Jump to content

My Mten3 Broke and What I'm Doing About it


Recommended Posts

Bummer!  When I watched your video about applying the handlebar wrap, I was wondering how long before you would be removing it.  Sorry, didn't mean to jinx you.  :crying:  I hope you have that little wheel back online pronto.  If you feel so moved, a video of the reassembly would be really helpful.  Your "I wonder if I can put this thing back together" remark definitely resonated with me.  

  • Like 2
Link to comment
Share on other sites

36 minutes ago, radial said:

Bummer!  When I watched your video about applying the handlebar wrap, I was wondering how long before you would be removing it.  Sorry, didn't mean to jinx you.  :crying:  I hope you have that little wheel back online pronto.  If you feel so moved, a video of the reassembly would be really helpful.  Your "I wonder if I can put this thing back together" remark definitely resonated with me.  

Yeah, thanks :furious: ;)

If I get lost come reassembly time, I'm calling you (but maybe yours is still in pieces waiting for a tube?).

I will video the fix.

  • Like 2
Link to comment
Share on other sites

I bought grip tape because of @Marty Backe video because it's an excellent idea.

Even better, don't go through turn styles (?), wouldn't have thought that.

If I'm sitting on a low brick wall, then put my feet on the wheel and stand up and go, do you think the wheel which is straining against the brick wall can pop like @Marty Backe wheel? If so, how long would straining against a brick before the wheel popped?

 

Edited by LanghamP
  • Like 1
Link to comment
Share on other sites

31 minutes ago, LanghamP said:

I bought grip tape because of @Marty Backe video because it's an excellent idea.

Even better, don't go through turn styles (?), wouldn't have thought that.

If I'm sitting on a low brick wall, then put my feet on the wheel and stand up and go, do you think the wheel which is straining against the brick wall can pop like @Marty Backe wheel? If so, how long would straining against a brick before the wheel popped?

 

Since you're not using your MSuper, do you want to run through a few scenarios and see which one causes the board to pop :)

I think it's somewhat of a mystery as to what the conditions have to be. There's probably a bit of bad luck involved :(

  • Like 1
Link to comment
Share on other sites

2 hours ago, radial said:

Bummer!  When I watched your video about applying the handlebar wrap, I was wondering how long before you would be removing it.  Sorry, didn't mean to jinx you.  :crying:  I hope you have that little wheel back online pronto.  If you feel so moved, a video of the reassembly would be really helpful.  Your "I wonder if I can put this thing back together" remark definitely resonated with me.  

I wouldn't worry about @Marty Backe's reassembly skills,lately he seems to have gotten lots of practice.There was a time when he had a special knack of knowing when to sell a wheel right before a failure so the buyer  would have to deal with the problem.However,I sense his skills are waining in that area.:D

  • Like 2
  • Upvote 1
Link to comment
Share on other sites

19 minutes ago, The Fat Unicyclist said:

Not (really) trying to derail the thread but, "How many of your wheels haven't you broken?"

Just my ACM. I burned it up when doing a trial run for the group ride that I was going to host for you. Took it up a very steep and long hill. Remember now :)

@Jrkline "Wheel Whisperer" is just having some fun at my expense because two of the wheels that I sold later failed. A third wheel that I sold didn't exactly fail, but the tire burst.

  • Like 2
Link to comment
Share on other sites

48 minutes ago, KingSong69 said:

looks like the dc converter then has giving up then...

If a mosfet would have burned, you should see that.

Is that a known failure mode for my situation?

  • Like 1
Link to comment
Share on other sites

1 hour ago, Jrkline "Wheel Whisperer" said:

Bummer:( about your wheel but at least you got @Jason McNeil working for you so you'll be up and running shortly.He recently sent me a replacement board for the "World Famous ACM2040" and that along with the 2.5inch tire mod makes it "Cogswell Ready" and waiting for a "rematch".:D The thing I'm curious about, is that your Mten didn't seem like a typical mosfet failure case,such as non free wheelspin combined with power button beep without balance power,which makes me think it's perhaps a power input problem.Especially since you found no visual evidence of a mosfet burnout during your inspection.Did you ever check the voltage output from the batteries? I would hate to see you change to board only to find out that the problem is in the batteries.;)

No, I didn't check the battery voltage. I'll check it, but it seems unlikely that the battery module would failed right at that moment.

