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  #16   Spotlight this post!  
Unread 29-01-2014, 11:49
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Re: Half Sidecar PWM Ports Working

Try making some code that allows you to directly control each output (As a Jaguar... like jag[1].Set(joystick.GetAxis(1)) ). See if the problem is really hardware or just your code not doing what you think it does.
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Unread 29-01-2014, 14:14
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Re: Half Sidecar PWM Ports Working

Quote:
Originally Posted by Toa Circuit View Post
Try making some code that allows you to directly control each output (As a Jaguar... like jag[1].Set(joystick.GetAxis(1)) ). See if the problem is really hardware or just your code not doing what you think it does.
Yeah, we did this before we tried it with code for the mecanums, and it had the problems with the simple code.
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Unread 29-01-2014, 14:15
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Re: Half Sidecar PWM Ports Working

Quote:
Originally Posted by kevin.li.rit View Post
afclsn, Can you take a picture of your side car and electronics layout for us?

Thanks.
I will get one up shortly.
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Unread 29-01-2014, 14:16
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Re: Half Sidecar PWM Ports Working

Quote:
Originally Posted by afclsn View Post
We will definitely check this tomorrow, as this is a new assembly of the electronics and it very well could be the issue, I just didn't think to check it.
Just checked, all three power lights are green.
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Unread 29-01-2014, 18:12
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Re: Half Sidecar PWM Ports Working

Quote:
Originally Posted by afclsn View Post
I will get one up shortly.
Here is our layout, without the motors connected.
We connect the black motor wire to the M- port, and the red motor wire to the M+ port.
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Unread 29-01-2014, 18:22
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Re: Half Sidecar PWM Ports Working

Quote:
Originally Posted by afclsn View Post
Here is our layout, without the motors connected.
We connect the black motor wire to the M- port, and the red motor wire to the M+ port.
I think you forgot the attachment. Correction it doesn't look like those pictures are public.
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Last edited by kevin.li.rit : 29-01-2014 at 18:47.
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Unread 29-01-2014, 21:36
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Re: Half Sidecar PWM Ports Working

Quote:
Originally Posted by kevin.li.rit View Post
I think you forgot the attachment. Correction it doesn't look like those pictures are public.
I noticed this when I posted it, but due to the securities on our school network, I couldn't easily fix them. Here they are now.


I case the photos don't work
http://imgur.com/5nqNRqG
http://imgur.com/1Ta5JIg

Last edited by afclsn : 29-01-2014 at 21:37. Reason: Photos
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Unread 29-01-2014, 21:43
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Re: Half Sidecar PWM Ports Working

I noticed you are using the ribbon cable. Could you have a backwards ribbon cable? I know those were floating around and its also easy to make backwards if you not careful. I am not sure of the symptoms of a backwards we have never had one backwards, but I know other teams have. Does anyone know if this could be the symptom they are seeing?
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Unread 29-01-2014, 21:59
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Re: Half Sidecar PWM Ports Working

Quote:
Originally Posted by arizonafoxx View Post
I noticed you are using the ribbon cable. Could you have a backwards ribbon cable? I know those were floating around and its also easy to make backwards if you not careful. I am not sure of the symptoms of a backwards we have never had one backwards, but I know other teams have. Does anyone know if this could be the symptom they are seeing?
This was the pre fabricated ribom cable from the kit, plus we tried it with another pre fabricated cable (an actual cable, not a ribon cable), so I don't think this is the problem, but all these cables were new this year so it is a possibility. I will check it tomorrow with the ribon cable we used last year and know works.
Thanks.
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Unread 03-02-2014, 13:10
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Re: Half Sidecar PWM Ports Working

So thanks for all the suggestion. Last Friday the sidecar started working again, and it was set up exactly as it was Wednesday and Thursday. This is good because the sidecar now works, but is also bad, because we don't know what went wrong. If you any other ideas as to what went wrong pleas let us know so that in the case it happens again we and other teams have a reference to go off of.

Thank you,
Team 4474
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Unread 03-02-2014, 14:19
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Re: Half Sidecar PWM Ports Working

Bet the multipin connector was not fully seated at one or both ends.
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Unread 03-02-2014, 14:46
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Re: Half Sidecar PWM Ports Working

I was going to mention that driving your mecanums for a half hour might be just about the limit for a battery to handle. I know it is tempting to keep the testing going, but you really have to watch the power level during testing and driver training runs.
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Unread 03-02-2014, 14:52
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Re: Half Sidecar PWM Ports Working

Quote:
Originally Posted by Al Skierkiewicz View Post
Bet the multipin connector was not fully seated at one or both ends.
Use some 4-40's to hold the ribbon cable into the sidecar and digital module. We've had this happen in the past to us.
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