BaneBots

[MattC9]

It all depends, I would much rather use a FP than any BB because it has more gearboxes it can adapt to, and last year BB had a horrible rate at witch they got there products to you. But we zapped our rs-775's and they worked fine.

[apalrd]

I would just use a 550.

It has the EXACT SAME mounting pattern as the FP, the power output is almost as much as the 775 (~250 vs ~265 watts), it's slightly lighter (which unfortunately means it is more power dense and will heat up faster), and the output speed is comparable to a FP (within 10%, close enough to mate them directly).

Just so everyone knows:
The -0673 (2011) FP has more power than any single Banebots motor (I calculated 291 watts).

[MattC9]

Originally Posted by apalrd

I would just use a 550.

It has the EXACT SAME mounting pattern as the FP, the power output is almost as much as the 775 (~250 vs ~265 watts), it's slightly lighter (which unfortunately means it is more power dense and will heat up faster), and the output speed is comparable to a FP (within 10%, close enough to mate them directly).

Just so everyone knows:
The -0673 (2011) FP has more power than any single Banebots motor (I calculated 291 watts).

Do you think they will let us use more FP's next year?

[Hawiian Cadder]

i wish they gave us more FP motors. we burned like 5 this year, but now that we know how to deal with them, i think that they could be pretty sweet. i think the rs550's in a double doozy is a bout the best you can get short of a cim for complete durability and power.

[PatrickBrew1086]

Originally Posted by Hawiian Cadder

i think the rs550's in a double doozy is a bout the best you can get short of a cim for complete durability and power.

My team, 1086 Blue Cheese, thought the same thing after having a CIM on our elevator at our first regional and tested with the single FP between our first and second regionals. After finding that the FP stalled we tried the Double Doozy on a custom gearbox we made, which was basically a flattened out ToughBox due to size restraints in the space around our elevator. Originally we had problems with the pinion gear teeth sheering off, turns out they were created out of a bad batch of metal. Of course AndyMark express shipped us 5 or 6 more out of a good batch and we never had one sheer again. Back to the point of this post, we found that under the stress we put our 2 BaneBots 550's under in our elevator was enough to burn them out about every 2 to 3 matches. The problem even continued when our elevator had two constant force tension spring helping each stage up individually. Hope our experiences with this help!

Patrick Brew
First Team 1086 Blue Cheese

[MrForbes]

At this time, we have no idea what motors we'll get to use next year. I doubt that we'll get known defective motors.

[Taylor]

Originally Posted by MattC9

Do you think they will let us use more FP's next year?

We don't even know if we're allowed to use aluminum next year (1714 FTW)

Originally Posted by squirrel

At this time, we have no idea what motors we'll get to use next year. I doubt that we'll get known defective motors.

If we get guaranteed good parts, the KoP may jump to $7K.


wow. two smilies in a row. I better take my temperature.

[MattC9]

Originally Posted by Taylor

We don't even know if we're allowed to use aluminum next year (1714 FTW)



If we get guaranteed good parts, the KoP may jump to $7K.


wow. two smilies in a row. I better take my temperature.

Wait what no aluminum?!

[R.C.]

Originally Posted by MattC9

Wait what no aluminum?!

Yep totallly illegal and not allowed

-RC

[MattC9]

Good thing were learning how to use carbon fiber & polyurethane this off season

[Jeffy]

Originally Posted by PatrickBrew1086

My team, 1086 Blue Cheese, thought the same thing after having a CIM on our elevator at our first regional and tested with the single FP between our first and second regionals. After finding that the FP stalled we tried the Double Doozy on a custom gearbox we made, which was basically a flattened out ToughBox due to size restraints in the space around our elevator. Originally we had problems with the pinion gear teeth sheering off, turns out they were created out of a bad batch of metal. Of course AndyMark express shipped us 5 or 6 more out of a good batch and we never had one sheer again. Back to the point of this post, we found that under the stress we put our 2 BaneBots 550's under in our elevator was enough to burn them out about every 2 to 3 matches. The problem even continued when our elevator had two constant force tension spring helping each stage up individually. Hope our experiences with this help!

Patrick Brew
First Team 1086 Blue Cheese

Our story is exactly the opposite of this. We had one RS-550 on our 4 bar arm all year long. The 256:1 gearbox wore much faster than the rs-550. During one match, we had part of the surgical tubing break, and the rs-550 let off a bit of smoke and heated up because the far to intense for the gearing. The motor still ran strong for 15 more matches.

The rs-550s will get hot if you put them in a situation where they endure ~>50% load for 10-15 second intervals with short breaks inbetween. However, we stalled the motor (by accident) giving it ~20% power for 15 minutes or so with only mild heating of the motor.

[Ether]

Originally Posted by Jeffy

we stalled the motor (by accident) giving it ~20% power for 15 minutes or so with only mild heating of the motor.

Did you really mean you gave it 20% power?

At 12 volts at stall, you are giving it 1020 watts of power. 20% of that is 204 watts power. I doubt the 550 could dissipate 204 watts for 15 minutes with only mild heating.


Maybe you meant you gave it 20% voltage?

20% of 12 volts is 2.4 volts. At 2.4 volts at stall, you are giving it 41 watts of power. Even at that lower number, the 550 would get pretty warm after 15 minutes.

[OZ_341]

Any company that mass produces a known defective or dangerous KOP item and them refuses to support the repair and/or replacement of that item should be unceremoniously DUMPED as a sponsor. And if FIRST invites such sponsors back then shame on them.

It is pure coincidence that I am writing this opinion in this particular thread.

[Hawiian Cadder]

one way to prevent motors burning is to put in some software protection, if you have CAN on that motor you can limit the amount of sustained current eg, if more than 60 amps is going to the lift FP for more than .25 secs with no increase in speed, then kill it. we did this on two motors i believe, our roller and our lift, while the FP was a little harder to prevent from smoking, we stalled our roller every time we picked up a tube, and never had an issue with it.

[Chris is me]

Originally Posted by Hawiian Cadder

one way to prevent motors burning is to put in some software protection, if you have CAN on that motor you can limit the amount of sustained current eg, if more than 60 amps is going to the lift FP for more than .25 secs with no increase in speed, then kill it. we did this on two motors i believe, our roller and our lift, while the FP was a little harder to prevent from smoking, we stalled our roller every time we picked up a tube, and never had an issue with it.

The Banebot failures have nothing to do with stalls, at all.