Re: [CAD_CAM_EDM_DRO] Re: Software for wire EDM control?

----- Original Message -----
From: "Zafar Salam" <info@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, July 30, 2003 4:07 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Software for wire EDM control?


> Hi everybody,
>
> I've been following this thread with great interest because I own a
chinese
> wire edm for the last eight years. The chinese machines mostly run on
> molybdenum wires of dia .15 to .20 mm. We normally tie a 200 m piece of
wire
> on it's drum which moves back and forth between two hardened v-section
> pulleys. This length of wire lasts about 24 hours after which it weekens
and
> breaks up. Typical cutting speeds are 25 mm per hour in a 25 mm thick
steel.

Oops. Correct that. It's 1 mm per minute for 25 mm thick steel.

> For thicker or thinner sections speeds vary proportionally. Speeds on
> Aluminium are the fastest and carbides cut the slowest. Surface finish
> improves a little with lower currents. The 0.18 mm wire, which is most
> widely used, can withstand a current upto 2.5 amperes in contineous
> operation.
>