Re: [CAD_CAM_EDM_DRO] Series 1 Bridegport CNC manuals?

Les Newell wrote:

>Thanks to all who replied to my query.
>
>Sorry to be so vague but I couldn't find much info on it. The control
>panel says 'Bridgeport Textron" and that is about all I can find. The
>machine is about 25 years old and has a paper tape reader on the side.
>It has stepper motor drives with large finned motors.
>
>

OK, that helps. It sounds like it might be a BOSS-3 through BOSS-5,
but probably a 3 or 4.

>I had a good look inside and it looks like it could be expensive to
>repair. One of the secondaries of the big 3-phase transformer that
>supplies the drives is open circuit and the transformer looks cooked. I
>could get the transformer rewound but I don't know what cooked it..
>

No, it doesn't make sense. It is possible a supply line malfunction
caused the
damage, in which case, everything is likely fried. I don't think anything
downstream would be able to fry that transformer unless some idiot put
copper pipe where the fuses went. If you don't have 3-phase power, it
doesn't make any sense at all to repair the transformer. Rip it ALL out,
except for maybe a couple of contactors.

> I
>happen to have some Geckos and a 65VDC power supply so I think it will
>be easier to scrap the current control and replace it with a computer
>running Mach2. I hooked up the X axis motor to a Gecko and got a max
>rapid rate of about 3m/min (about 120IPM) with very high acceleration.
>Probably a safe max rapid rate will be in the region of 2m/min which is
>plenty fast enough for me.
>
>

Yes, it should be. That is quite impressive, certainly better than most
BOSS
machines do with the original control.

Jon