Go to Post 99.9999% of the FIRSTers are really nice - Denman [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Closed Thread
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 31-08-2006, 01:29
Gabe's Avatar
Gabe Gabe is offline
Pocket Full of Tools
FRC #0604 (Quixilver)
Team Role: College Student
 
Join Date: Mar 2006
Rookie Year: 2001
Location: California
Posts: 654
Gabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond reputeGabe has a reputation beyond repute
Dewalt transmissions

What are people's experience with using DeWalt transmissions on their robot? I am looking into the possibility of using Dewalts with CIM motors to drive a robot and also shift speeds on the fly. The idea is very attractive but I am wondering how well they would hold up in competition. I have looked over in great detail the wonderful white paper on these transmissions, but still am left with questions on durability.

Pictures of the DeWalt transmissions on robots would also be very nice.
__________________
Team site: Q U I X I L V E R
My favorite tool is my imagination; I’m always finding new ways to use it.
  #2   Spotlight this post!  
Unread 31-08-2006, 08:40
Francis-134's Avatar
Francis-134 Francis-134 is offline
Lifer
FRC #0190 (Gompei and the Herd)
Team Role: Mentor
 
Join Date: Jan 2003
Rookie Year: 2003
Location: Worcester, MA
Posts: 602
Francis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond reputeFrancis-134 has a reputation beyond repute
Re: Dewalt transmissions

I don't have any pics of 40's robot on me, but I can tell you that our Dewalts held up very nicely over the span of two regionals, the championship and three offseason events. Occasionally, you may need to perform some minor maintenence (tightening screws and reapplying locktight), but nothing major has gone wrong for us.
__________________

Email | Twitter | Facebook | YouTube | Twitch
iTunes Podcast | Snapchat

A proud alumnus of teams 134 and 40 || Mentor of Team 190 || Director of Fun for BattleCry@WPI
  #3   Spotlight this post!  
Unread 31-08-2006, 10:25
ajlapp ajlapp is offline
Registered User
AKA: Anthony Lapp
None #0118 (Team RUSH and Robonauts)
 
Join Date: Sep 2001
Rookie Year: 1996
Location: Ortonville, MI
Posts: 648
ajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond reputeajlapp has a reputation beyond repute
Re: Dewalt transmissions

simple answer, they are amazing.

we have beat the tar out of them for two seasons without a failure.

we used them in 2006 with the large cims and in 2005 with the small. we shift them on the fly and they always perform.

but to be honest, after seeing how some robots performed last year using the kit tranny, we may not use them again.
__________________
Anthony Lapp
FIRST Engineering Mentor
Owner/Operator 221 Robotic Systems
221 Robotics Systems - Quality Hardware, Made in the USA
RobotOpen
anthony@221robotics.com
Twitter us: @221RobotSystems
Team 1 --> 94 --> 68 --> 221 --> 857 --> 27 --> 118
Design Engineer/Fabricator and 17 year vet
Team Rush (FRC27) and Robonauts (FRC118)
  #4   Spotlight this post!  
Unread 31-08-2006, 11:47
Dick Linn's Avatar
Dick Linn Dick Linn is offline
Registered User
no team (Synergy)
 
Join Date: Jan 2003
Rookie Year: 2001
Location: Midlothian, VA
Posts: 679
Dick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond reputeDick Linn has a reputation beyond repute
Send a message via AIM to Dick Linn
Re: Dewalt transmissions

These folks may have mounts and upgrade parts that are of interest to anyone using Dewalt trannies: http://www.dcwaterjet.com/dustin.shtml

Trannies and output shafts: http://www.robotmarketplace.com/marketplace_dewalt.html
http://www.robotmarketplace.com/marketplace_dustin.html
__________________
Richard Linn