  • Like 2
Link to comment
Share on other sites

11 minutes ago, Marty Backe said:

just having some fun at my expense because two of the wheels that I sold later failed. A third wheel that I sold didn't exactly fail, but the tire burst.

Really? Some more infos about the failures?...

  • Like 1
Link to comment
Share on other sites

8 minutes ago, KingSong69 said:

Not especially for your situation...but especially for a Gotway ;-) Dc converter directly comes after mosfet failure (source: Zlymex reports)

The fact that your wheel was still moving, that there is no beep when trying to power on, it is not possible a mosfet has blown, wheel would be stuck. Imho it clearly directs to the dc converter....(afaik.... but dont nail me on this, the yellow brick on the board).

Whatever: New board needed...

Perhaps @zlymex can jump in

Seems reasonable, the DC Converter. Wonder why that fails instead of a MOSFET.

I assume that it's possible for a MOSFET to fail 'open' instead of 'shorted'. But maybe that's never been the case?

  • Like 2
Link to comment
Share on other sites

So sorry for your temporary loss Marty.

There have been quite a few similar failures in the past on the forums when wheels have stopped on high kerbs or up against walls. They definitely suffer if held still when trying to turn.

I've blown mosfets on 3 boards now, twice on my KS 14" and once on my Gotway mcm.

Two of them had quite dark overheating marks around the legs of one of the mosfets but the third one was only very slightly darkened and only visible when viewed through the phone magnifier.

Edited by Gimlet
  • Like 2
Link to comment
Share on other sites

Let's just say that Marty collected all known Gotway failure options, like with those collectible sticker magazines. Those old, unsufficient motor connectors; the oscillation problem during the few weeks it happened; the too thin wiring; and now a standard broken board from a current spike due to locking the tire (with the exception that not a mosfet, but some other part blew). So far, so unspectacular.

This just shows his engagement and sacrifices towards the EUC community:) or might be Karma for constantly mentioning the good California weather while other people stare at rain, wind and snow. Not sure what the prize is, now at completion of the "collection":P

--

I quite like how the mten3 is built, the solid battery casing is a nice surprise. Beeper is at the outside of the casing, not somewhere in the middle. No too short cables crammed into some corner. Etc. - seems neat!

But how the board is put on the heatsink - this implies they bend the mosfet legs of every single board during assembly!:shock2: Please tell me this isn't so with every other 2-layer-mosfet board on a heatsink plate!

  • Like 3
Link to comment
Share on other sites

7 hours ago, Gimlet said:

So sorry for your temporary loss Marty.

There have been quite a few similar failures in the past on the forums when wheels have stopped on high kerbs or up against walls. They definitely suffer if held still when trying to turn.

I've blown mosfets on 3 boards now, twice on my KS 14" and once on my Gotway mcm.

Two of them had quite dark overheating marks around the legs of one of the mosfets but the third one was only very slightly darkened and only visible when viewed through the phone magnifier.

 

30 minutes ago, dmethvin said:

I had my Firewheel blow a DC converter as well, you can see the photo here. it was actually pretty hard to see that burned trace near the S81B chip without a very strong light on it. 

Thanks guys. I'm going to take a magnifier and do a closer study of the board to see if I can find any evidence of small burn marks. Just for kicks.

  • Like 2
Link to comment
Share on other sites

2 hours ago, meepmeepmayer said:

Let's just say that Marty collected all known Gotway failure options, like with those collectible sticker magazines. Those old, unsufficient motor connectors; the oscillation problem during the few weeks it happened; the too thin wiring; and now a standard broken board from a current spike due to locking the tire (with the exception that not a mosfet, but some other part blew). So far, so unspectacular.

This just shows his engagement and sacrifices towards the EUC community:) or might be Karma for constantly mentioning the good California weather while other people stare at rain, wind and snow. Not sure what the prize is, now at completion of the "collection":P

--

I quite like how the mten3 is built, the solid battery casing is a nice surprise. Beeper is at the outside of the casing, not somewhere in the middle. No too short cables crammed into some corner. Etc. - seems neat!

But how the board is put on the heatsink - this implies they bend the mosfet legs of every single board during assembly!:shock2: Please tell me this isn't so with every other 2-layer-mosfet board on a heatsink plate!

:D

I do agree that in general the Mten3 is nicely constructed, including the battery module (which I thought was cool). I was only slightly complaining because it was somewhat of a puzzle to take apart but that's necessitated by the ultra small form factor.

I still hope for the day that they stop spreading that silicon stuff over everything.

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...