1. Home
  2. ⚙ Model Engineering in the UK
  3. Bridgeport table feed motors

Bridgeport table feed motors

A mate of mine has asked me to take a look at a manual bridgeport mill (I don't know which model) because neither the X or Y feed motors seem to be working. I'm guessing that it is unlikely that both motors will have packed up and it is possibly a supply problem. Spindle motor runs and the DRO fires up Main machine is 3 phase but what to the variable speed feed motors run off?? DC perhaps in order to get the speed control.

I just need a few clues before I turn up and look a complete ar$e as he is bound to be hanging round me expecting the miracle solution in minutes!!

TIA

Bob

Reply to
Bob Minchin
Loading thread data ...

I think the motors are 110v dc and are controlled by a box inside the main power cabinet. I am sure others on the group will be able to elaborate on this, Bob

Reply to
Emimec

The only DC speed/direction control I know of is the Leonard-Ward system as used on old 40mm Ack-Ack guns. It's old hat nowadays, probably replaced by complex electronic devices, there you go!!dohh :-( Don

Reply to
Donwill

In article , Emimec writes

If you get really lucky, it's just a circuit breaker. There are a number[1] inside the Cabinet Of Doom. I always found that one had tripped and resetting all of them (just to be on safe side... :^)) restored full function on mine. Note that they didn't always *look* tripped, but a good solid prodding seemed to do the trick.

My kind of fault-finding. Un-scientific, easy, and can be accomplished with a hammer...

Good luck!

[1] "One, two, three, many..."
Reply to
Nigel Eaton

Thanks Nigel,

I has just been moved so that could have dislodged a breaker. I'll give everything a good wiggle. It would be nice to have X axis feed as he want me to do a job for him using the mill. A total of 5m run of putting a 45 degree chamfer 15mm deep on 20mm steel plate. Lots of winding by hand otherwise.

Bob

Reply to
Bob Minchin

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.