing it right, over the years I must have tapped many tens on
> thousands of blind and through holes and have yet to break a tap.
>
> These days I also "cheat" slightly and mainly use a Tapmatic SM4
> extending nose tap holder, makes life so simple :)
>
> Steve Blackmore
> --
>
>
Steve, the mini lathe is my test mule. Once I'm done, I will either
CNC my 12x36, and buy a bigger one, or build a slant bed. Also, I have
one of my mill-drills torn down, that I will be CNCing. I want the
capability to do rigid tapping with tool changes, so spindle braking is
a valid option.
Right now, I'm just learning how to get everything working. I worked
with ladder logic many many years ago, but this HAL thing is giving me
headaches.
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