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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