Proud father of Marine LCpl. Karl R. Linn
Co-founder Team 975
KIA, Iraq 1/26/2005
  #5   Spotlight this post!  
Unread 31-08-2006, 12:37
EricS-Team180's Avatar
EricS-Team180 EricS-Team180 is offline
SPAM, the lunchmeat of superheroes!
AKA: Eric Schreffler
FRC #0180 (SPAM)
Team Role: Engineer
 
Join Date: Apr 2002
Rookie Year: 2001
Location: Stuart, Florida
Posts: 561
EricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond reputeEricS-Team180 has a reputation beyond repute
Re: Dewalt transmissions

SPAM has had excellent results with them over the last 2 seasons, and I would not hesitate to recommend them. We do have to watch the adjustment of the lever arm we use, to attach the shifting servo to the shift mechanism. It tends to get out of adjustment over the course of a day of competition, and we will not always get 3rd gear. Other than that, they are solid.

Eric
__________________

Don't PANIC!
S. P. A. M.
  #6   Spotlight this post!  
Unread 31-08-2006, 13:09
Ben Piecuch Ben Piecuch is offline
Bengineer
no team
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 2000
Location: Providence, RI
Posts: 336
Ben Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond reputeBen Piecuch has a reputation beyond repute
Re: Dewalt transmissions

We used Dewalts for the 1st time last year. We were extremely happy with them, and didn't really have any major problems with them. We did find that the press fit gear on the CIM output shaft actually moved on us (slid inward) and we lost one of the gears due to this.

(The press fit gear is a cluster, and the larger teeth failed to mesh with the lock-out ring for 3rd gear.)

Other than that, they shift quite smoothly and were relatively cheap. However, I think we'll go back to the kit tranny for this year. It took almost 3 weeks to get the parts machined, assembled, and tweaked. That's far too long to wait for a drivetrain. We're also looking at some similar two speed drill gearboxes. No details as of yet, but we found that the 3rd gear wasn't all that useful on the Dewalt, even with full runs across the field.

Here is are a link to our '06 pictures. I think weeks 3 and 4 of the build pages show most of what you're looking for. You'll also see the custom mounts we made, which was required to run one length of continuous chain.

GUS '06 Photo Album

I can snap some more pictures of the gearboxes if required. Best of luck!

BEN
  #7   Spotlight this post!  
Unread 31-08-2006, 14:57
Bill_Hancoc's Avatar
Bill_Hancoc Bill_Hancoc is offline
Volkswagen Enthusiast
AKA: Bill Hancock
FRC #0573 (MechWarriors)
Team Role: Mechanical
 
Join Date: Mar 2005
Rookie Year: 2005
Location: Ortonville MI.
Posts: 589
Bill_Hancoc has much to be proud ofBill_Hancoc has much to be proud ofBill_Hancoc has much to be proud ofBill_Hancoc has much to be proud ofBill_Hancoc has much to be proud ofBill_Hancoc has much to be proud ofBill_Hancoc has much to be proud ofBill_Hancoc has much to be proud ofBill_Hancoc has much to be proud of
Send a message via AIM to Bill_Hancoc
Re: Dewalt transmissions

Ours were great...we had four, one driving each wheel and we had excellent pushing power and speed...the only problem we had was not related to the transmissions them selves so i wont even put it here....they did tend to put out smoke tho when you shifted them and held the shifter in between 2 gears for too long but other than that excellent
__________________

MechWarriors 573

  #8   Spotlight this post!  
Unread 31-08-2006, 15:15
yodameister yodameister is offline
The Mad Chemist
FRC #2791
Team Role: Teacher
 
Join Date: Jan 2006
Rookie Year: 2006
Location: Latham, NY
Posts: 313
yodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant futureyodameister has a brilliant future
Re: Dewalt transmissions

We used them this year. Our team was not impressed at all with the Dewalts. Our being a rookie team may have had something to do with it though. We had problems with the pressed on gear spinning. The problem was solved with using a key. We seemed to lose some of the gears (most likely out of adjustment). Next year we will most likely be using the AM 2 speed (depending on the game of course).

