Re: [CAD_CAM_EDM_DRO] Re: Denford Orac retrofit

The orac's where originally self contained but with an RS232 interface
and a data tape transfer unit along with (intended for tutorial tapes) a
surprisingly good tape sound system (Music while you work).

Off-line programming being done by Denford software running on
BBC Computers. This software was contained in a plug-in cartridge
that required the original BBC 1. computers to be modified. The BBC II
had this cartridge slot as standard.

Once the G-Code had been compiled it could be transferred via the
RS 232 interface or via a data tape.

Licom's AlphaCAM CADCAM software (Turn Module) still has the orac
Post Processor as one of it's many standard machine posts.

Dave M.

----- Original Message -----
From: "Blue" <jo001k1132@...>
Subject: Re: [CAD_CAM_EDM_DRO] Re: Denford Orac retrofit


> Hi David,
>
> If your machine is the same as mine, I've got a Harrison 280 CNC, then the
> computer is not a BBC but came from the mother company Acorn with a
> re-written bios and an operating system on EPROM written for the
> particular
> machine. Mine is still going with the only trouble coming from an expired
> stepper driver, which I repaired. Every now and again the whole thing
> throws
> up weird faults and this is usually tracked down to dirty connections
> between some of the many boards. I'm sure the day will come, halfway
> through
> that job that had to be finished yesterday, when I'll have to convert it
> to
> PC.
>
> Regards,
>
> Terry



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