| is it a a kind of block stop optional thing, where say on a TS-type
| you can get the fence to roll into position and hold there until,
| either the sheets are pushed through by hand? or mechanically, and
| then you run a
| little bit (more) of the program at the next position, repeat,
| through "blocks" of the program?
The whole setup is whatever seems appropriate for the job. Generally,
I fixture as much as I can on the table (manually) and then turn the
machine loose. Fixturing is wildly variable depending on the workpiece
size and material - and might be vacuum or mechanical (anything from
drill press vise to cam clamps to shop-made screw clamps to
double-sided carpet tape or even bolting workpieces down).
Automatic tool changers and loading devices are more expensive than
I've been able to spend for.
| In metal, everything is done: lights, secutity system, shipping,
| receiving, transport, speed, coolant, tool change, tool wear
| checks, SPC quality
| control (intermittent check of parts), rough & finish, auto clamping
| fixturing and part loading, pallette change and rotate, you know.
Yuppers - I'm aware of (if not expert with) a lot of this; but most of
it requires way more resources than I can bring to bear. It'll have to
wait until I have a dollar to spend on the winning lottery ticket.
Meanwhile I just clunk along with my Armstrong loader/unloader/tool
DeSoto, Iowa USA
I may be mistaken about the need for for much more than on the fly parts in
a lot of places, given the potential. $100G quickly makes sense if only to
turn all day to a differnet Dia. from std. stock. It s the real big dollar
industry setups, where a $mil is what that job running through there is,
where they have AGVs that retrieve anything/everything up to including 30'
long 3' Dia. bars off revolving computer controlled stock racks, and load
steel pieces than are dozens of cubic feet on m/cs, that are impressive, and
can do everything.
- posted on January 8, 2007, 1:41 am
| I may be mistaken about the need for for much more than on the fly
| parts in
| a lot of places, given the potential. $100G quickly makes sense if
| only to
| turn all day to a differnet Dia. from std. stock. It s the real
| big dollar industry setups, where a $mil is what that job running
| through there is,
| where they have AGVs that retrieve anything/everything up to
| including 30'
| long 3' Dia. bars off revolving computer controlled stock racks,
| and load
| steel pieces than are dozens of cubic feet on m/cs, that are
| impressive, and
| can do everything.
True - and one of the interesting things that has happened is that the
once prohibitively expensive motion control components have steadily
decreased in price, which has made the basic technology available to a
great many more people.
The little Compucarver is probably a good example. I'm inclined to
believe that it should have been designed to be attached to a
computer; and I think that it could have been offered with an order of
magnitude higher precision - and it certainly should support g-code --
but it still boggles my mind that it's available at a local dry goods
Some people will buy 'em - and they'll complain that the precision
sucks and that the software capabilities are inadequate for serious
work (and they'll be right) - but either the Compucarve folks will get
their act together or else someone else will get it right. It'll
probably happen within 3-5 years; and there'll be a whole new slew of
jokes about the old 'Compucarp' machines.
I'm still mulling over buying one of the little HF mini-mills and
replacing the hand wheels with micro-steppers. Looks like the total
parts cost (including the mill) should be under 1K. Would you have
guessed - ten years ago - that you could have a new CNC mill (of any
size) for under a thousand? Amazing.
DeSoto, Iowa USA