Treadmill motor not working

[keeney123]

Re: Treadmill motor not working

i'v never seen a motor with a fuse inside.
if it did, it would just play dead,

All the fans motors and shop vacs I have taken apart have a thermal fuse in line with the motor windings. If the motor overheats because the fan is not cleaned or if air intake of shop vacs is plug and overheats these little thermal fuses blow and the people throw the appliance away. Could save a lot of waste if they put in a resettable fuse.

[stj]

Re: Treadmill motor not working

seriously?
bastards.
in europe our vac's use self-resetting thermal cutouts.
if you overheat it, you just unplug it for 10 min's to cool down.

[JonathanAnon]

Re: Treadmill motor not working

Hi guys, just to update on this one.. I pulled apart the motor.. clean down the brush contacts and the commutator... cleared a bit of dust and dirt from inside the chassis.... Put the motor back together and it started spinning again. tbh, I didnt think I had done anything significant to make any difference, but it's working fine now when I leave it on test with a 12V battery.

However when I plug it back in to the treadmill, it now starts and then immediately stops... If I take off the drive belt, it will stay running.. So I'm thinking that there is too much tension on the belt.. Just looking up YouTube to find out how to clean the mechanics of the treadmill.

[selldoor]

Re: Treadmill motor not working

When it is running see what voltage is being supplied to it.


Your further on than I am - still not tried anything with mine.

[JonathanAnon]

Re: Treadmill motor not working

Your further on than I am - still not tried anything with mine.

Yeah, I managed to get the thing in to my shed so that I could work on it... It's a big unit, very awkward to move...

When it is running see what voltage is being supplied to it.

I was more thinking about maybe borrowing an induction ammeter / current clamp... I'm still thinking that the it's meeting too much resistance, then consequently the motor pulling too much current, then switching off.. The belt is difficult to turn, but not having much experience with treadmills, I'm not sure how tight it should be....

Currently downloading every video I can find on youtube about belts, rollers etc etc..

[newtothis]

Re: Treadmill motor not working

Was the sparking internal?

Generally if there is sparking the brushes have chipped... This can cause the burning smell from the friction and of course stops the motor from working properly, they will run without tension but stop with tension. Check the brush contact surface to see if its smooth and chip free

[xelectech]

Re: Treadmill motor not working

[QUOTE=JonathanAnon;556982]"Yeah, I managed to get the thing in to my shed so that I could work on it... It's a big unit, very awkward to move...



I was more thinking about maybe borrowing an induction ammeter / current clamp... I'm still thinking that the it's meeting too much resistance, then consequently the motor pulling too much current, then switching off.. The belt is difficult to turn, but not having much experience with treadmills, I'm not sure how tight it should be.... "

Paraphrasing a manual for a Proform treadmill, 'at the center of the deck the belt should pull away from the deck about 3-4 inches on either side'.

Also, check to make sure that there's nothing sticky either on the underside of the belt, or anywhere along the belt's path, in case someone tried using the wrong kind of lube or something.

HTH

[JonathanAnon]

Re: Treadmill motor not working

here's a link to a video of it running, or not running as the case may be... :-(

https://www.youtube.com/watch?v=Xy-vGa-ZNS8

Was the sparking internal? Generally if there is sparking the brushes have chipped...

The sparking was internal yeah, near where the brushes are... When I first took the motor out it would not move at all. It was only when I cleaned it internally and cleaned the brushes that it worked... When it started running again, I presume that it was fully sorted... You're saying that if the brush contacts arent good enough they wont be able to carry the full 7 amps?

[SteveNielsen]

Re: Treadmill motor not working

Did you lube the motor bearings when you cleaned it?

[newtothis]

Re: Treadmill motor not working

here's a link to a video of it running, or not running as the case may be... :-(

https://www.youtube.com/watch?v=Xy-vGa-ZNS8



The sparking was internal yeah, near where the brushes are... When I first took the motor out it would not move at all. It was only when I cleaned it internally and cleaned the brushes that it worked... When it started running again, I presume that it was fully sorted... You're saying that if the brush contacts arent good enough they wont be able to carry the full 7 amps?

