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Unread 06-02-2012, 21:39
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VEX Robotics Engineer
AKA: Arthur Dutra IV; NERD #18
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: Mar 2005
Rookie Year: 2002
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Re: Blowing spike fuses

Quote:
Originally Posted by rsegrest View Post
Ok here is the setup:
All motors are RS-550 motors

256:1 Banebot on a conveyor system -> VexSpike -> PDBoard (20AMP fuse)
64:1 Banebot on a loader wheel -> VexSpike (@ 2.5 in compression on ball) -> PDBoard (20AMP fuse)
4:1 Banebot on launcher wheel -> Jag -> PDBoard (20AMP fuse)

Wires have been double checked. We have blown three fuses in the spike connected to the 64:1 loader wheel (it lasts for several test runs and then blows and yet never develops enough consistency to pinpoint any one thing).

We have toyed with wiring, code, and fuses (both the standard 20AMP yellow fuses and the reset fuses in the PDboard) and just can't seem to locate our issue. Ideas would be appreciated regarding what we might be missing.
The answer is simple: your motors are drawing more than the 20amp fuse in the Spike can handle.

Try moving these motors over to Victor or Jaguar speed controllers on 30amp circuit breakers.
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Art Dutra IV
Robotics Engineer, VEX Robotics, Inc., a subsidiary of Innovation First International (IFI)
Robowranglers Team 148 | GUS Robotics Team 228 (Alumni) | Rho Beta Epsilon (Alumni) | @arthurdutra

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