Re: Chinese Whispers - Was Angle Iron Ways

You can't please some people :)

I'm not convinced by your figures (10Am^-2 seems very small) but I'm
not going to argue (can't be bothered to try myself). Certainly it is
possible to ECM fast and with good finish but perhaps it isn't a job
for an old welder and the kitchen sink.

All I can suggest is that you take the other element of my idea, that
of passing the unfettled angle through some guides with the machining
widget of whatever type it might be set at carefully defined distances
from said guides. Push in angle and out pops your ways, short
machine, long ways.

The widget? Grinding is good but you need to be able to true up the
wheels or you could just get close and put fresh ones in, I like the
idea of having two grinders at 90 degrees to each other. Actually if
you use cut off wheels then you can have more than one bite at the
apple. Make a cut and the wheel starts to get worn on its end but
more importantly the sides, so just move the whole thing so that the
side you are dealing with is at a lower diameter. This also means
that you get a bit of a lead in, the worn part takes off some of the
material before the fresh part comes in to play.

So I guess you are talking a pair of cheap grinders, some cut-off
wheels and some welded metal bits with parts you can slide a bit.

I can make a sketch if you really want.

What else, electric planer :O

Graham