Re: [CAD_CAM_EDM_DRO] Bridgeport Tracer?

Do not laugh Smoke but modern servo valves
have to fight to get close to the accuracy of tracer valves.
On my lathe I found out that the difference between moving up and
moving down is 2 to 3 micrometers. So together with the tracer lever
it will be in my case a third of it in accuracy.
So old stuff must not be bad but it must be checked out if it is suitable for the
task to fulfil.
The trouble is in set up time and the oil heating up so that the parameters change.
I am stuck to my copy lathe because not any lathe operator in 10 years was able to set it up.
Good Luck
Sven Peter

Smoke wrote:

> Never having used a hydraulic tracer mill, I'd have no idea how accurate
> they are. I DO KNOW however, that you can build a mechanical tracer
> attachment to fit on a standard Bridgeport (or any oother mill) that is
> extremely aaccurate. We've used them to make highly accurate sight bases
> and other components to mount on the compound curve section of rifle
> barrels.
>
> The device is spring loaded in the down position. It could be operated
> manually or by a standard power feed unit.
> It does not add to the noise factor. Total weight of the unit is only a few
> pounds as the major componetnts are made from aluminum. Cost....EXTREMELY
> CHEAP to build...and you can machine all your own parts right on the machine
> your building it for.
>
> Smoke
>
> > How accurate are hydraulic mills like this? The guy says it's the most
> accurate tracer they've ever run but they've replaced it for CNC machines.
> > How noisey are the controllers if they run a compressor of sorts?
> >Approximately, very approximately, hiw much would a mill like this weigh?
> A few thousand lb's, tens of thousands or simply concrete destroying lb's?
> The table would be about stomach height from the pictures so I think it
> might just go in the garage! `.^)
> >
> >6.)
> > How much would one of these beauties be new? >
> >John (UK)
>
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