Hackbots 3414 2024 Minibot

[FinIce]

Hello there!

I have been playing around with trying to make a minibot smaller than Shrinky Dink, with the constraints of this game. At the same time if my team ever wanted to make this thing, i was trying to make it as cheap as possible given my teams manufacturing ability. I have been tinkering on this for a while, showing it off through its CAD in Weekly Wins and Team A vs. Team B.

With the intro none of you probably needed, I present Wingnut:

At Speaker

Design Specs

• 10" x 8.75" base
• ~28 lbs w/out bumper and battery
  • ~58.5 lbs total
  • ~14.75 lb bumpers
• ~23" tall starting config

Features

• 2x 6:1 to 9:1 VersaPlanetary Neo 550 drive
  • 3" drive wheels with plastic skids
• Passive 4-bar shooter/intake/amp?/climb?
• 3" shooter wheels
• 2x Neo Vortex direct drive shooter
• ~6" horizontal note compression
• Bottom mounted bumpers
• 1/4" Steel baseplate
• Other stuff, you can ask me!

Electrical Boards

Board Stages:
Segmented into 4 distinct boards (the last two are essentially the same). The first one is mounted using 4 screws, and also holds the bumper, and arm bases onto it. The boards have on them respectively:

• Bottom 1st Stage: 2x Sparkmax for drive
• Top 1st Stage: CTRE PDP
• 2nd Stage: Battery (contrained by 2 battery straps)
• 3rd/4th Stage: Switch, Radio, RPM, Rio, RSL

Battery swap procedure:

• Drop the Shooter mechanism to extended position
• Unscrew the 4 10-32 screws attaching the 3rd Stage
• Swing the 3rd stage opposite the Shooter mechanism
• Unplug battery
• Undo the battery straps

Bumpers

Taking advantage of the 1/4" allowance for hard parts, uses 1/4" steel brackets to add weight and strength. I was inspired by 1100’s bumper mounts, so this bumper drops out the bottom and is mounted using 4 bolts into churro.

Starting and Extension Configurations

Have fun with the CAD, do be warned its barely refined and prepped:

Onshape

Thank you!

[BryceHanson]

I’m just picturing this guy drawing a foul because a note fell on top of it and completely encircled it

[scimn27]

Because the angle it shoots at is so high I’m wondering if it would be possible to shoot into the amp?

[FinIce]

It was designed to be able to shoot into the amp, however I put amp? because I can’t confirm if it can unless it is is built.

I have a plan to add an amper bar that hopefully doubles as a climber too that will make it more likely.

[DunaganM]

Really interesting architecture!
Just out of curiosity, what does onshape say the CG is with the mechanism extended?

[AriMB]

Are those skid plates instead of wheels on the non-driven corners? Why not omni wheels?

Also what are the third sets of bearings for on the shooter base plates? Just to keep the plates symmetric or do they serve some purpose?

[FinIce]

Thank you!

[FinIce]

@AriMB

Are those skid plates instead of wheels on the non-driven corners? Why not omni wheels?

Yes, they are skid plates! I couldn’t fit omni wheels with where I wanted the wire passthrough holes to be for the Sparkmaxes. I’m sure I could have made it work, but the skid plates seemed the better idea at the time.

@AriMB

Also what are the third sets of bearings for on the shooter base plates? Just to keep the plates symmetric or do they serve some purpose?

I was lazy and just did a Replicate function on all the holes there, so no, they do not. To keep individual part count down, I just had the holes mirrored with different attachment points.

[MOCTA1189]

@FinIce

Hello there!

[FinIce]

Okay, so I got a little curious as to how small I can get this thing if I lessened my requirments to just amp-Everybot like D.I.N.G.U.S..

So, I got it to 8.5" x 8.5" and after a couple new plates:

And without the amp stuff:

=

Proof if needed

All the basic construction of the robot remains the same, and I could get it smaller, but this was already rushed, so I might get to it later.

[scimn27]

@FinIce

Okay, so I got a little curious as to how small I can get this thing if I lessened my requirments to just amp-Everybot like D.I.N.G.U.S..

Ok personal opinion. Just amp robots are great and all, but the amp and speaker minibot looks better than the amp minibot

[FinIce]

I definitely agree wholeheartedly.

This was a complete rush job of a CAD, and I already knew that fitting the 4-bar shooter/amp mechanism was going to be a long shot based off previous CAD testing, so I just didn’t even bother trying to fit it.

Also, I dont think I can get an amp bar into the original unless it is actually built, I would need to do a couple of bent-polycarb things to act as an arm because the thing is too short and not enough space is available to make the amp bar be a rigid body and also fit.

[sticky_1629]

It would be cool to see the motor on the amp mechanism moved towards the base, and have the mechanism run off of a belt. Maybe even move to a cim class motor to eliminate the gearbox.