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Unread 03-02-2017, 08:23
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JamesCH95 JamesCH95 is offline
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Re: Pre-filling stored air

Quote:
R44 The one (1) ROBOT battery, a single pair of Anderson Power Products (or APP) 2-pole SB type connectors, the one (1) main 120-amp (120A) circuit breaker (Cooper Bussman P/N: CB185-120), and the one (1) CTR Electronics Power Distribution Panel (PDP, P/N: am-2856, 217-4244, 14-806880) shall be connected with 6 AWG (7 SWG or 16 mm2) wire or larger, with no additional devices or modifications, as shown in Figure 8-8.
R44 specifies (among other things) that only one battery should be connected to the robot at any time. There is no rule that prohibits changing a battery after charging storage tanks.

Re-posting the stored energy rule:

Quote:
R43. Non-electrical sources of energy used by the ROBOT, (i.e., stored at the start of a MATCH), shall
come only from the following sources:
A. compressed air stored in the pneumatic system that has been charged in compliance
with R84 and R85,
B. a change in the altitude of the ROBOT center of gravity,
C. storage achieved by deformation of ROBOT parts,
D. closed-loop COTS pneumatic (gas) shocks, and
E. air-filled (pneumatic) wheels.
There is nothing that says all energy at the start of a match must come from one battery charge. The one battery rule is there so that teams don't try to connect two batteries to the same robot, which is fraught with potential disaster.

Comparing the language between the pertient rules makes the answer obvious in my opinion.

Quote:
R37. The only legal source of electrical energy for the ROBOT during the competition, the ROBOTbattery, must be a non-spillable sealed lead acid (SLA) battery with the following specifications:
If all electrical energy used by the robot comes from a legal battery (of which only one may be connected at a time per R44) you'll be fine. No reference to 'only one battery per match' or 'one and only one battery' or anything along those lines.

As compared to the compressor rules:

Quote:
R84. Compressed air on the ROBOT must be provided by one and only one compressor. Compressor specifications must not exceed nominal 1.10 cfm (~519 cm3/s) flow rate @ 12VDC.

R85. The compressor (permitted per R84) may be located off-board the ROBOT, however the compressor must still be controlled and powered by the ROBOT when used.
...one and only one compressor... powered by the robot. Use only one compressor, powered by the one battery that you're allowed to have on your robot at a time, and you're good. Change the battery after charging if you like, there is no rule against that. (If the compressor is mounted on-board it still must be powered and controlled by the robot.)

I will bet $1 that this is how FIRST intends the rules to be interpreted.
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Last edited by JamesCH95 : 03-02-2017 at 08:25.
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