[TheForge] Power hammer Vs air hammer

[Demon Buddha]

John Husvar wrote:

> How about just making the input air and exhaust air go through proportional
> valving?

	OK, then my only question about that is whether the ram will stop at 
the position corresponding to the depression of the treadle.  So  if I 
depress 1/2 way the ram goes half way and stops at that position.  If I 
go slowly to 1/2 position, the ram goes there gently.  If I go fast, so 
does the ram, but it still stops at the right spot.  If that is the 
case, then this would seem to be the solution I have been looking for.

	Thanks for the idea.

	-Andy
> 
> This could be done using a foot pedal valve that controlled both sides
> equally. Wide open would allow free exhaust and input, partial would allow
> the exhaust air to resist the movement of the ram. Since the input air
> pressure is higher than the exhaust pressure it could overcome it and drive
> the ram down, but slowly or fast as you wished.
> 
> IIRC that's how the huge air hammer I lost 10 bucks on at Corey Forge in
> Corey, PA, worked. The operator controlled both the input and exhaust air
> from the podium. Hammer was at least 15 feet tall and had a freakin' HUGE
> hammer block. With changeable dies.
> 
> I took a bet against the operator being able to control the thing well
> enough to drop the hammer on an egg and not break the egg. He did it.
> 
> He'd won quite a few after-work 12-packs that way and he won another one
> from me. 
> 
> That could control hammer position by closing the exhaust valve stopping its
> fall.  With the ram thus stopped, you could restart it from wherever. That
> operator could, which improved his control -- and his financial condition.:)
> 
> 
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