The premise of the trannies is really good, and we were very excited about using them as so many teams had success with them. I suspect if we had more experience with them, we would use them again. They did shift nicely and the gearing was appropriate to this years game. If you use them, don't be afraid of the miserable noise they make when shifting, we saw no damage to the gears after 3 regionals of use. The noise comes with the terrotiry.

I hope this helps, and the best to you and your team this year.
  #9   Spotlight this post!  
Unread 31-08-2006, 16:57
Starke Starke is offline
Producer at The RoboSportsNetwork
AKA: Matt Starke
FRC #0174 (Arctic Warriors); (Alumni: 340 (GRR), 1126 (SparX))
Team Role: Leadership
 
Join Date: Apr 2005
Rookie Year: 2003
Location: Rochester NY
Posts: 691
Starke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond reputeStarke has a reputation beyond repute
Re: Dewalt transmissions

Team 340 used the DeWalt 3-speed in 2005, and I posted a report about our experience with them here .
__________________


Team 340 | G.R.R. | Alumni/Mentor | 2003-2007, 2010
Team 1126 | SparX | Engineer | 2008-2009
FRCDesigns.com | Engineer | 2011 - Present
Team 174 | Arctic Warriors | Advisor | 2012 - Present
  #10   Spotlight this post!  
Unread 31-08-2006, 22:20
Fritztopher's Avatar
Fritztopher Fritztopher is offline
Registered User
AKA: Fritz
FRC #1418 (Vae Victus)
Team Role: Scout
 
Join Date: Mar 2005
Rookie Year: 2005
Location: Falls Church, VA
Posts: 9
Fritztopher is on a distinguished road
Send a message via AIM to Fritztopher
Re: Dewalt transmissions

We used the dewalts with the small CIMs this year (based on the NBD white paper), and we never got them to work right. We had major problems with the sun gear at first, and we actually cracked one while modifying it. Then we couldn't get them to mount properly on the robot, and we ran into problems shifting. It might have worked if we had had enough time to get them to work, so I would definitely recommend tinkering with them in the off-season before deciding to use them on your robot. Given the time it took to get them to work halfway, we will not be using them again.
__________________
Hmmm....
  #11   Spotlight this post!  
Unread 31-08-2006, 22:33
fimmel's Avatar
fimmel fimmel is offline
Founding Mentor, Team 2370
AKA: Forest Immel
FRC #2370 (iBots 2370)
Team Role: Mentor
 
Join Date: Dec 2005
Rookie Year: 2005
Location: Castleton, Vermont
Posts: 325
fimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond reputefimmel has a reputation beyond repute
Re: Dewalt transmissions

team 885 is trying them now for next year......we havet got them yet (backorder) but i hope all goes well
/forest
__________________



  #12   Spotlight this post!  
Unread 31-08-2006, 23:16
Jack Jones Jack Jones is offline
Retired
no team
 
Join Date: Jan 2003
Rookie Year: 2003
Location: Waterford, MI
Posts: 964
Jack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond reputeJack Jones has a reputation beyond repute
Re: Dewalt transmissions

Quote:
Originally Posted by Fritztopher
... We had major problems with the sun gear at first, and we actually cracked one while modifying it ....
A common malfunction, so I hear, even for veteran teams.

This design is one way to do away with removing the planet axis pins, drilling the sun gear, and pressing the top-hat onto the CIM shaft. No press fits are necessary. The adapter slides onto the CIM's shaft, and the four holes slide onto the planet pins. We (1213) water cut ours from 0.25" stainless, which is how we can leave the key in the center hole. But they could be cut from carbon steel, drilled, and notched to accept a piece of key stock. We ran them at all four corners for over 150 matches and many many hours of practice without any problems.
  #13   Spotlight this post!  
Unread 01-09-2006, 00:18
woody's Avatar
woody woody is offline
Too much metal for one hand! \m/
FRC #0033 (Killer Bees)
Team Role: Alumni
 
