recalibrate encoder yes or no??
long time no see, since you only see me when I've got trouble nowadays :)
And trouble it is.
Last week, something snapped in my daily-use-vectrix, something in the gearbox i think, because I hear the motor revving, but not much happens.
I figured, being lucky to have a second V for spare parts, I just swap the whole back uh.. thing with the motor and the wheel..
I did so, but something is not right. I have almost no power and I hear strange noises coming from down there.
The piece was working previously, so I didn't quite expect it.
So I'm looking for a quick answer:
would it make sense that the encoder should be recalibrated after swapping the whole thing?
thx in advance guys!
Can you have a look inside and let us know what went wrong in there?
That would be most interesting, because I have never heard of that failure mode before.
Sounds like the sun gear has fallen off (can it?) or the motor shaft snapped - all rather unlikely, but who knows.
Maybe the cogs on the sun gear stripped?
Forgot to mention:
**I THINK IT'S A GOOD IDEA IF VECTRIX TOOK NOTICE OF THIS!**
True, but I'd rather hear from the engineer types on V what they think of it.
A few questions:
Was there any warning of this, something that could have indicated that the bolts were loose?
Were they possibly over-tightened (without a torque wrench) at some stage?
What was this gearbox like for the 10000km? Was it a quiet one or a noisy one, with even or uneven whine?
Could this be material fatigue due to vibration/whine?
Would it be worth the effort to pull the assembly apart and replace the bolts with top quality ones on other VX-1's? Like replacing the fuse before it blows in traffic?
Normally a bolt with that sort of importance would have been locktighted into place. However i have seen this sort of thing happen in all sorts of places before.
Reasons can be (but certainly not a complete list)
1. Wrong grade bolts used (if at somepoint its been replaced my someone or in the factory they grabbed the right length but wrong grade bolt ?)
2. Over/undertorquing when fitting leading to work hardening in over time
3. Bad batch of bolts from factory
Thanks to you, i will now check and/or replace my bolts for the strongest i can find in that size when i replace the oil on my boxes.
I didnt catch what sort of mileage. However along with oil changes a few mechanics in my shop would recommend probably checking it all yearly just for kicks.
Hell the gearbox only takes about 10 mins to get apart after the bike is lifted.
Wow! I will add checking/replacing the bolts to my gearbox list. Mine has been noisy and I plan on inspecting and modding for gear lube filling.
Glad you didn't have a wreck when that came apart.
Depending on hardness of the bolts you could center drill them and use an e-z out to remove the broken bolts.
Wow, that is one nasty failure!
I would let the importer know and also write to Vectrix.
This should be investigated properly before you start drilling holes and spoil the 'evidence' and could be reason for a recall.
Good thing you have bought that spare bike, visionary thing to do as it turns out...
As you are in Belgium. Are there a lot of cobblestones on your routine rides? Maybe this in combination with high tire pressure could have put extra stress on those bolts...
How far had you travelled before the failure occurred? I'd agree that this is most likely due to over-torquing the bolts, be it at the factory when it was built or during some sort of later re-build when it is more possible that someone did them up a bit too enthusiastically. My V gets rattled up and down the most bumpy dirt/pot-hole ridden road every day and I'm at 27,000 miles (43.500km) now and am confident that your unfortunate experience shouldn't happen to everyone who owns a VX-1! Thank goodness it didn't lob you off!
I would be interested to hear whet Vectrix say, if they get back to you.
Best wishes, Drew
I've never been afraid by vectrix failures, but this problem is pretty dangerous!