dewalt motor VS. CIM motor

[artdutra04]

Originally Posted by sparksandtabs

I have been looking around online but cannot find any specs on dewalt motors. I was thinking about using some dewalt motors with the XRP transmissions but didnt know what would be stronger.

Under the 2006 FRC rules, you could NOT use the DeWalt motors from the DeWalt XRP Transmissions on a FRC robot. You HAD to change them out for CIM/FP motors.

[John Gutmann]

I am aware of the rules, I am not using it for a FIRST robot, I never said it was.
It is for a personal projct of mine that i am working on.

[Andrew Blair]

The dewalts that were included with previous years kits, as I remember, were of a slightly higher wattage than the small CIM, somewhere in the 20-50 watt range. Its wattage was in the mid to high 300's.

As far as power goes, the drill has a bit more juice, but will experience greater wear and subsequent loss in power much quicker than the CIM motor, which has much greater mass and will absorb abuse better.

[Joe Johnson]

I have never seen a spec on the Dewalt motor that comes with the XRP drill, but my considered opinion is that it is close to a 400W motor which would make it a higher power motor than the CIMs.

Note that 400W is a theoretical number that is calculated as the power produced by the motor at the peak mechanical power output of the motor (loaded at 1/2 stall torque and therefor running at 1/2 its free speed).

As a practical matter, I think that that motor will not be able to sustain 400W without overheating. So while the motor may be theoretically a higher power motor than the CIM, I think that in many cases you can get more actual power out of a CIM (especially if your application is for high power over extended periods of time).

Calling 'em as I see 'em.

Joe J.

[Tristan Lall]

Originally Posted by Andrew Blair

The dewalts that were included with previous years kits, as I remember, were of a slightly higher wattage than the small CIM, somewhere in the 20-50 watt range. Its wattage was in the mid to high 300's.

The small CIM (FR801-001) is around 343 W at 12 V. You're thinking of the deprecated Bosch/Scintilla drill motor (2 607 022 078), which is 448 W at 12 V.

[John Gutmann]

Well basically what I am working on is a Robot that basically (for now) just drives around. I finally go my machine shop certifications at Clarkson now so I can make the parts I need. Right now I own a PBASIC control system and some victor 883's but I am also working on the creation of an AVR powered robot controller that can use WIFI for programming and communication. Hopefully it will be able to interface with most USB devices too.

[Gabe]

DeWalt motors are used sometimes in battlebots coupled with their transmissions. One source for these motors is the Robot Marketplace, where you can get many different voltages.
http://www.robotcombat.com/marketplace_dewalt.html
For more information on DeWalt motors look around for battlebot websites that may have undertaken the research on their own, and compare it to the motor specs provided by IFI.

[John Gutmann]

well I would not want to use those motors after the advice I just got. Battle bots aren't made to last along time. They are made to get the stuffing beat out of them. They seem like nice motors but i didnt think they would burn out fast

[Joe Johnson]

Originally Posted by sparksandtabs

well I would not want to use those motors after the advice I just got. Battle bots aren't made to last along time. They are made to get the stuffing beat out of them. They seem like nice motors but i didnt think they would burn out fast

I don't think the motors will burn out at all, to the contrary, I think the motors are great little work horses. I have used them often on prototype robots.

I am just saying that even though they may have a higher nominal power rating than the CIM's, the CIM's may be able to put out higher power in the long run if the motors are allowed to run long enough to get super hot.

Joe J.

[Andrewpbhs]

Originally Posted by Joe Johnson

I don't think the motors will burn out at all, to the contrary, I think the motors are great little work horses. I have used them often on prototype robots.

I am just saying that even though they may have a higher nominal power rating than the CIM's, the CIM's may be able to put out higher power in the long run if the motors are allowed to run long enough to get super hot.

Joe J.

that is why you make a cooling system to keep your motors at a resonable temp, being a OCer, and a Motorhead, i know what cooling can do. if you were to keep the Dewalt cool, it could easily out preform the CIM.

but im not downing the CIM, they can easily be modded to way out preform the Dewalts and need to have adiquate cooling.

[lynca]

I'm curious if the XRP gearbox mentioned in the Nothing But Dewalt (white paper) can be bought off the robot market place website ?

http://www.robotmarketplace.com/stor...gearboxes.html

I'm thinking they are the 3-speed gearboxes mentioned ,

Are there any other places to buy the Dewalt XRP gearboxes without buying the whole drill ?

[Joe Johnson]

Originally Posted by lynca

I'm curious if the XRP gearbox mentioned in the Nothing But Dewalt (white paper) can be bought off the robot market place website ?

http://www.robotmarketplace.com/stor...gearboxes.html

I'm thinking they are the 3-speed gearboxes mentioned ,

Are there any other places to buy the Dewalt XRP gearboxes without buying the whole drill ?

The parts are available at https://www.dewaltservicenet.com

Almost all XRP drill models share the same inside parts but the DC930KA works as good as any for our purposes. If one XRP drill model is out of housings, you can use another (just make sure it uses the same gearbox -- that is the heart of the matter).

If dewaltservicenet.com is out of the parts, try calling your local Dewalt service center. They have access to a stock of parts that is independent of the parts from dewaltservicenet.com I have had good luck finding parts locally if I was in a jam.

Also, know that in my experience, dewaltservicenet.com almost always seems to beat their posted backorder dates so if they are out of parts and claim they will not be in for a month, you may find that they are back in stock in two weeks.


Finally with regard to dewaltservicenet.com, you may have to register to get to see the parts lists but it is relatively easy.

Good luck.

Joe J.