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Unread 24-02-2012, 08:46
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,798
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Re: Tips from a veteran Robot Inspector

Now that we have had a few days of rest after stop build...
I feel refreshed.
Next installment to Al's Annual Inspection Thread, electrical. There is so many things that have changed and so many that remain the same.

1. All parts of the electrical system must be visible for inspection and on field diagnostics. Inspectors will need to see wires leaving the PD, breakers, speed controllers and motors. They will check for proper connection of the 5 volt regulator that feed the wireless access point. Power connections to the Crio, analog module, solenoid module and Digital Side Car must also be checked.
2. All indicators on the electrical system must be visible. Inspectors will check the LEDs during the 'power on' test for faults. There are three LEDs on the PD and the DSC, LEDs on the Crio and radio and the RSL if not lit must be checked on the DSC.
3. Wire size, the rules provide for the wire to be sized to the breaker. If you are using a 40 amp breaker, the wire can be a minimum of #12 or metric equiv.
4. Motors are a real challenge for us this year. More motors than ever before with certain motors from previous years and ARA available motors are all legal on the 2012 robot. Inspectors need to be able to identify these motors. If you are using motors from an ARA local outlet, you will need to show the paperwork that these were obtained through the legal source.
5. Custom circuits need to be checked for wiring, to insure they are properly supplied power, do not control loads directly or affect power pathways.
6. Insulation is required for the Crio and camera to prevent the battery from being connected to robot frame. The robot frame must be isolated from power.
7. Wiring colors will be checked. Red/white/brown/black w/stripe for +24, +12, +5 VDC supply wires and black/blue for supply return wires. Sorry, no exceptions.
8. One and only one wire per WAGO terminal. For multiple sensors that can be powered by one output, you may use a terminal strip or suitable splice/junction that is insulated.
9. All battery terminals must be insulated and any electrical connections that are not protected from other robots should also be insulated. We want you to play.
10. Battery must be securely mounted. Wire ties do not count. Secure belting, clamps, structural designs that prevent the battery from falling out are all legal and desirable. If you battery comes out, you will be disabled. Protect your battery, it is the lifeblood of your robot. There will be many robots tip overs, hard hits, falls off the bridge, etc.
__________________
Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
________________________
Storming the Tower since 1996.

Last edited by Al Skierkiewicz : 24-02-2012 at 08:48.
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