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Unread 29-07-2014, 11:49
Tristan Lall's Avatar
Tristan Lall Tristan Lall is offline
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Re: Pneumatic Restrictions & Improvments

Although I acknowledge that FIRST can and probably should define constraints to level the playing field, it would be preferable that those constraints be defined in ways that make that intent obvious, while simultaneously being easy to understand and enforce.

That usually implies employing a straightforward restriction in place of a convoluted one. If FIRST really intends that the choice of compressor be used as a proxy for a limit on pneumatic performance (because the set of known legal compressors has a certain range of airflow, electrical and thermal characteristics), they should say so via an official channel. They should also endeavour to show that the restriction produces parity—with all the uncertainty in application of the rule, particularly off the field, this is hardly the case right know.

Or even better, if their objective is only to limit the on-field performance of the robot, rather than curtail off-field maintainability, they should write a specification that is permissive off the field, and restrictive on the field—like orifice size and pressure limits within the robot,1 rather than worrying where the air comes from.

Incidentally, apart from (arguably) being an arbitrary part of the challenge, is there a legitimate reason to limit the ability of a team to recharge from any safe air source (provided sufficient controls on pressure and flow are present on the robot)? FIRST should permit teams to recharge their pneumatic reservoirs from any regulated (e.g. to 120 lb/in2), gauged, room-temperature air or inert gas sources that are safe and legal to carry into and operate within the venue.

1 Cv is not an adequate way to specify this.
 


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