Join Date: Jul 2006
Rookie Year: 2005
Location: Michigan
Posts: 90
woody is a splendid one to beholdwoody is a splendid one to beholdwoody is a splendid one to beholdwoody is a splendid one to beholdwoody is a splendid one to beholdwoody is a splendid one to beholdwoody is a splendid one to behold
Re: Dewalt transmissions

We used the dewalts this year and were quite pleased with them. We only noticed two minor difficulties, both of which were at least partially our fault:
1. The yellow case MUST remain on the transmission. If its not there, the plastic shifter piece expands and can pretty much render the transmission useless. It always helps to read the directions : )
2. The mounting plate for the shifter servo needs to be fairly rigid. We ended up using some .030 or similar aluminum and bent flanges along the edges to strengthen it a bit.
Overall they are pretty reliable and you cant beat the light weight. Plus they're not too terrible to modify for use with CIM's.
__________________
"The greatest of all mistakes is to do nothing because you can only do a little; do what you can." - Sir Sidney Smith
  #14   Spotlight this post!  
Unread 01-09-2006, 00:43
ebmonon36's Avatar
ebmonon36 ebmonon36 is offline
Registered User
AKA: Eric Bredehoeft
FRC #1018 (Robodevils)
Team Role: Mentor
 
Join Date: Dec 2002
Rookie Year: 2003
Location: Indianapolis, IN
Posts: 428
ebmonon36 has much to be proud ofebmonon36 has much to be proud ofebmonon36 has much to be proud ofebmonon36 has much to be proud ofebmonon36 has much to be proud ofebmonon36 has much to be proud ofebmonon36 has much to be proud ofebmonon36 has much to be proud ofebmonon36 has much to be proud of
Send a message via AIM to ebmonon36
Re: Dewalt transmissions

I also can give nothing but praise for the Dewalt transmissions with the CIM motors. Over the last 2 years that 1018 has used them, I don't recall any major problems with them. The only thing that I recall ever going wrong was the left hand screw on the end not being tight, but that has nothing to do with the transmission itself. Once the servos were programmed, shifting was very easy to do. This has been a very reliable drive train, and I would highly recommend it.

ERic
  #15   Spotlight this post!  
Unread 29-12-2006, 01:42
JagWire's Avatar
JagWire JagWire is offline
Team 1742 College Mentor
AKA: Tim Long
FRC #1742 (Shockwave)
Team Role: College Student
 
Join Date: Feb 2006
Rookie Year: 2006
Location: Oklahoma
Posts: 41
JagWire has a spectacular aura aboutJagWire has a spectacular aura about
Send a message via AIM to JagWire
Re: Dewalt transmissions

I also would have to chime in that the DeWalts are awesome. my team had a little trouble with machining the sun gear if i recall correctly, since they are rather hard, but we got it done. the only other issue we had was when we pressed the sun gear onto the CIM, on one of our motors we ended up pushing the shaft in the CIM and fractured the armature. not exactly a cheap mistake, but we lived.

once they were put together and everything was programed they were awesome. we were a rookie team last year, and, thanks to a lot of great expertise on board we didn't have a whole lot of trouble with them. i'm quite sure we'll be using them again this year also in all likelihood.
__________________
Team 1742: Shockwave
2006 Robot "Sprocket"
2007 Robot "Rampzilla"
2008 Robot "Trigonosaurus"

Aut viam inveniam aut faciam.
I'll either find a way or make one.

www.team1742.com
Closed Thread


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bosch vs. Dewalt David55 Technical Discussion 13 20-05-2006 09:52
Dewalt transmission problems? roach1051 Technical Discussion 10 11-04-2006 00:33
DeWalt Transmissions - XRP Drill source !! Stu Bloom Technical Discussion 2 13-01-2006 22:34
dewalt motor stats greencactus3 OCCRA Q&A 1 11-09-2004 09:40
Dewalt Transmissions Joe P Technical Discussion 9 09-09-2004 21:07


All times are GMT -5. The time now is 06:15.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi