Difference between revisions of "DEWBOT X Hatboro-Horsham Shooter Failure"
MaiKangWei (talk | contribs) |
MaiKangWei (talk | contribs) (→Air Demand) |
||
| Line 14: | Line 14: | ||
[[image:HHair_-_users.jpg|650px|left]] | [[image:HHair_-_users.jpg|650px|left]] | ||
| − | + | <br> | |
The Roller Frame is the big air user, requiring over 20 in<sup>3</sup> of air (at regulated working pressure) for each cycle. The Roller Frame is also the most frequently deployed air user on the robot. Data from H-H videos reveal the following use frequencies: | The Roller Frame is the big air user, requiring over 20 in<sup>3</sup> of air (at regulated working pressure) for each cycle. The Roller Frame is also the most frequently deployed air user on the robot. Data from H-H videos reveal the following use frequencies: | ||
Revision as of 16:57, 8 March 2014
- Modifying shooter code to extend the fire period
- Adding a third and then a fourth air storage tank
- Replacing the shooter solenoid
During match 11, a GoPro camera was set up to watch the pressure gauges. This video shows that the pneumatic system lost pressure at an extraordinary rate during the first 20 seconds of teleoperated play, consuming the entire storage reserve (two 35 in3 tanks at the time) during those 20 seconds. Thereafter, both storage and regulated pressure were identical, ranging between 30 and 45 psig. This pressure is too low for the shooter cylinder to retract the winch's dog gear. The compressor never turned off during the match.
So the proximate cause of the shooter failure was low air pressure.
Air Demand
There are three users of compressed air, the Roller Frame, Shot Angle and Shooter. Air requirements for each of these are:
The Roller Frame is the big air user, requiring over 20 in3 of air (at regulated working pressure) for each cycle. The Roller Frame is also the most frequently deployed air user on the robot. Data from H-H videos reveal the following use frequencies:
