Bridgeport power feed problem, need help.

[HSS]

A friend bought a bridgeport mill at auction yesterday and the X feed motor won't run. The control board has 2 burned resistors and I have no idea their value other than they look like 1/4 watt. Does anybody have a diagram or layout of this board? TIA

Patrick

 

[churchjw]

What kind of feed is it? Post pictures of the drive and board.


Jeff

 

[HSS]

This is the board, Jeff, I didn't get any info off the motor and it is still on the mill at friends shop. The blue resistor at the bottom center of the board under the grey wire coming from the pot is blown out at the bottom, and the one to the right of it pointing upward to the right of the white plug is also blown out. I cannot read any info off of those 2 pieces.

Patrick

 

[ScrapMetal]

I can't really make out the details (I've even got my "readers" on ) but are there colored bands on those "resistors"?

-Ron

 

[HSS]

No Ron, there are no bands on these or they burned off. All the others are banded but not these. I have read, that this is a common problem with this type of power feed. Oil leaks onto the board and causes problems. I did notice that a lot of the connections on the rapid switch, power switch, fuse holder, and the pot, are covered with silicone caulking. Apparently this is not the first issue with this power unit.

Patrick

 

[Tony Wells]

Make and model number might help locate a schematic.

 

[HSS]

Ok, I'm assuming, Tony, you are asking about make and model of the power feed motor, at least I hope. If not, let me know.

Patrick

 

[Tony Wells]

That's part of it, but I was wondering what the tags on the board said. Anything helpful there on numbers?

 

[HSS]

Tony, there is a serial number, 222842 and a SECO number D28651J, and assembly D286C5. Thats the only numbers I see on the board other than a repair sticker from Fleming electric in Little Rock. The phone number for Fleming is a good number and I am going to call them today. I don't know if they have the records from that far back or not.

 

[churchjw]

Are you sure they are resistors? They may also be chokes(coils) or more likely caps. They look to thick compared to the length for resistors. But that is just a guess. There are several guys much better than I at electronics on here so maybe one of them can tell from the circuitry what kind of component it is most likely to be. It looks like the 5 studs along the right side are thyristor (switches) and that the little blue things are used as part of the circuitry that turns them on and off. I can see a diode that looks to be connected to each of them probably to keep current from feeding back from the thyristor (switch). Which means they could be flame proof resistors as well. Not sure any of this helps but I would like to know from some of the guys here if I am even on the right planet with my line of though. :thinking:

Jeff