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View Full Version : Anyone Recently modify DeWalts?

alb4h
19-12-2012, 09:06
I'd like to talk to a team that modified a DeWalt for use in FRC in the past one or two seasons.
Anybody?
AlexH
19-12-2012, 10:04
not quite for FIRST but there's been some recent designs for a dewalt 3 speed mount

http://www.etotheipiplusone.net/?p=2429
http://www.etotheipiplusone.net/?p=2438
http://www.etotheipiplusone.net/?p=2501
Richard Wallace
19-12-2012, 10:21
I did one. You can see it here (http://www.chiefdelphi.com/forums/showthread.php?t=101969).
Gary Dillard
19-12-2012, 10:36
Were DeWalt's legal motors for FRC last year? We used to get them in the KOP but that hasn't happened in several years.
IceStorm
19-12-2012, 10:44
I did one. You can see it here (http://www.chiefdelphi.com/forums/showthread.php?t=101969).

Don't suppose that you have any pictures or steps of the process laying around that you could share with the community?
chadr03
19-12-2012, 11:03
CRyptonite 624 used to have a good step by step instruction on their webpage. I don’t see it anymore, but you might try to send an inquiry their way to see if they still have it saved somewhere.

http://www.team624.org/
Richard Wallace
19-12-2012, 11:20
Don't suppose that you have any pictures or steps of the process laying around that you could share with the community?Not laying around, but I can get some this evening when the team meets. They used it on the 2012 robot, to power the bridge arm harvester. The motor is one of the KoP 775s. which fits nicely in the DeWalt case and required only a very simple adapter plate. We re-used the stock pinion from the drill, which was a perfect press fit for the 775 shaft.

Will post some pictures when I have them.

EDIT: Never mind, see Andrew's post#11 a little further down -- Killer Bees have this one covered quite well. They iterated a few times and got a much more elegant solution.
billbo911
19-12-2012, 11:27
Don't suppose that you have any pictures or steps of the process laying around that you could share with the community?

Here's the original (http://www.chiefdelphi.com/media/papers/1592) step by step.
Lil' Lavery
19-12-2012, 15:12
Were DeWalt's legal motors for FRC last year? We used to get them in the KOP but that hasn't happened in several years.

I believe he is referring to the transmissions from a DeWalt XRP drill, not the actual drill motors themselves.
Tristan Lall
19-12-2012, 15:23
Were DeWalt's legal motors for FRC last year? We used to get them in the KOP but that hasn't happened in several years.
I believe he is referring to the transmissions from a DeWalt XRP drill, not the actual drill motors themselves.
We never got DeWalt XRP motors or transmissions in any KOP.

In 2003 and 2004 we did get the similar-looking Bosch/Scintilla drill motor (2 607 022 078) and its transmission.

More recently, we were able to use various BaneBots' RS-775 motors, which might be drop-in replacements for some DeWalt XRP motors.
apalrd
19-12-2012, 15:36
We found that the stock Dewalt pinion fits nicely on a 775 motor.

We initially designed our stinger to be powered by a 775 in dewalt XRP transmission. We simply modified the motor mounting to attach the 775, and moved the pinion. We designed a mounting assembly out of plastic to avoid any case-short issues since we were using other 775 motors on the robot.

It proved too heavy to use, at around 3 pounds for the drill trans, motor, mounting bracket, and winch shaft assembly. We later found a Milwaukee drill with stock 550-sized motor, which required us to only change the pinion on a legal motor (the mounting face pattern and shaft size were the same on the stock drill). The entire stinger assembly (motor, mounting bracket, winch, thinwall tube 4-bar and stinger with wheel at the end) weighed somewhere around 4 pounds, and was by far the most weight-effective non-drivetrain mechanism on our robot.

We later found a Bosch drill that required the same modifications and was even lighter. We had the Milwaukee on the robot at ship, and left it through the season, but helped team 2834 modify two Bosch drills for a bridge mechanism they build during the competition season, since we had better tooling to swap the pinions.

<EDIT> IKE posted a paper about the two drills here (http://www.chiefdelphi.com/media/papers/2651) </EDIT>

We also did a 'normal' CIM modification (shifter and all) for our 2010 robot's arm. We taped a 15t or so (it was +-1t of 15t) 20dp pinion for the 1/2" thread of the Dewalt, and inserted the dewalt into an AndyMark toughbox. We bolted a large split shaft collar to the AM toughbox motor mount plate. You can see it in this picture (http://www.chiefdelphi.com/media/photos/34788). The pic dosen't include the shifter, we added it later. We then ran one of the sprockets (I can't remember if we used the 9 or 12 tooth) to a large VEXpro sprocket (72t?) on the arm.
Gary Dillard
19-12-2012, 15:58
We never got DeWalt XRP motors or transmissions in any KOP.

In 2003 and 2004 we did get the similar-looking Bosch/Scintilla drill motor (2 607 022 078) and its transmission.

More recently, we were able to use various BaneBots' RS-775 motors, which might be drop-in replacements for some DeWalt XRP motors.

That's right, thanks Tristan. I remembered the Bosch Drills we used to cut up and Joe's NBD threads and got them confused.
billbo911
19-12-2012, 16:06
In 2009 we used a FP motor powered Dewalt XRP to power our turret mounted Moon Rock shooter.

http://billbo911.smugmug.com/Hobbies/2009/i-sVt8LJX/0/XL/_MG_7109-L.jpg

Then in 2010 we again used a FP motor powered Dewalt XRP to power our "Ball Sucker". I don't have any really good shots of it, but it's in there. ;)

http://billbo911.smugmug.com/Other/2010/i-TF3XP2H/0/XL/_MG_8843-L.jpg