Chief Delphi - Burnt Fuses

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Quote:

Originally Posted by Al Skierkiewicz (Post 926825)

OK,
The compressor from the KOP has a 25 amp start and 10-12 amp run current rating. The fuse in the Spike is guaranteed to blow. (OK I guarantee it will blow) Maybe not the first or second time but it will blow when you need it the most.
The breaker will only insert one way into the Spike so turn it around if it looks like it can't full insert. It is also possible to insert the breaker (or fuse) at an angle and miss the terminals altogether.
Please remember that off board compressors are required to have a Spike powering the compressor under Crio control. The compressor can be off board but the Spike and pressure switch must be on board.

wrong, the pressure switch may be off board, but only if the pressure in the tanks is 60 PSI

<R75> ...
The compressor may be mounted on the ROBOT, or it may be left off the ROBOT and used to pre-charge compressed air in the storage tanks prior to bringing the ROBOT onto the FIELD. Off-board compressors must be controlled and powered by the ROBOT.
Followed by this note...
The only difference between an on- and off-board compressor is that the off-board compressor is physically removed from the ROBOT. The intent of this rule is to permit teams to take advantage of the weight savings associated with keeping the compressor off-board. However, using the compressor off-board of the ROBOT does NOT permit non-compliance with any other applicable rules.

The pressure switch, Spike relay, etc. remain on the robot and all parts of the remaining pneumatic rules apply.

Quote:

Originally Posted by Al Skierkiewicz (Post 929595)

<R75> ...
The pressure switch, Spike relay, etc. remain on the robot and all parts of the remaining pneumatic rules apply.

Al, the main regulator may be left off the robot when using an off-board compressor with 60PSI tanks per R76-D.

Quote:

<R76> “Working” air pressure on the ROBOT must be no greater than 60psi. All working air must be provided through one primary Norgren adjustable pressure regulator.
...
D. If the compressor is not included on the ROBOT (under the provisions of Rule <R75>), the regulator may be located on-board or off-board, provided all other pneumatic rules are satisfied. Note that if the regulator is kept off-board the ROBOT with the compressor, then only low-pressure (60psi or less) “working” air can be stored on the ROBOT.

The pressure switch must be connected to the high pressure side of the system per R78. As the high pressure side of the system is not on the robot, it would seem that the pressure switch not only can be held off the robot, but must be if the main regulator is also held off the robot.

Quote:

<R78> The Nason pressure switch must be connected to the high-pressure side of the pneumatic circuit (i.e. prior to the pressure regulator) to sense the “stored” pressure of the circuit. The two wires from the pressure switch must be connected directly to a digital input and ground port on the Digital Sidecar, and the cRIO-FRC must be programmed to sense the state of the switch and operate the relay module that powers the compressor to prevent over-pressuring the system.

Kevin,
Sorry, I missed the reference to the 60psi at the end of the post. Trying to make a ham radio contact with Milan and writing at the same time. Although you can loose a little weight with this configuration, storing at 60 psi is risky business. I expect to see some teams using this approach early in the season, I do expect it be dropped later though. I don't expect to see a lot of teams at 120 lbs. so the weight savings is not that critical.