pic: This is our robot as of last night. Alot more should get done this week now that things are in place

[dfukuba]

loading photo ...

[AdamHeard]

That's like a huge diameter tube to use on the arm. Is that the final stage or is there going to be more after that?

It seems like if there was more, the window motor probably can't handle the load very quickly.

[Alex Cormier]

tracks or 4wd?

[Ben Piecuch]

I spy a Colson wheel in the background, so I'm assuming it's a 4wd w/ colsons.

Looks very nice and clean. I too am wondering about that massive bazooka tube for an arm. As it sits right now, it can't reach the floor, so I'm guessing that it either telescopes or has a wrist that's yet to be added.

I guess your electrical guys are pretty quick. They need their cables fed at 400rpm!

BEN

[dfukuba]

The Tube is 3" diameter .125" wall. A bit overkill but after the cheesing it only weights 3lbs. There will be a grabber on the end of the tube.

We tested out the window motors and they will me powerful enough to run the arm. We will have one more added on the other side, and it will be geared down a little bit. And because there is no back dive, it helps with moving the arm.

--Dan

[Kevin Sevcik]

He said 6WD. I'm hoping there's another border piece on the exposed side to support the other side of the tranny shaft. Otherwise.... ick. Seeing a shaft loaded like that seriously distresses me.

[Wetzel]

Originally Posted by Kevin Sevcik

He said 6WD. I'm hoping there's another border piece on the exposed side to support the other side of the tranny shaft. Otherwise.... ick. Seeing a shaft loaded like that seriously distresses me.

It looks like there are mounting holes on either end of the robot for another piece outside the shaft.

Wetzel

[Nuttyman54]

unless they've changed the outside (which is entirely possible) this post of their CAD earlier seems to show that it is indeed supported on both sides

[Scion13]

How what weight class is your robot in? Can it reach the top spider?
Looks good man.

[Choi9111]

Sweet! what weight class is ur robot?

[Guy Davidson]

As of right now, it fits in the 120lbs / 4ft class. It's supposed to be able to reach the top goal, but we won't know until we build the grabber onto its end.

There will be a bracket mounted on the outside of the wheels, and there will be a lowered middle wheel. The general design is the same, but the grabber looks different. Functionaly it's supposed to be the same though.

-Guy

[=Martin=Taylor=]

I'm not sure I understand how that will fit in the 72" limit. If your arm is 50" long and the bot is 38" then you will be 88" in total (of course I'm just guessing).

[dfukuba]

Originally Posted by Kevin Sevcik

He said 6WD. I'm hoping there's another border piece on the exposed side to support the other side of the tranny shaft. Otherwise.... ick. Seeing a shaft loaded like that seriously distresses me.

I plan to have a plate on the end, but did not plan to support the ends of the shafts. This was something that had also been bugging me for a while. I am thinking about making some kind of pillow block which will mount on to the side plate.

My original idea was to put the wheels as close to the gearboxes as i could so that most of the load would be on the bearings and not the shaft. Because i had never tried this before i was unsure how it would turn out.

--Daniel

[=Martin=Taylor=]

Originally Posted by AdamHeard

It seems like if there was more, the window motor probably can't handle the load very quickly.

We did some tests with our 5lb. grabber on the end of an arm aprox. the same length as this.

One keyang motor was not able to lift it. After adding a spring, which took virtually all the load off the motor, the keyang could lift it with ease.

However, even without a load on the motor, a light tap on the end of the arm was capable of stripping the gear inside the keyang. Further investigation found that the plastic gears inside these motors have very small teeth and are easily damaged.

Just a warning...

[AdamHeard]

Originally Posted by Hachiban VIII

We did some tests with our 5lb. grabber on the end of an arm aprox. the same length as this.

One keyang motor was not able to lift it. After adding a spring, which took virtually all the load off the motor, the keyang could lift it with ease.

However, even without a load on the motor, a light tap on the end of the arm was capable of stripping the gear inside the keyang. Further investigation found that the plastic gears inside these motors have very small teeth and are easily damaged.

Just a warning...

The keyang motors aren't that powerful when compared to the others in the kit.

A FP motor (or the BB RS540, which has less power) into the 256:1 42mm gearboxes from Banebots make an easy to integrate motor with lots of torque.

Or take a hint from 968/254 (60 too maybe?) and swap you FPs into the drive to free up two small CIMs to use on the arm.