Hello – Help Needed with Bridgeport Wiring

[Scott HeadingtonParticipant @scottheadington22530]

Hi Guys,

Thank you for letting me join the forum as a new member. I have recently bought a Bridgeport Milling machine, J head, variable pulley model. On inspection the previous owner/ or owner before that had cut all the wires going to the control box by the knee. I have managed to trace wires back to the main control box via continuity testing. The fault I am having at the moment is when I turn on the machine then turn on the toggle switch ( far left) on the control box, the contactors come on, then when I press the green button the contactor disengages. I know this is wrong because it should be the reverse of what I just said. I have tried all different combinations with wires going to different places on the control box but I just seem to be coming up against a brick wall with this. Has anyone out there got a wiring diagram of the control box so I can get it up and running please??

[Scott HeadingtonParticipant @scottheadington22530]

Bridge port Milling machine

[OldironParticipant @oldiron]

Have you tried looking on Vintage Machinery.org They have a vast collection of manuals on most machines including Bridgeport. The manuals are all free to download although I think you can make a donation if you wish.

regards

[BazyleParticipant @bazyle]

Nice to see you Scott,
Perhaps this thread can be renamed "Bridgeport woring help needed" to get more attention from BP owners.

[Chris Evans 6Participant @chrisevans6]

I do have a manual for my Bridgeport. What year is your machine ? ( the serial number contains the date code)

Lots of wiring changes over the years.

[Scott HeadingtonParticipant @scottheadington22530]

Hi Chris,

The serial no on my Bridgeport is 358130481W.

Does this tell you what model it is and year of manufacture?

[OldironParticipant @oldiron]

You need the actual machine number from the knee casting then look up at at lathes.co.uk or globalmachinebrokers.com The number on the head will not work.

regards

[noel shelleyParticipant @noelshelley55608]

Welcome ! I have a wiring diagram that may be right, it is a poor copy. The control circuits seem to be from a 415v to 110v transformer. It sound as though the push button is n/c rather than n/o and operating it drops the contactors. send me a pm and I will try to help. Noel

[David George 1Participant @davidgeorge1]

Hi Scott I have a copy of the handbook in PDF format which has a wiring diagram at the end I will send a message with my email so you can send me an email with handbook attached.

David

[Scott HeadingtonParticipant @scottheadington22530]

David, ok that would be great as I'm at my wits end with it. I just want to get it up and running. Cheers

[David George 1Participant @davidgeorge1]

Scott have a look at the top of this page there us a little mail symbol inbox just click it to receive messages when logged in.

David

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