RE: [CAD_CAM_EDM_DRO] Hp 7475 Plotter Servo's

Hi Terry,

Thanks for the "notes". I sure don't remember any disks with mine (new, my
buddy at HP ordered it for me), but that was quite a while ago, 1985?

Not sure why it would need to reserve any space on a disk drive. A spool
program might stay resident (TSR), but that's about all that comes to mind.

Best regards,

Alan KM6VV

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Blue
> Sent: Thursday, September 29, 2005 7:02 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Hp 7475 Plotter Servo's
>
> Hi Alan,
>
> I may be completely wrong as this is from memory of some 15+ years ago. I
> bought my 7475 and it came with a 5 1/4" disk of software. I was using Win
> 3.1 at the time and for one reason or another couldn't get the thing going
> from this operating system. The shop I bought it from had gone out of
> business and so twelve months later took the 7475 to Rapid Computors, here
> in Liverpool. They charged me £50 ($75) to tell me they couldn't get it
> going and it must be broken.
>
> On talking to a friend it was suggested I use the software and read the
> instructions again and the thing worked. It seems the software sets up a
> "scratch disk" on the hard drive, it reserves an area of hard disk for its
> exclusive use, similar to what Windoz O/S does. This "scratch disk" is not
> necessary when using Win95 of later as they have drivers built in.
>
> I also seem to remember in the instructions there was a DOS routine that
> could be typed to test the connection, I used it when I made up a longer
> cable. I also remember there is something odd about the RS232 cable
> wiring.
>
> Regards,
>
> Terry
>
>
> | Hi Terry,
> |
> | "scratch disk software"? What would that be?
> |
> | The HP7470 and HP7475A plotters (and probably ALL of the serial HP
> plotters)
> | respond to simple ASCII command strings. It looks like this:
> |
> | .@1024;3: IN PS0 PA0,0 IW458,618 16639,10364 VS127 PR9607,9847 SP1 PD
> | PR0,-8680 PU 0,8680 PD 291,-102 PU -3765,-302 PD 0,-495 PU 3218,774 PD
> 0,-495
> | PU -3218,216 PD 3218,279 PU -3218,-774 PD 3218,279 PU -3157,155 PD 0,-
> 373
> |
> | To send a .plt file to the plotter in DOS, one only has to initialize
> the
> comm
> | port, and "copy" the file to the appropriate COM port.
> |
> | In windowz, you'll need a driver for the plotter. I believe HP7475 is
> one
> of
> | the defaults supplied in Windoz98.
> |
> | Alan KM6VV
> |