Thread: How much Power?
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Unread 24-01-2017, 09:03
Kartoffee Kartoffee is offline
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Re: How much Power?

The Bionic Blackhawks are using:

Drivetrain - 6 CIM's
Shooter - 1 775 pro (though I'm pushing for 2)
Intake - 2 BAG
Climber - 1 mini CIM
Gear - 1 bag and 1 snowblower/servo for actuating our grip on the gear

Unfortunately, I'm not sure I can really reveal too much information yet, but we're looking like we might be too tight on space to afford extra motors.

Our team is highly in favor of powerful drivetrains. Last year, we had only 4 CIMS, due to the design of our raised middle wheels to assist with the breach (4 wheels on carpet, 6 on some defenses). However, we also chose a 2 reduction clamping gearbox, and 8" wheels that made us both fast and strong. This year, we planned to do the same, but with 6 4" wheels instead. We calculated the speed to be about 4 ft/s, so that was quickly shot down. We would use the WCD design, but space is limited and the belts are obnoxious. I think what we did was a valid trade off, but I think we struck a balance of power and speed. No, we will not be using anything like Mecanum or Swerve. I don't plan on spoiling what we did with 6 CIMs though.

Our shooter currently has 1 775 pro, which is quite under powered. I'm in favor of adding another directly opposing, and removing our 3:1 reduction. This would give us a 2:1 stalling torque, yet still a 1:1 speed. As it stands, we barely reach the goal at maxed power (4 inch flywheel). My only concern is voltage. Last year, with 2 775's on our shooter, we had to be lined up before revving, else our voltage would drop and we couldn't move left and right. I think not having literally a square of pneumatic wheels would help.

As for the gear mechanism, well, let's just say I hope you guys get to see it sometime. It's really... unique? We hope that our strategy was correct and people don't plan on driving over gears.

Our climber is a winch, about 1.5-2" diameter, that will climb up webbing. It's a quick little thing, so we'll see how we do.

Our intake, in its prototype form, is required to throw the fuel up about 18". I hope this isn't the final design, especially with BAGs being inferior to 775's.
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