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-   -   WARNING: check polarity (http://www.chiefdelphi.com/forums/showthread.php?t=111165)

racesick222 13-01-2013 17:36
WARNING: check polarity
 
Check polarity on main Anderson leads.

Saberbot 13-01-2013 17:41
Re: WARNING: check polarity
 
Was this from the kit of parts?

jbsmithtx 13-01-2013 18:24
Re: WARNING: check polarity
 
Uh oh... Such a simple problem can lead to devastating results.....

racesick222 13-01-2013 18:40
Re: WARNING: check polarity
 
Quote:
Originally Posted by Saberbot (Post 1214492)
Was this from the kit of parts?
Yes.
We had it wired into our power distribution board, but found out and nothing got damaged.

Ether 13-01-2013 19:21
Re: WARNING: check polarity
 
Quote:
Originally Posted by racesick222 (Post 1214487)

Check polarity on main Anderson leads.


Quote:
Originally Posted by Saberbot (Post 1214492)

Was this from the kit of parts?

Quote:
Originally Posted by racesick222 (Post 1214518)
Yes.
Is there a way to make sure this warning gets out to all the teams?

ebarker 13-01-2013 19:23
Re: WARNING: check polarity
 
Notify FIRST asap. There is a team blast coming out in a couple of days.

Ether 13-01-2013 19:27
Re: WARNING: check polarity
 
Quote:
Originally Posted by ebarker (Post 1214540)
Notify FIRST asap.
How does one "notify FIRST".

Is there a process in place for this?

jtdowney 13-01-2013 19:35
Re: WARNING: check polarity
 
Quote:
Originally Posted by Ether (Post 1214543)
How does one "notify FIRST".

Is there a process in place for this?
Email frcteams@usfirst.org per the contact page on the FIRST website.

ebarker 13-01-2013 19:43
Re: WARNING: check polarity
 
FIRST has been notified and are aware of this discovery.....

All done.

team222badbrad 13-01-2013 19:50
Re: WARNING: check polarity
 
We had this all wired up to our Power Distribution Board. Once we plugged this in we heard lots of clicking and quickly unplugged the battery. Luckily our PDB, two Talons, and my RC equipment went undamaged.

Since we only had minimal electronics installed we were quickly able to diagnose the issue and continue testing our drivetrain. :yikes:

Magic Smoke averted...

MentorPrice 13-01-2013 20:01
Re: WARNING: check polarity
 
Wow I got to check ours now then haha

Bill_B 13-01-2013 23:50
Re: WARNING: check polarity
 
Everyone should check their KoP components. This should be relatively easy to fix when discovered. Switching the contacts in this connector is pretty simple. I'll make pictures about it upon request. We put one on the new battery and I'm chagrined to realize I didn't check it - - - - yet. The battery beak worked though, so maybe we skated on this one.

Saberbot 14-01-2013 00:00
Re: WARNING: check polarity
 
Quote:
Originally Posted by Bill_B (Post 1214777)
Everyone should check their KoP components. This should be relatively easy to fix when discovered. Switching the contacts in this connector is pretty simple. I'll make pictures about it upon request. We put one on the new battery and I'm chagrined to realize I didn't check it - - - - yet. The battery beak worked though, so maybe we skated on this one.
From what I remember, the KOP battery cables have an extra crimp in the plastic that makes it more difficult to remove the contacts. I'm afraid that FIRST night have to send out replacements.

Al Skierkiewicz 14-01-2013 08:28
Re: WARNING: check polarity
 
First KOP engineers are being notified now.

Toa Circuit 14-01-2013 11:56
Re: WARNING: check polarity
 
Are we going to get replacements of these, or is there a way to swap out and modify the plugs?

Mark McLeod 14-01-2013 12:01
Re: WARNING: check polarity
 
1 Attachment(s)
Quote:
Originally Posted by Toa Circuit (Post 1214908)
Are we going to get replacements of these, or is there a way to swap out and modify the plugs?
The cables can be reversed pretty easily.
The connector attached to the wire slides over a flat spring in the housing to latch securely. You just need to depress the spring from the front of the housing and lightly pull out the cable. Reinsert just by pushing it back into the housing.
Avoid scratching the top of the connector, so the contact surface isn't degraded any.

You can see the flat springs in the cutaway below and the little lip at the tip of the connector that fits over the end of the flat spring to hold it securely in place.

Toa Circuit 15-01-2013 23:10
Re: WARNING: check polarity
 
Quote:
Originally Posted by Mark McLeod (Post 1214913)
The cables can be reversed pretty easily.
The connector attached to the wire slides over a flat spring in the housing to latch securely. You just need to depress the spring from the front of the housing and lightly pull out the cable. Reinsert just by pushing it back into the housing.
Avoid scratching the top of the connector, so the contact surface isn't degraded any.

You can see the flat springs in the cutaway below and the little lip at the tip of the connector that fits over the end of the flat spring to hold it securely in place.
Alright, sweet. Actually, we didnt need to though- the plugs we got were of the proper polarity.

Al Skierkiewicz 16-01-2013 08:18
Re: WARNING: check polarity
 
Just to check, have a lot of teams found these or is this a rare event at this point? None of ours were incorrect.

CalTran 16-01-2013 08:31
Re: WARNING: check polarity
 
Quote:
Originally Posted by Al Skierkiewicz (Post 1216403)
Just to check, have a lot of teams found these or is this a rare event at this point? None of ours were incorrect.
Ours were correct.

FrankJ 16-01-2013 08:37
Re: WARNING: check polarity
 
Ours were correct as well.

A good lesson learned is always check these kinds a things, even when they come from a reputable vendor.

MrForbes 16-01-2013 08:37
Re: WARNING: check polarity
 
It's probably a rare event, but still worthy of significant attention (I saw two emails and a CD post and was reminded again last night by a teacher who saw an email about it).

Ours were assembled correctly.

Phyrxes 16-01-2013 08:41
Re: WARNING: check polarity
 
All of the ones received by both 2068 and 4472 were correctly assembled.

JohnBoucher 16-01-2013 08:41
Re: WARNING: check polarity
 
Our's were OK

flameout 16-01-2013 11:58
Re: WARNING: check polarity
 
957's were assembled correctly.

Thank you to FIRST for the quick notification.

cgmv123 16-01-2013 17:26
Re: WARNING: check polarity
 
Our's were correct as well.

Joe Ross 17-01-2013 14:02
Re: WARNING: check polarity
 
330's were assembled correctly.

MagiChau 17-01-2013 14:05
Re: WARNING: check polarity
 
85’s are correct.

msaunders 17-01-2013 14:07
Re: WARNING: check polarity
 
862's were correct.

team222badbrad 17-01-2013 14:16
Re: WARNING: check polarity
 
It appears that this must have been a rare instance and that we got the first off the line on Monday morning or last off the line Friday Afternoon connector.

Luckily no harm was done. (That we know of yet...) Just lots of clicking from the 40 amp fuses. :-)

Allison 17-01-2013 14:32
Re: WARNING: check polarity
 
One of the three we received was assembled backwards.

Thank you for bringing it to everyone's attention.

Allison


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