Coil Wanted for Viceroy TDS/280/S

[Alexander2]

COIL WANTED.I have Viceroy TDS/280/S (Used for hobby of model engineering)
Date of Manufacture NOV/1984 Serial Number 32014/18/109
Motor is 1 1/8HP .82Kw, 3 PHASE, with an external inverter to run it off single phase. The machine has been in fairly regular use by me over the last 15 years with no problems.
It stopped when in use last week and on checking I found that the Coil in the solenoid that controls the forward speed has failed. Solenoid holds when set manually. Reverse is fine.
Can anyone tell me where I can purchase a coil to fit (or the complete solenoid)?
Make is BENEDIKT & JAGER x018 ser No 042.
Thanks, Alex.

[Andy B]

Hi Alex,

I've only just found this post (don't look on here too often these days). Have you sourced a replacement yet?

I can't find any references on the web with 'x018'. But I do have some other contactors for Denford machines, and there may be one to suit.
Is it a standard DIN-rail fitting, or a flat back onto a mounting plate?
Can you post a photo? Or some dimensions?
What is the coil voltage?
I assume it is switching all 3 phases.

Andy

[Pete.]

The contactors are completely dismantle-able and the coils aren't potted so unless it's cooked the winding you should be able to find the break and solder it. I unwound a heap of turns off mine to make them work on 240v.

[Alexander2]

Have just got back this evening from few days holiday and found the two replies. Will get more information and photographs over the next few days. Thanks for replies.

[Andy B]

The contactors are completely dismantle-able and the coils aren't potted so unless it's cooked the winding you should be able to find the break and solder it. I unwound a heap of turns off mine to make them work on 240v.

Well, I went to see Alex's lathe today an it turns out that 2 contactor coils were open circuit (forward spindle & coolant).
One was easily fixed - the loose end was very obvious and easily soldered onto the terminal tag.

The other is proving rather harder to locate the break. Removed about 150 turns so far.
The tape was very hard to get off - cellulose thinners helped.

Pete - did you unwind completely and then rewind with thicker wire to run on 240V?
Any idea how many turns there are in total on a 440V coil?

Andy

[Pete.]

I didn't count how many turns came off but I know it was a lot. MEasuring across the windings I started out with 30.11mm and stopped un-winding at 25.54mm.

I see no reason why you could wind the whole lot off then re-wind with the same wire. If you have taken off that many turns and it's still open-circuit I guess it's probably broken right at the start of winding perhaps even on the first turn.

Details here:

viewtopic.php?f=14&t=1948

[Andy B]

Thanks for the link, Pete.
I'd forgotten that you'd posted those details.

The contactors on Alex's lathe are slightly different to yours - although they are still in two halves held together with a spring clip each side. They are Benedikt & Jager type K12.
His lathe has the electronic spindle brake - does yours?

Now back to looking for those broken ends again!

Andy

[Pete.]

No, I have no brake but I wish it did!

[Alexander2]

Many thanks to Andy B for all the effort put in to locate coils and install them. All this was way above my head.
Machine is now fully operational. Thanks again Andy. Alexander2. ( delay in posting this message was because of family bereavement)