Bridgeport Series 1 CNC

[Part2fix]

New Member could use some help.
I just picked up a Bridgeport Series 1 CNC from a local business. First I tried to find the age the # on my machine it is CNC 4279. Can anyone help?

Second problem is the voltage the on the receptacle plug says 440V 3PH .
On the inside cover and outside cover of the electrical panel door it says 220V on a label. On the main drive motor is a label for high and low voltage it is wired for 440V but I have rewired it foe 220V.
The X, Y and Z axis motors do not give an option they do not say what they wired at. They only show how it is wired and an option to switch two wires to reverse motor direction?

[jalessi]

The machine serial number is located on the knee casting. Standing in front of the machine, crank the Y axis handle to move the saddle to the rear of its travel. The sliding guards will move to the rear exposing the stamped number. Most serial numbers start with a "12/BR" which signifies a 12" Y axis travel, however, for earlier machines, pre 60's, the serial numbers start with "BR" which signifies a 9" travel. The numbers were started in the 1930's with #1 and today have passed the 300,000 mark. The 50,000 mark was passed in the 1960's and the 200,000 mark in the 1970's. The 1980's and 1990's have brought the numbers to the 300,000 mark. Along with the machine serial number each milling head is numbered. They are stamped on the main housing and also on a tag on the upper drive. These numbers are prefixed with the model of the head. The most common are "M", "J", "2J". The M model is a 1/2hp older head that was out of production sometime in the 1960's. The J head is a 1hp V-belt drive head that was the main work horse for many years. The 2J variable speed head was first introduced with a 1 1/2hp motor. This was later changed to a 2hp motor. The 2hp heads have a \2 at the end of the head serial number. The following is a breakdown of machine s/n's in relation to the dates manufactured.

1938 - 1950 1 - 11,378
1951 - 1960 11,379 - 46,938
1961 - 1970 46,939 - 131,778
1971 - 1980 131,779 - 206,297
1981 - 1990 206,298 - 257,888
1991 - 1995 257,889 - 267,636
1996 - 2000 267,637 - up

Hope this helps,

Jeff Alessi...

[machintek]

This is a CNC not a series 1 standard.

I never received a serial/year cnc list.
This I believe is a old stepping motor CNC.

George

[valmet58]

The steppers are driven from the electronics which is fed by the internal power supply..you d'ont have to mess with those..In your cabinet where
the main switch is there is a big 3 phase transformer.you can rewire it for a lower input voltage(220)..I did that on the machine that my friend bought..In that same cabinet on the lower right side is another transformer that converts
440v to 110.(that feeds the steppers power supply)It will have to be disconnected.you will have to add a relay
that energises when you put the main switch on..the contacts of that relay
will then have to supply the 110V.that the transformer (440v /110) was supplying.. hope this helps

[colin1544]

Hello you asked about the year of the machine it looks like it is a 1979 machine as my machine is a similar number and in the cabinet was a build date test label for the controls and power and it related to the same year, it will also probably have a BOSS 5 Control which was the version at about that year. Hope this helps best of luck with the machine Colin.