Re: 2000 line encoder for lathe threading... Where to find????

> Anyone in the group have or know where one could purchase an

encoder for a

> small Sherline lathe for threading feedback? Specs need to be:
> Incremental 2000 line, +5 supply voltage, a duel quadrature plus

index

> w/complements output, ttl buffer (7406) open collector output type,

100khz

> data, 40khz index frequency responce.
>
>
>
> Russ

Russ,

I can't really help directly with your enquiry, but I think that a
2000 line encoder is massive overkill and would probably cause a
problem with software. I have a small Denford CNC lathe and it is
fitted with a 50 slot encoder as original, but I don't have screw
cutting setup yet.

The only commonly available software that has a threading capability
to my knowledge is TurboCNC and at the moment uses 1 impulse per rev.
When I heard this I assumed it would be result in poor quality
threads, but from what I've read it seems to work just fine,
due to the momentum of the rotating parts, I think.

Take a look at www.dakeng.com if you haven't already, to find out
about TurboCNC.

Cheers, Martin.