My team is disapointed with the change of motors this year and we have gotten into a discussion over wether using the old globe motors is legal. Any answers for us?
Thanks!
Read the manual…
Can you use them? That would depend on your level of experience…
May you use them?
Not on a legal FRC robot…this year… so far
Short answer:
Answer
[spoiler][spoiler=]I really shouldn’t tell you[spoiler=]I think you should read the manuel[spoiler=]I still don’t want to tell you.[spoiler=]If you are that persistant…[spoiler=Manuel reference]
Motors specifically permitted on 2011 FRC ROBOTS include:
A. all motors, actuators, and servos listed in the 2011 KOP Checklist,
NO!!!
[/spoiler][/spoiler][/spoiler][/spoiler][/spoiler][/spoiler]
Read the Manual::rtm::
You can use the globe transmissions, if they weren’t modified previous to this season, and adapt a kit motor to the housing. There are easier ways to get what you need via AndyMark and Banebots. 
No, but you are merely feeling a sense of withdrawal, the same experienced by many teams upon the removal of the van door motor or the drill motors from kits in years past. The mighty Globe has finally run it’s course. 
I still experience a sense of withdrawal when I see a van door motor laying around the shop.
would’ve been nice this year, seeing as banebots has a 10-15 day lead time for gearboxes
Not to go too much off tangent, but wouldn’t it be nice if game hints actually told you what motors and quantities were in the KOP so that teams could order ahead of time?
No.
Yes
no, and the bane bots are a major disappointment as well, the rs775 is only 70 watts of power at 12 volts.
This is not true at all. The RS775-18v is over 200 watts of power when operating at 12v.
FIRST’s spec sheet refers to the 12v model.
At 40A, the rs775 has 270 Watts output, the same as a CIM.
motor torque graphs
[spoiler]
http://kamocat.com/robot/gameplay/[email protected]
http://kamocat.com/robot/drivetrain/cim_1.png
[/spoiler]
I have a question related to the tangent about the banebots motor…
Did the kit include the RS-775-18 or RS 775 12
It included the 18v motor. You should use the 18v motor.
I have to say I too am extremely dissapointed with banebots but also with FIRST for eliminating all the great motor options we used to have- Two FP motors, Globe motors, Van door, Keyang, seat motors. KOPs from the past used to have such a variety of power options, now all we have are little screamers that whizz along at 20000 RPM (aside from the sacred CIMs). I am sure it has made life much harder for many rookie teams and those short on resources.
It is my firm belief that banebots donated the motors to FIRST in hopes of it generating business for their company. What do you do with a motor that has a 20000 RPM output? The only logical solution given our weight and size restrictions is a planetary reduction. Who has the planetary reductions?
Unfortunately I don’t think Banebots anticipated the demand for their product and as a result the teams are paying the price in lost build time. I applaud Banebots for donating the motors for the KOP but I am furious that due to a lack of other options we have essentially been forced to buy their products to build our robots. What’s next? CIMs replaced by RS775s? All they have to do is donate a couple more RS775s with some CIMulators and FIRST will nix the CIMS. Then they have a monopoly on the motor supply to all teams and we are at their mercy.
Anyway, I have to get back to dissassembling cordless drills and trying to retrofit globe gearboxes… :mad:
Strangely we started using window motors this year, we only need two motors for our mechanisms (and one pneumatic cylinder, so I guess we also need the compressor with it’s motor). The window motors seem to be a pretty good fit with our two armed robot. And they’re free. And we have spares. We never have been able to figure out how to use a Globe motor for anything, ever.
Gosh, I hope we never have 775’s as the main motors in a DT. It isn’t a power thing it is a thermal mass thing. The CIM weighs in at a beefy 2.5 pounds and that heat dissipates through most of the motor. This makes it pretty hard to cook a CIM. Compare this to a 775 which is a pretty small motor with a ton of power. If we stall those out (a real possibility) they will cook much faster than a CIM.
Cordless drills, DOHT! Stupid Andrew, you have like 6 of those old Bosch transmissions sitting in the back room. Even pulled 4 of em off old bots. I’m gonna go bang my head on a wall in embarrassment of my mental failing.
Why do you really need to gear the motor(s) that slow? The slowest shaft on our 2011 robot only needs a three-stage reduction, and that’s our drive train in low gear. All other mechanism shafts on our robot spin well over 1000 rpm at nominal load. None of these are accomplished via planetary gear reductions, but rather via simple spur gear or timing belt speed reductions.
Seriously, with the FP and “choose any four” BaneBot offer, I absolutely love the motor selection this year. There are up to nine motors you can use on your robot that output over 250 Watts each! Compared to ~85 Watts for Globe, and less than 50 W for any past Window motor, this year’s motor selection is the best I’ve ever seen (since 2004). No other year has a team been able to throw over 1000 Watts into a manipulator and not sweat taking away drive train performance. While some may question the sanity of one kiloWatt manipulators, if you want to fly on water, you need power!
I am supposed to be afraid of offending the FIRST and BaneBot gods? This is an open forum and I am entitled to my opinion. Futhermore, teams have paid significant sums of money to compete in this competition. FIRST delivers a product and we expect it to be of the highest quality. These “slippery slopes” although possibly offensive and seemingly ungrateful representations of people’s dissatisfaction are what help improve the FIRST product.
All other mechanism shafts on our robot spin well over 1000 rpm at nominal load.
I hope you don’t have an arm on your robot.
I agree, the power is nice but not if you can’t use it. Why not go for more motors like the CIMs with a reasonable 5000RPM output? - The answer is they’re more expensive and the temptation to turn down a free set of motors is irresistable to the KOP designers. If the BaneBot motors were indeed a donation, then why did they have to get rid of all the other motor options? Why not improve the KOP and make it more diverse rather than saying “Oh, well we have these four motors… that should be enough…”