1949 10ee Trouble Shooting? (WiaD tube drive)

You're going to want the contactor wiring to look like this below:



The start/stop is wired to the hold points on the contactor. Start supplies power to the contactor coil, closing the hold point so the contactor stay closed until there's power loss or the stop button is pressed. There are other switches involved (cabinet front and maybe the spindle lock) and overloads but that's the gist of it. You want to find these switches and confirm that they close appropriately and that the Field Failure Relay contacts are good.

Since all that seems to be disconnected on yours either the coil in the contactor is bad (likely) or the wiring from the contactor to the switches got broken (possible, less likely). You need to look for disconnected wires, and to trace those wires from the contactor housing to the switch box. If you can't find them you'll want to add them.

Russ,

What drawing is that from? I have drawing 20122 (dated June 5, 1956). It came from the CD you sent me years ago. It has a slightly different version of the contactor wiring, without the control transformer, work light or air-tracer. I think it goes with wiring diagram 20123 (6-8-1956).

Cal Haines said:

Russ,

What drawing is that from? I have drawing 20122 (dated June 5, 1956). It came from the CD you sent me years ago. It has a slightly different version of the contactor wiring, without the control transformer, work light or air-tracer. I think it goes with wiring diagram 20123 (6-8-1956).

Click to expand...

Looks to be from drawing 20202, July 1956. 20123 might be a decent start for him unless he's got ELSR.

rke[pler said:

Looks to be from drawing 20202, July 1956

Click to expand...

OK. That was on your CD as well. I think that's the version for the air-tracer model with ELSR and a JIC cabinet.

Another thing to be aware of with this contactor is that the main terminals are in a different order than the original contactor:

The replacement (show above) has terminals (left to right) aux, L1, L2, and L3. L1 and L3 are the two phases that route through the overload heaters.

The original contactor had the terminals in a different order (left to right) L3, L1, L2, and aux. L1 and L2, which provide power to the drive electronics, need to go through the overload heaters.

The aux terminal is used to maintain the coil circuit after the (momentary) start button is pressed and is wired in series with the overload relay, stop button and the control contacts, including the timer, field loss circuit and spindle lock switch. On a WiaD machine the aux input and load terminals are connected to wires F1 and 73A, respectively.

Assuming that the replacement contactor is used, it's terminals should be relabeled (left to right), aux, L1, L3 and L2, so that the overloads will be on the correct phases, and connected accordingly.