Sooo, SPIN UP META IS...? 😮

[BobbyfromJamaica]

You mean 60:12, always put driving gear first

[16688B_Oregon]

I got an idea, hear me out:

• Regular x-drive or 4 wheel omni tank
• Intake covering the entire front, preferably with two pistons that can raise it
• Intake can be used to turn colored rollers
• Turnable shooter, hole in bottom for loading
• Intake feeds upward into the hole, like a tank turret

[242EProgrammer]

So the motor distribution would be:

• 4 for drivetrain
• 1 or 2 for intake & roller spinner
• 1 for shooter turner
• 1 or 2 for flywheel

?
Or do you also need a motor to feed into the shooter spinner?

[AS2021]

yep, that’s what I was thinking. some robots from tipping point’s season could probably do that (including our team’s first one) we had an intake and we’re guessing it’ll work pretty well for this too

[BobbyfromJamaica]

You can’t expand past 18 inches

[amogus]

4m mecanum
2 piston antislipmat thrower
1m flywheel
1m intake+roller spinner
1m turret
1m feeder
I might be able to use a pneumatic feeder if I use pressure regulartor for 60 actuations so I can get an extra motor for controlling angle.

[Connor_Howard]

I see more teams early season going 4m tank, and then as motor sharing develops we’ll see more complex subsystems with 6m drives.

[Nikhil_Gajjar]

i think the meta with a 6m drive will be a 1m intake and 1m flywheel
but no clue how pistons will make too much sense

[7686B_Ian]

yes same difference lol

[7686B_Ian]

Pneumatic brake for shooting so ppl cant push u, also expansion at the end.

[Nikhil_Gajjar]

makes sense
but the brake would have to cleverly engineered so as not to break the actual piston
and only use it for retraction and extension

[7686B_Ian]

Just don’t use the piston for structure

[67203c]

So do single acting pistons use less air then double acting pistons?

[OscarMNOVA12]

Same amount of air when extending, but the DA cylinders use air to both extend and retract so yes the SA cylinders use a bit less air.

[ThoughtfulTexan]

Best practice is to not assume other folks use the same convention as you do, and clearly label your ratios. Especially when the conversation includes a diverse population of students at a variety of ages, across multiple countries.

Fact of the matter is that it depends what you’re aiming to express (torque v speed) and then what you’re using as your inputs. Different industries and professions have different conventions.

Check out this entire discussion on the issue.

Gear Ratio's - How to properly show them?

Gear ratio is an ambiguous term in my opinion. People can take it to mean tooth ratio, speed ratio, or torque ratio. You are better off using one of the latter two when referring to your gear train. I looked back in my textbooks and couldn’t find “gear ratio” anywhere. The second issue is that it is not clear what goes first, input or output. In my experience it has always been the latter (output:input). So a speed ratio of 3 has the output turning faster than a speed ratio of 2.

Edit to add, this official document from Vex about how to use gear ratios sometimes has the driven gear first - https://kb.vex.com/hc/en-us/articles/360035590932-Using-Gear-Ratios-with-the-V5-Motor

[Alpha_Goats_53999F]

The feeder could be done with pneumatics without much difficulty

[EuroDaPro]

im thinking
4 motor mecanum drive
1/2 motor flywheel
1/2 motor intake
1 motor roller
pneumatic expansion

also, my team is not too experienced, so we cant do odometry or something fancy like that. How would we be able to write a code to aim for the high goal?

[Dave-TBR]

Don’t use mecanums for this game, if you want strafing, do an x-drive (I also don’t think strafing is necessary for a low level team)

[EcstaticPilot]

Probably vision sensor

[15545G-SC]

What if we have ‘No Sensors?’