![]() |
Drivetrain, what did you use?
I just wanted to hear what people used for their drive trains including:
Team #? # of years of participation? # and type of motors? # and type of drive wheels? # and type of non-drive wheels? Transfer system(chains, belts, etc.)? Transmission (not including supplied ones)? Steering? Sensors? Success? Problems? Next year? My response: team 997 2nd year 2 drill motors 2 solid rubber 9"dia. 60 durometer 3" wide 2 wheel chair wheels direct drive via shafts and gears the supplied right angle gear box automotive rear-wheels steering no sensors we busted the supplied gear box once and our steering sucked never use automotive steering ever. next year simple box chasis tank steering as many motors as possible and a transmission. |
Team 696
3rd year team 2 drills and 2 chiaphuas 4 Skyway 9x2 Beadlok turned down to 8.5 di 0 non-drive wheels (casters are not allowed near our robots) #35 Chain with carbon steel sprockets riding on 5/8 keyway shaft 3.5:1 reduction between Chiss and Drills; 4.8 reduction between drills and wheels Skid Steering No sensors Much success, 9fps and loads of torque. Problems - Misalignment, shafts wandering out. Next year - Provided we have the same equipment, we will either do the same thing with some minor refinements or have a totally new 2 speed drive. Depends on game and engineer support. |
Team 296
5 years 2 drill, 2 CIM 4 solid rubber 6" wheels no non-drive wheels belts between the motors, chains to the wheels supplied transmission skid steering no sensors success - ~10 fps and lots of power problems with pulleys coming un-setscrewed and with drill transmission next year - depending on the game, maybe something a bit more complicated like crab |
Team 422
4 years 2 CIMs (previously 2 CIMs and 2 drills) 2 6 inch wide 6 inch diameter machined aluminum wheels with hard neoprene covering 2 HDPE machined skids - 3 inch diameter touching the floor Direct drive using a gearbox for the CIM to gear it down to the high speed of the drill; we then mated both on a giant 80-tooth gear on a 5/8" shaft to the wheels Two-wheel drive (tank-style steering) Two optical sensor encoder wheels to count the revolutions per minute The giant wheels were great on the ramp, and the CIMs gave us some good pushing power. Our robot was not symmetrical and the weight was balanced more over the skids, so we had some trouble getting weight issues settled. We eventually ended up placing over 20 pounds of dead steel weight over our drive train. Next year we're going to deal with the symmetry issues, but this two-wheel drive was very successful, small, and modular, so I think we'll keep it. |
Team 201
6 years 2 CIMs 4 1.5 inch wide, 6 inch diameter custom machined aluminum wheels No non- drive wheels Chain drive from a 2-speed transmission Skid steering No sensors Success- really fast, good amount of power, no reliability issues Problems- can't turn in high gear Next year- not my problem :p I'm a senior, though I hear my team is trying for swerve drive next year... we'll see... |
-Team 639 - Code Red Robotics
-This was 3rd year. -2x Chiapuas -2x Modified Skyway from Kit for back 2x Omniwheel with 65 grade urethane -No non-drive wheels -Chains -No Transmission, high torque 6.5fp -Tank Drive, logarithmic control -Optical Sensor for bin tracking -Great success watch www.orbitreview.com/~temp/639movies/639_d.wmv -None (each regional we had nothing to fix/tune after practice day because we actually spent the time to do tings right this year. We just left the robot outside in Chesapeake for cooling :) -.... very secret |
Team 6
9? maybe 10? 2 drills, 2 CIMs 4" brecoflex pulleys 0 Brecoflex belts (the green) None Sort of None A LOT of speed. We were one of the fastest at UCF. We couldn't really turn until Sat. after we broke the belts in a little Depends on the game |
Team #1018
First Year 2 drill motors 2 pneumatic tires from a hand cart 2 UHMW skids #35 Chains Sprokets from MSC with about a 2:1 ratio Tank Drive No Sensors Nice mix of torque and speed In Chicago we had problems with the chains walking of and in one case had a connector link fall off I think we are going to try to make a gearbox this summer |
Team 481
4th year 2 Drill, 2CIM 4 Rubber skyway wheels 9" dia 0 non- drive Gears for cim, provided gearbox for drills 0 sensors Succesful...kinda - drill trans kept breaking, cim gear box sheared teeth and broke shaft, but no problems at nationals Next year...shifter |
Re: Drivetrain, what did you use?
Quote:
-6 years of participation. -2x CIM, 2x Drill, and 2x Fisher-Price. -Wooden wheels with tread, four-wheel drive. -No non-drive wheels. -Chains run to front and back wheels for four-wheel drive. -One-speed only. -Tank-style steering. -Sensors on the wheels to count revolutions and/or pointing down to detects the line or the HDPE. -A good balance between speed and power; in a fairly high gear (speed of about 9ft/s), we could still push well because of six-motor drive, with a low-friction simplistic gearbox -It draws way too much power, and by the end of a heated match, our robot can barely move. So many drive motors sometimes cause us to trip breakers. We made the mistake of using small chain rated for about 1000 pounds (25), instead of something stronger, we went through 13 of them because they stretched and snapped all the time. Our treads kept delaminating from the pushing matches we got into, so a better means of traction needs to be developed. -Next year, we're going more complex, possibly with a new gearbox design conceived on the plane back from Houston that can do speed and power without most of the drawbacks we faced, and that's all I'll say. We're looking at tank treads also. Anything else is just speculation, stuff I don't know, or stuff I don't want everybody to know. :) |
Team 25
7 years participation (2 under my belt) 2 drills, 2 Chippys 3 wheels a side. 0 nondrive wheels Direct drive (all gears baby!) 1 speed Tank steering No Sensors Success- 13.6 fps, 3.2-3.6 autonomous time. Problems- Drills! ARGH! Drove us crazy at first. Our programmer and pit crew came through in a miracle to fix that one. Next year? Who knows. |
Re: Drivetrain, what did you use?
Quote:
|
Team 294
Seven Years 2 Drill motors 2 9 inch skyways 2 non drive wheels (locked casters) First gearboxes None (we stay in low gear) 2 wheel steering None for drive SoCal regional finalists (we lost one match) We didn't lock the casters at first, causing problems going up the ramp and popping breakers at Phoenix Next year we are planning something like 111s drive, that was our plan A (ended up with D) |
Team 212
5 of years of participation 2 drills 8 inch pneumatich wheelchair wheels No non drive wheels Chains Gearing off of the FIRST gearbox Tank style, we had a very short wheelbase so we turned really well and had the 4 wheels on the ground for the grip No sensors Never had any problems with the drive train, we made this thing like a car with hubs and all it was 1000% sucessful Next year? i dont know depends on the game duh! |
Team 461 - Westside Boiler Invasion
4 Years 2 Drill Motors 4 Skyway wheels. Modified and lathed down an inch or so with supergrip rivited into a channel in the wheel for better traction. None Chain. 1.5:1 Gear ratio None Tank Rotary Encoders on the front wheels Speedy, Robust, Easier to fix and replace stuff then our previous attempts at a drive, we just decided to go simple and not mess with complicated stuff. We didn't have alot of torque. We are going to dive into the wonderful world of transmissions:) |
| All times are GMT -5. The time now is 03:11. |
Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi