White Paper Discuss: Nothing But Dewalts

[ctorloey]

I was wondering how the dewalts worked on the programing side of things? having the robots switch speeds during the matches, was that complicated for the programmers to solve? Or was it easy to program.

[Phalanx]

I've read over the white paper and the various other threads on the subject with regards to slight modifications. What I hadn't noticed was if anyone had come up with a design or modification to allow these excellent transmissions to work with the Mini Bike (aka large) CIM.

If so, I'd like to hear more about it or discuss it.
It's something that might be worth pursuing.

Thanks

[Josh Murphy]

Phalanx,

Yes we converted the big cim last year when the season was over, we built two of them and put them on a chassis.They were really slow. They would be good for an arm but they are really heavy. I would not use these motors in the DeWalt form, I guess I would not trust them, just my opinion.

[meaubry]

As Josh indicated - without attempting to modify the gearing in the dewalt - the big CIM ran pretty slow. Unless the application was appropriate, I wouldn't use them.
If they were adapted to the proper gear box they could work as well as the other size CIM. Although, it might be easier to drive through an external gear box, to get what you need out of them.
So, if you wanted a big heavy motor that would work all day long, without over heating - and you had the weight available - the big CIM's could probably be adapted.

[AdamHeard]

Originally Posted by meaubry

As Josh indicated - without attempting to modify the gearing in the dewalt - the big CIM ran pretty slow. Unless the application was appropriate, I wouldn't use them.
If they were adapted to the proper gear box they could work as well as the other size CIM. Although, it might be easier to drive through an external gear box, to get what you need out of them.
So, if you wanted a big heavy motor that would work all day long, without over heating - and you had the weight available - the big CIM's could probably be adapted.

Team 33 used A big CIM with a dewalt for drive in 2006. Iirc, it worked out pretty well.

[Phalanx]

I should have put this in my previous post, but alas hindsight is always 20/20.

I never had any intention of using the Dewalt transmission with the BIG CIM for a base drive. The thought was as others have pointed out, that perhaps it would be suitable for an arm or turret etc...

Odd are it might be, but it may not be worth it, there might be better choices.

Thanks for the feedback and exploring my thoughts.

[FTtyler]

I have a couple quick Questions.

Has anyone had problems removing the chuck off the end of the drill?
And How did you end up getting it off?

We are having problems with it and we need some help!

[Richard Wallace]

Yes, we had trouble. Ended up using heat and impulsive force; i.e., torch, punch, and hammer. That loosened the (left) threads so we could get the chuck off. The trick is using just enough heat and impulsive force to get the job done, and not enough to break things. We had a very experienced tech-ed teacher lead the students through the exercise.

[Tapoore]

There is screw that must be undone that is inside the chuck. I believe that it is reverse threaded. To get the rest of the chuck off, we used a socket wrench with a long lever attached to it. To interface the wrench with the chuck we used a hex adapter (something that fits in the socket and is hex-shaped at the other end). The adapter also needs to fit into the chuck. Tighten the chuck around the adapter and use the wrench to carefully unscrew the chuck.
Hope that wasn't too confusing...

[Mike Martus]

It is easier and cheaper to order individual parts as per the NBD White Papers.

Dewalt has a great website http://www.dewaltservicenet.com

And YES they can be shifted with a simple servo.

[FTtyler]

Thanks For the help guys.

Does anyone else have some more ideas?

[grantman54]

Hey my team is very interested in NBD. Last year we used the Andy Mark 2 speeds trannys for the drive train. They just didn't seem to be worth the weight and cost. My questions are:

• How reliable is "shifting on the fly"? Anyone have major failures?
• Is it unreliable because of servos not acting at the same time or just the characteristics of the NBD?
• IF it is the servos, would replacing them with pneumatics fix this? Seems to me like it would. anyone tried?
• Would using two CIMs to one Dewalt transmission be too much for the Dewalt? Is an extra CIM even worth it? (drivetrain)

(Pics are always helpful )

Thanx,
Grant

[EricRobodox]

To answer above, it was fairly reliable last year, with no major failures. The unreliable part was piano wire was very hard to work with and we ended up using a ball link. We decided not to shift to all 3, just using 2, as the servo did not have enough power alone. Pneumatics can be used, just may be harder to integrate. We used the extra CIM, and our friends, 1070, did not.
They had an effective time I think with the NBD setup, and so did we. Definitely hard to create an adapter mid-season without instructions to fit 2 CIMs into the NBD, but the BaneBot 2 CIM adapter helped. Mounting also was a difficulte problem to solve mid-season. Planning ahead can help reduce the stress if you guys go with 2CIMs into one DeWalt.

I have a question....

The newer model DC940 is now out, and its hard to find the model that the NBD was made for (DC980KA). Does anyone have the specs or a CAD of the new DeWalt drill tranny?

[Richard McClellan]

Originally Posted by EricRobodox

The newer model DC940 is now out, and its hard to find the model that the NBD was made for (DC980KA). Does anyone have the specs or a CAD of the new DeWalt drill tranny?

Does anyone know of a place to find the DC980KA anymore?

[Kevin Sevcik]

Richard,

If you're just looking for parts for a NDB transmission, go here: http://www.dewaltservicenet.com/