one of my three is out of sync

SpokePOV kit for bikes

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andyb
 
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Joined: Wed Jul 29, 2009 5:27 pm

one of my three is out of sync

Post by andyb »

Hi
I have fitted three spokepovs to my front wheel all spaced evenly and all the same distance from the rim.
I loaded the same image to all four banks of all three spokepovs with the same offset
But when it spins one of the three is out of sync with the other two the image is off by about 10 degrees
when i turn that spokepov off the image made by the remaining two is all in the same place.
where should i look to find the fault ?

andyb
 
Posts: 7
Joined: Wed Jul 29, 2009 5:27 pm

Re: one of my three is out of sync

Post by andyb »

I tried taking the microcontroller out and swapping it for one of the others
the problem moved with it, which suggests a problem with the controller ?

adafruit
 
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Re: one of my three is out of sync

Post by adafruit »

indeed! is one of the pins bent?

andyb
 
Posts: 7
Joined: Wed Jul 29, 2009 5:27 pm

Re: one of my three is out of sync

Post by andyb »

All the pins appear fine and located fully in the socket.
But the image is still sequencing out of sync with the other two.
It works in isolation but in a different place on the wheel to the others, which is odd.

adafruit
 
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Joined: Thu Apr 06, 2006 4:21 pm

Re: one of my three is out of sync

Post by adafruit »

if you turn the other two off (to make life less confusing)
does the image stabilize or is it flakey?

andyb
 
Posts: 7
Joined: Wed Jul 29, 2009 5:27 pm

Re: one of my three is out of sync

Post by andyb »

If i turn the other two off the "faulty" one is stable but is about a quarter turn off,
as if the rotation offset is < or > the 220 that all three are set at.

adafruit
 
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Re: one of my three is out of sync

Post by adafruit »

and you're super-sure that the rotation offset is correct?

andyb
 
Posts: 7
Joined: Wed Jul 29, 2009 5:27 pm

Re: one of my three is out of sync

Post by andyb »

DOH !

I feel like such a fool.

I changed the first one to 220 but the others were still at the default of 255.
All working fine now, Thanks for your help. Loving your work.

Results here ; http://www.youtube.com/watch?v=bzByoaj9-hI

adafruit
 
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Re: one of my three is out of sync

Post by adafruit »

neat, Muybridge would be proud :D

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