Model Railway Forum banner
Cancel

re-magnetizer

7271 Views 6 Replies 5 Participants Last post by  TonyDaly, 
V
I have an old re-magnetizer that I last used 30 years ago, which you just flash across a 12volt car battery, which works very well with the old XO3/4 motors, but I cannot remember how I did it as to weather it was important about the poles which way round they should be when flashed across the battery etc
See less See more
Reply
Save
Like
1 - 7 of 7 Posts
John Webb
The only problem that is created by remagnetizing the wrong way round is that the motor then runs in reverse for a given application of polarity. This is easy to cope with on an X04 - just swap the brush connections round so the insulated brush becomes connected to the chassis and the uninsulated one becomes the insulated.

If you do a search on the Forum using the search facility for 'magnets' you'll find several topics regarding remagnetisation and new magnets with new materials which may be of interest to you.

Welcome to the Forum, by the way. I hope you'll enjoy it.

Regards,
John Webb
Reply
Save
Like
D
QUOTE (John Webb @ 25 Feb 2008, 13:13) <{POST_SNAPBACK}>This is easy to cope with on an X04 - just swap the brush connections round so the insulated brush becomes connected to the chassis and the uninsulated one becomes the insulated.

Regards,
John Webb

Or just upend the magnet on X04 and other similar designs of motor. I have had locos with 'professionally' reconditioned motors fitted which have this problem - its an easy mistake especially with the Triang design - but easy to correct.

Regards

David Y
Reply
Save
Like
T
I am noticing very interesting topics throughout the forum and this is another one on the subject of magnets.

I am running some old Triang locos, including the Princess and tank engines.... all over 40 years old and appear to work OK but what exactly are the visible signs of magnet decay. I would think that if one motor can suffer this then surely all would deteriorate.

Could Velomac350 tell me please what the re magnetiser looks like and how it is used

Tiebar
Reply
Save
Like
V
6
QUOTE (tiebar @ 18 Mar 2008, 10:55) <{POST_SNAPBACK}>I am noticing very interesting topics throughout the forum and this is another one on the subject of magnets.

I am running some old Triang locos, including the Princess and tank engines.... all over 40 years old and appear to work OK but what exactly are the visible signs of magnet decay. I would think that if one motor can suffer this then surely all would deteriorate.

Could Velomac350 tell me please what the re magnetiser looks like and how it is used

Tiebar

I think the only way to test the magnetisem is to rub a screwdriver on the magnet see how much it pulls there is proberly a more technical way testing but I do not know how
but certainly after it has been remagnetised you can feel the differance, :
as regards the remagnetiser I could send you a couple of photos of mine, if you can send an email address, As I am not sure how to post photos on this site
but if you are a member of yahoo DCCUK forum I could post the there easily, I was 30 years ago when I made it , and as far as I can remember it was about a 100 turns of
1.2mm insulated copper wire, not sure what SWG that is
wound on to a 19mm square iornbar cut into 3 to form a U shape, two groves cut on the inside of the U so the screw a nut holding the magnet of a XO4/3 motor slide in between so you dont have to take the motor apart to remagnetise it , the 100 turns of insulated wire is wound on to the bottom of thr U leaving about 2x250mm tails, that you bare the ends so it can be flashed across 12 volt car battery
and it must only be a quick flash as that is all it needs
to remagnetise
See less See more
Reply
Save
Like
T
6
QUOTE (velomac350 @ 19 Mar 2008, 13:10) <{POST_SNAPBACK}>I think the only way to test the magnetisem is to rub a screwdriver on the magnet see how much it pulls there is proberly a more technical way testing but I do not know how
but certainly after it has been remagnetised you can feel the differance, :
as regards the remagnetiser I could send you a couple of photos of mine, if you can send an email address, As I am not sure how to post photos on this site
but if you are a member of yahoo DCCUK forum I could post the there easily, I was 30 years ago when I made it , and as far as I can remember it was about a 100 turns of
1.2mm insulated copper wire, not sure what SWG that is
wound on to a 19mm square iornbar cut into 3 to form a U shape, two groves cut on the inside of the U so the screw a nut holding the magnet of a XO4/3 motor slide in between so you dont have to take the motor apart to remagnetise it , the 100 turns of insulated wire is wound on to the bottom of thr U leaving about 2x250mm tails, that you bare the ends so it can be flashed across 12 volt car battery
and it must only be a quick flash as that is all it needs
to remagnetise

Hi Velomac350,
Many thanks, have sent PM to you so hope it turns up OK

Tiebar
See less See more
Reply
Save
Like
TonyDaly
6
QUOTE (velomac350 @ 19 Mar 2008, 13:10) <{POST_SNAPBACK}>I think the only way to test the magnetisem is to rub a screwdriver on the magnet see how much it pulls there is proberly a more technical way testing but I do not know how
but certainly after it has been remagnetised you can feel the differance, :
as regards the remagnetiser I could send you a couple of photos of mine, if you can send an email address, As I am not sure how to post photos on this site
but if you are a member of yahoo DCCUK forum I could post the there easily, I was 30 years ago when I made it , and as far as I can remember it was about a 100 turns of
1.2mm insulated copper wire, not sure what SWG that is
wound on to a 19mm square iornbar cut into 3 to form a U shape, two groves cut on the inside of the U so the screw a nut holding the magnet of a XO4/3 motor slide in between so you dont have to take the motor apart to remagnetise it , the 100 turns of insulated wire is wound on to the bottom of thr U leaving about 2x250mm tails, that you bare the ends so it can be flashed across 12 volt car battery
and it must only be a quick flash as that is all it needs
to remagnetise

Hello.
Could you post a link to the photo of the de-magnetizer please.
See less See more
Reply
Save
Like
1 - 7 of 7 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Model Railway Forum
A forum community dedicated to Model train and railway owners and enthusiasts. Come join the discussion about collections, displays, models, styles, scales, motors, reviews, accessories, classifieds, and more!
Full Forum Listing
Explore Our Forums
OO Gauge & 4mm Scale DCC On My Layout The Station Concourse Tracks, Layouts & Scenery
Top