• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

magnetic orientation for speed pick up

rajobigguy

rajobigguy

Administrator
Staff member
I'm replaceing the magnet in my front rotor, you know the one for the speed pick up, and before I epoxy it in I though it might be a good idea to ask if anyone knows wheather there should be a particular N/S orientation or does the pick up just nedd to see a disruption in the earths magnetic field to to do it's job?
 
Depends on whether you're in the northern or southern hemisphere. Damn Husky speedos don't work on the equator.
 
rajobigguy;25293 said:
I'm replaceing the magnet in my front rotor, you know the one for the speed pick up, and before I epoxy it in I though it might be a good idea to ask if anyone knows wheather there should be a particular N/S orientation or does the pick up just nedd to see a disruption in the earths magnetic field to to do it's job?
Click to expand...

Not sure of the north / south question but why are you going to epoxy it in? Mine is held in place by a snap ring and only goes in one way. Are you using a "generic" magnet?
 
I added a magnet and trail tech speedo to a bike that didn't have a speed to begin with. The magnet was on the end of a bolt and simply replaced a rotor bolt. Just screwed in till it was snug and then torqued. I don't think you need to worry about anything other than it being able to pass the pick up sensor.
 
I think you are suppose to set the clearance between magnet and sensor a 5 thousand. (About the width of a penny.)
 
RumRunner;25319 said:
Not sure of the north / south question but why are you going to epoxy it in? Mine is held in place by a snap ring and only goes in one way. Are you using a "generic" magnet?
Click to expand...

Yes as a matter of fact I am using a generic magnet because the factory one is on backorder right now. This is for a SM coversion for my TE and while I acquired all the big parts pretty easily I did have to improvise some of the hardware.
It's interesting that you're magnet is held on by a snap ring because the one in my TE is just epoxyed in, I just assumed that they all were.
 
HuskyDude;25326 said:
I think you are suppose to set the clearance between magnet and sensor a 5 thousand. (About the width of a penny.)
Click to expand...

Yes usually you need to set the proximity to a certain distance but in my case the magnet that I'm putting in there is a rare earth neodydium iron unit and if it gets within a 1/2 " of a sensor it will trigger it, " if it's worth doing, it's worth doing to excess".:D
 
HuskyDude;25326 said:
I think you are suppose to set the clearance between magnet and sensor a 5 thousand. (About the width of a penny.)
Click to expand...

I think you mean 5 hundredths. 5 thousandths would be super close!

The poles don't matter, the pickup is a reed that is closed (making contact) when the magnet is near it regardless of north or south pole.
 
lairpost;25334 said:
I think you mean 5 hundredths. 5 thousandths would be super close!

The poles don't matter, the pickup is a reed that is closed (making contact) when the magnet is near it regardless of north or south pole.
Click to expand...

Ah ha, a defineitive answer .
Thank you very much, I suspected that was the case but I would rather have a second opinion than trying to dig out the epoxy.:cheers:
 
lairpost;25334 said:
The poles don't matter, the pickup is a reed that is closed (making contact) when the magnet is near it regardless of north or south pole.
Click to expand...

I'll go with this :thumbsup:

I'm a little late, sorry.
 
lairpost;25334 said:
The poles don't matter, the pickup is a reed that is closed (making contact) when the magnet is near it regardless of north or south pole.
Click to expand...

Only way it could matter (North or South) is, if the (Reed Pickup)
was Polarized (opposite poles attract and like poles repel each other) and not just made of metal.

I think that's right:oldman:
 
HuskyDude;25374 said:
Only way it could matter (North or South) is, if the (Reed Pickup)
was Polarized (opposite poles attract and like poles repel each other) and not just made of metal.

I think that's right:oldman:
Click to expand...

Good point, it's an easy test, move the magnet past the pickup in both polar orientation(s) with the computer on and see if it registers MPH.

Coffee, thanks for this forum, it's a fine place to exchange ideas and discuss different points of view!
 
As it turns out, Rum Runner was right about the magnet being held in with a snap ring. The part that I was looking at that was epoxied in was a small aluminum carrier for the magnet, the carrier had a snap ring on the back side. Anyway SM conversion is complete, thanks for all the help. When I get some pics I'll post them in the original SM conversion thread that I started.http://www.cafehusky.com/forums/showthread.php?t=2262:cheers:
 
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