Indeed if they do not have full contact the motor won't run correctly. Seen it with many many lawnmower and washing machine motors. They usually end up chipping because of something small getting into the motor or due to heat. Typical sign is that the motor runs but not with much power, They are usually stoppable by hand in most cases. Remove the brushes and check them

[JonathanAnon]

Re: Treadmill motor not working

Made some progress with this today..

Remember that the treadmill motor would run fine without the drive belt connected, but would shut down (as in the video above) when the belt was connected. With the drive belt connected, I decided to connect my 12V battery and see if it would move, and to my surprise it did.

So then I had a look at the little sensor on the side of the treadmill... Have a look for yourselves.. (note that I remove the sensor for the last part).

https://www.youtube.com/watch?v=d-JaSh6FDRY

[JonathanAnon]

Re: Treadmill motor not working

I disconnected the Reed Switch connector from the board and tested it while running the motor, first with my hand and then with a 12v battery...

https://www.youtube.com/watch?v=LElCpRFwbJQ

From my testing in the above video, the Reed Switch seems to be working.

But still, with the reed switch connected the motor shuts down, with the reed switch connected the motor continues to run. It's a bit confusing.

[SteveNielsen]

Re: Treadmill motor not working

The question comes to mind what exactly the reed switch switches. What circuit is it switching? The fault may lie within that.

[stj]

Re: Treadmill motor not working

it may be feedback for the speed control.

[JonathanAnon]

Re: Treadmill motor not working

Yeah, I've been thinking that when you rule out all other options....
1) The motor works fine with the sensor disconnected..
2) the belt moves fine so it's not a mechanical problem with that...
3) And the sensor is working..

The only time there is a problem is when that sensor switch turns ON... So the circuit that it is switching on must have a problem. I may pull out the controller board and check the feedback resistors. Cant find a schema unfortunately..

Tune in tomorrow for the next youtube episode.. :-) .. and many thanks

[xelectech]

Re: Treadmill motor not working

Jonathon, I'm on dialup so can't watch your videos, but I think that's the rpm sensor that your talking about - do you know if it's in the right position? Maybe it got knocked out of place. Please disregard if you've already got instructions on how to adjust it.

[JonathanAnon]

Re: Treadmill motor not working

Hi there Xelectec, I thought we were the last to get broadband here in Ireland!!

Attached is a pic of the sensor..

I pulled out the board this morning. Soldered a few cold lookings joints and checked a few components but it's like looking in to the abyss without a schema.. Gonna look for one now.. It's a JohnsonFitness JDYF07L.

[xelectech]

Re: Treadmill motor not working

I don't recognize the sensor, or see how adjustable it is; however, the portion of the pulley right below the belt's marking of '4306' looks like a place where a magnet could go (that round serrated-looking hole), so I'm guessing that the magnet fell off; could be wrong
though, wouldn't be the first time.

[JonathanAnon]

Re: Treadmill motor not working

I don't recognize the sensor, or see how adjustable it is;

I've adjusted it every which way but it shuts down as soon as the magnet rotates past the reed switch.

looks like a place where a magnet could go (that round serrated-looking hole),

That's what I thought at first as well... But there IS a magnet in the front roller as you can see from the attached image. I also thought that possibly there was meant to be a second magnet in that "round serrated looking hole", but I've looked up lots of videos and manuals and there should only be one magnet. The second image that I've attached is the stock image of a brand new front roller..

[newtothis]

Re: Treadmill motor not working

I don't recognize the sensor, or see how adjustable it is; however, the portion of the pulley right below the belt's marking of '4306' looks like a place where a magnet could go (that round serrated-looking hole), so I'm guessing that the magnet fell off; could be wrong
though, wouldn't be the first time.

Could be right