Re: [CAD_CAM_EDM_DRO] Re: Taig CNC mill - Bridgeport

Alan Marconett KM6VV wrote:

> Joe,
>
> A series I or II has servo motors on it? Then that's probably NOT what
> I saw. :>(

Series-I and Series-II refer to the size of the machine base. Bridgeport
used the same basic castings for both manual and CNC machines.
Bridgeport's own line of CNC machines were the BOSS series, but
there were a number of other makers who bought Bridgeport's machines
in both manual and CNC configuration, and retrofitted their own
controls to them. Bridgeport's most notable mod for CNC was the
huge ballscrew that surrounded the quill, giving coaxial thrust to the
quill, rather than linking a smaller ballscrew offset from the spindle
axis. I think the Crusader controls were retrofitted to standard
manual machine bases. These were definitely servo driven machines.

Bridgeport's own BOSS line started out with stepper drives, and the
BOSS-3 through BOSS-5 (I think) were steppers. The BOSS-6
and BOSS-7 were servos, and then the line was replaced with the
EZ-Trak, which is also servo driven.

All of these models were available on either Series-I or Series-II
sized bases.

Jon