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View Full Version : Using two Large PAPST Fans?

SuperDave
13-02-2003, 21:09
may a robot use two large PAPST Fans on this year's robot? We would like to use them to cool the robot. We have one from this year's kit and last year's kit. Also, do the fans hook directly up to the circuit breaker? Thanks

Dave R - President (team Leader) Team 987
Las Vegas, NV
Highest Rookie Seed Award (5th seed) - Einstein Division, 2002 Championship
Jeff Waegelin
14-02-2003, 08:54
I believe FIRST anwsered this recently. You can use any number of fans for cooling purposes.
Al Skierkiewicz
14-02-2003, 10:50
Super Dave,
Everywhere in the docs where fans are referenced the singular form "fan" is used for the EBM and the multiple "fans" is used for the smaller fans. Although I can find no other reference, I would go with just one fan. Besides the weight is pretty high on that larger fan.
SuperDave
14-02-2003, 19:18
Originally posted by Al Skierkiewicz
Super Dave,
Everywhere in the docs where fans are referenced the singular form "fan" is used for the EBM and the multiple "fans" is used for the smaller fans. Although I can find no other reference, I would go with just one fan. Besides the weight is pretty high on that larger fan.


what is EBM? thanks
-Dave
Al Skierkiewicz
17-02-2003, 07:10
EBM is the new manufacturer name after merger with Papst. EBM is a german company from Mulfingen, GMBH. Their US headquarters are in Farmington, Connecticut.
rust710
17-02-2003, 07:52
Originally posted by SuperDave
Also, do the fans hook directly up to the circuit breaker?

All Fans hook directly to a 20 amp circuit breaker. The same breaker can be used for all fans. I even put the speed controllers fans on the separate fan breaker. My thought is that if you pop the 40 amp breaker on the motor you should probably still cool the speed controller and you are saving .5 amps that can be sent to the motor.:D
Al Skierkiewicz
17-02-2003, 07:58
Originally posted by rust710
All Fans hook directly to a 20 amp circuit breaker. The same breaker can be used for all fans. I even put the speed controllers fans on the separate fan breaker. My thought is that if you pop the 40 amp breaker on the motor you should probably still cool the speed controller and you are saving .5 amps that can be sent to the motor.:D
Not a bad idea! Add a little weight in wire for stable, independent cooling. Cool!
Josh Hambright
17-02-2003, 09:40
I am assuming you just always have the fans running but isn't there a rule somewhere that states that you have to hook the fans on the speed controllers upto the inputs of the victor or something like that?
Something about it always being on if there is power going to the unit.
f22flyboy
17-02-2003, 09:46
Apparently FIRST has changed its mind again, and now says no

http://jive.ilearning.com/thread.jsp?forum=3&thread=1882&tstart=15&trange=15
rust710
17-02-2003, 15:11
Originally posted by f22flyboy
Apparently FIRST has changed its mind again, and now says no

http://jive.ilearning.com/thread.jsp?forum=3&thread=1882&tstart=15&trange=15

Your link is bad, but taking the &trange=15 of the end fixes it.