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Unread 29-12-2008, 12:24
James Tonthat James Tonthat is offline
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FRC #0148 (Robowranglers)
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Re: 3-Axis Joysticks

Quote:
Originally Posted by Steve_Alaniz View Post
Back to the original question:
We've experimented with Mechanums and use the Saitek ST290 joystick. Everything works great and except for a few comments that they joystick is too sensitive there have been no problems. We're still trying to decide the best way to give less sensitivity at low speeds and more at high, but haven't decided on a math formula solution or a look up table. ( Haven't figured out look up tables in abview yet...)
We've been working with the new controller so we can confirm it works.

Best wishes

Steve
Our set up had the trigger as a divider for our mechanum drive (using all axis') You could do something similar, it's quite intiutive. When the trigger wasn't held down, it divided all the axis values by 1.5-2 (depending on what the driver felt like) and when the trigger was held down, it was like a turbo giving you full axis values. We did end up dividing the twist axis overall since it was very sensitve and the throw on the joystick was about 60 degrees.

To Gblake,

There's nothing wrong with using a three axis joystick. We used a single Saitek Aviator for the entire robot, won two regionals (alliance cap both times) and won the Rockwell Automation Innovation In Control award at LSR.

The Saitek Aviator was brilliant since it had three thumb buttons, conviently one that was a red led with a safety so that was our 'fire' button last season
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James Tonthat

Mechanical Engineer, RackSolutions, a subsidiary of Innovation First International

Lead Engineer - Texas Torque - 2009-2014
Mentor - Robowranglers - 2015-
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