Mini Mill Control Board

Hi to all.

I have managed to destroy the "Whats this " Please don't ask how.

But would like to know if this can be bought and where from

Thankyou

Its an xmt 2135 speed controller made by Sieg.

Arceurotrade sell them for around £85-£90....

What is the issue with yours?

I've sent you a pm, check your messages....

Edited By John Rudd on 14/12/2016 17:49:04

John,

It's probably irrelevant by now, but 'What's this' is identifying the small torroid positioned between the big resistor and the heatsinks.

MichaelG.

Hi John,
You beat me to suggesting Arc Euro. To save Vic some time this is a link to the board.

Edit.  Well spotted Michael. I had not seen it and I don't think John did either. (I thought Vic was talking about the complete board.  The item is the trigger transformer that drives the gates on the SCRs. There are not many turns on it so it could be rewound if the core is not broken.

Les.

Edited By Les Jones 1 on 14/12/2016 17:59:52

VC

When you say that you have destroyed the "Whats this" do you mean the small transformer where you have placed the title or do you mean that you are looking to replace the entire board. It is possible to repair these boards for a very small outlay depending on whats damaged. If it was a simple overload/being worked too hard for too long then it might only be something like the SCRs or diodes that have failed.

Where abouts are you, roughly, as there are several people on this forum that have the knowledge to repair a board like this and may be prepared to take it on, trouble is Christmas is coming up which could put a spanner in the works. The other alternative is to contact the supplier to see if they hold stock of this board. I suspect companies like Warco, Chester, Amadeal and possibly Arceurotrade would have boards would be suitable but they are usually fairly costly items.

MW

Looks like everybody got their reply in before me 

Edited By Martin W on 14/12/2016 17:58:26

2:1 ... perhaps I was mistaken

Ok, I missed the annotation on the photo......its the trigger transformer for the two thyristors that form part of the bridge network....removing it from the pcb is nigh on impossible as the holes for it are plated thru types....only way is to destroy it and remove each pin one at a time.....

Oh, and I missed Les's description too......

I best not try and go to any parties this Xmas....I may be too late   

Edited By John Rudd on 14/12/2016 18:05:43

... but you do know the answer, John

Maybe a silly question, but could the leads be cut off to a tail, and a new component spliced onto them.?

A double-sided foam pad would probably support the weight.

MichaelG.

I daresay that if the toroidal core can be saved, it may be possible to rewind it and solder the wire ends to the pins.....

But one has to ask, what has happened to lead to its demise?

What other unrevealed failures are there?

Thanks to all for the replies.

Yes a new board would sort my problem.

Rather an expensive way. So can this toroidal be bought and where from.

To reply to Mr Rudd no other unrevealed failures

Just an idiot with a 12 mm drill in the lathe trying to make a hole in the new plastic box

SNATCH end of the little beastie

Google "ferrite ring transformer core" lots about, a few quid.

You will need lacquered copper wire of the same diameter and to wind on the same number of turns.

Someone might have a burnt out board they can take one off for you.

Neil

VC,

If you do swap out the transformer, dont use a solder sucker to clear the holes......use desoldering braid with some decent flux....else you may end up delaminating the copper print from the board. Use only suficient heat to melt the solder....too much and risk damaging the board....I use a temperature controlled soldering station...

Hi Vic,
Before you remove what is left of the transformer make a note of which way the windings are wound on the toroid so you can get the phasing of the two windings correct. So note the direction (clockwise or anticlockwise) that the wire is wound round the toroid. This must be done for both windings. Also try to count the number of turns on each winding. (If there is enough of it left.) If you can measure the dimensions of the core and post that information one of us may have a core of about the same size. We would just have to hope the permeability is about the same.

Les.

The controller board appears to be the same as used in a Seig X-axis power feed.

Recently discussed at **LINK**

Paul.

I've been looking at some pictures I took of my X3 board. The transformer has 15 turns on the primary and also on the secondary. I estimate that the core is about 12mm dia. (By comparing it with the size of the TO220 SCR package..I have some cores removed from CFL lamps that may work. (They are about 10mm dia.) I have seen some toroidal inductors in the past used on mains input filters on switch mode power supplies that might work. I have also found this pulse transformer on ebay that would probably work provided a way could be found to mount it.

Les.

Edited By Les Jones 1 on 14/12/2016 22:45:34

This ebay item number 311617340418 is actually advertised as working with the mini lathe.>>

I hope this helps it really got me out of a hole, when I found I could use these.>>

Richard>>

That's useful to know, Richard ... Thanks

MichaelG.

Hi to all

Once again in need of help on Mini Mill control board.

Nothing broken this time. Not being very good at electrics. Made note of where all the wires connected from switch. motor, mains and EMI filter.to the control board.

Then managed to lose the note.

Have spent hours looking up a wiring diagram that I could understand but just managed to get older.

HELP any body out there willing to put me out of my misery

Thanks