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