Re: [CAD_CAM_EDM_DRO] Re: Bridgeport Series I verse Series II CNC Refit Candidates

----- Original Message -----
From: "caedave" <caedave@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, November 05, 2005 3:57 AM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Bridgeport Series I verse Series II CNC
Refit Candidates


> Adding another one here I think!! It's been a while so I'm not
> sure of the series.
>
> Table was about 40" x 12" with 5 Tslots, "X" travel about 36",
> "Y" about 30" and "Z" 6".
>
> Bridgeport Works retro fit, used Anilam Crusader Control
> which was a fully closed loop control, very good when it
> worked but we blow a lot of Y axis driver cards (7 in 2 years)
> which Bridgeport's engineers only resolved by replacing
> the whole controller unit.
>
> DC tooth belt drives with shaft encoders for speed and
> linier encoders for position on the X and Y, direct shaft
> drive on the Z using linier encoder for position and software
> positional feedback for speed.
>
> The knee was left manual and with no power assist and
> manual lever lock.
>
> X and Y manual handles refitted after the shafts and nuts
> where changed. It was therefore possible to use the
> machine as a manual machine by utilising the knee for
> Z moves.
>
> Last job it did before being sold on was re-machining
> a BR Black 5 Steam Loco's expansion links for the
> Seven Valley Railway
> (one of the other lecturers was a volunteer driver for the SVR)
>
> ----- Original Message -----
> From: "Les Newell" <lesnewell@...>
> Subject: Re: [CAD_CAM_EDM_DRO] Re: Bridgeport Series I verse Series II CNC
> Refit Candidates
>
>
>> Those are the manual machines (apart from the EZ trak which was a beast
>> on it's own). The CNCs are very different. The Series 1 CNC is based on
>> the manual machines with a special rigid ram, often using 30 series
>> quick change tooling. Drive is via a varispeed belt from a 3 phase motor.
>> The Series 2 CNC is an altogether bigger beast and AFAIK there isn't a
>> manual equivalent. They usually take ISO 40 tooling with a pneumatic
>> drawbar. If I remember correctly drive is toothed belt from a DC motor.
>>
>> Les
>
>
>
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