usage of denso window motor

[heathput]

How much are we allowed to modify the window motors/gearbox? Can we use the gearbox for another motor?

[NyCityKId]

Originally Posted by heathput

How much are we allowed to modify the window motors/gearbox? Can we use the gearbox for another motor?

reference rule <R47>

[mathking]

We had success taking off the star pattern hub on the Denso shaft, using a lathe to bore out a hole in a 5/8" shaft and then "pinning" the 5/8ths shaft to the Denso shaft by drilling a hole and using a screw. I will see if I can find that setup tomorrow and take a picture. But if you have the machining capabilities sprockets like artdutra04's seem like a good way to go. Very nice!

[cilginbilgin]

Hello can anyone suggest us to use window motors without using gears

[PAR_WIG1350]

Originally Posted by cilginbilgin

Hello can anyone suggest us to use window motors without using gears

I'm sure many people (myself included) would be more than happy to help, but the question seems a little unclear.

If you want to remove the stock gearbox from the window motor in order to use the motor, this would be illegal since it is integral to the motor <R47>.

If you want to use the window motors with the stock gearbox and nothing additional, this would be fine, all you would need to do is mount the mechanism to the adapters provided in the kit. The only thing you would need to worry about is stripping the teeth of the gears.

If neither of these two answers match the question, rewording the question might help.

[eedoga]

If your still interested check out this photo gallery. We cut two plates using aluminum, and then got spacers to put in between them We drilled holes in the black plastic thing, and bolted a gear to that. We then put the top plate on holding the plastic thing in place.

http://forums.trossenrobotics.com/ga...age.php?i=3734




I included an STP file as an attachment.

Edoga
2980

[kinghashbrown]

In the past my team has made stepper shafts that are right OD for the KOP window motor adapter and then are turned down on a lathe to .5, then we ether had one of our sponsors key the shaft or we did it on a bridgeport at our shop.

it has worked well for us in the past. but you do want to support the other end of your shaft and the KOP adapters have broken on us before so spares were always good to have.

[heathput]

Originally Posted by NyCityKId

reference rule <R47>

Rule <R47> talks about modifications to motors. If I understand the rule, I can remove the motor, leaving the gearbox. Then I can mount a different legal KOP motor to the gearbox. It would require an adapter, but would be legal. Does anyone think I am off base?

[NyCityKId]

Originally Posted by heathput

Rule <R47> talks about modifications to motors. If I understand the rule, I can remove the motor, leaving the gearbox. Then I can mount a different legal KOP motor to the gearbox. It would require an adapter, but would be legal. Does anyone think I am off base?

As long as the motors you plan to use are in accordance with rules <R45> and <R46>, it should be OK as far as I know, but I don't really see why you would want to. Furthermore, I wouldn't want to be the one to have to figure out how to securely attach a bane bots motor to a window motor gearbox.

[heathput]

Think about it. The window motor gearbox is small and has mounting holes so it is easy to mount. The motor is pretty wimpy though. A 775 banebot turns only slightly faster, but has a much higher stall torque. By my calculations the window motor on the gearbox can produce about 90 inch pounds of torque at stall. With the banebot on the gearbox the number is a little more than 300 at stall. I do not think the plastic gears will hold up to 300, but I can run the motor at less than half the stall and still lift a boat load.

[Vikesrock]

I believe in past years the Window Motor gearboxes have been ruled to be integral to the motor and covered by the equivalent of <R47>.

If you want to use the gearbox with a different motor I highly recommend posting to the Q&A for clarification. I think it would be legal to use the gearbox with a different motor, but not the motor with a different gearbox.

[NyCityKId]

Originally Posted by heathput

Think about it. The window motor gearbox is small and has mounting holes so it is easy to mount. The motor is pretty wimpy though. A 775 banebot turns only slightly faster, but has a much higher stall torque. By my calculations the window motor on the gearbox can produce about 90 inch pounds of torque at stall. With the banebot on the gearbox the number is a little more than 300 at stall. I do not think the plastic gears will hold up to 300, but I can run the motor at less than half the stall and still lift a boat load.

Well if your numbers are correct then I can see why you would want to switch. I personally feel that you might be taking the difficult route by trying to switch motors since there are other ways to increase torque other than switching motors. However since I don't know how you plan to use the motors I cant say whether your going overboard or not. In any case, like Vikesrock said, the best place to post a question like this the Official Q&A forum.

If you don't mind though I would love to see how the motor swap turns out though, assuming the GDC says its OK.

[heathput]

I am going to try the swap anyway and see what happens. I will let you know how it goes.

[ratdude747]

good luck. in the past two years i have been on two teams that tried it... the motor has the worm molded into the the motor's shaft. you would have to either fashion the shaft into a press-on for the motor or machine a new piece.

i would not mess with it, just me $0.02.

[JRysenga]

Originally Posted by NyCityKId

reference rule <R47>

We have been debating the same question... Can we use the worm gear transmission only? If you remove everything related to the motor (armature, brushes, wires, etc.) you are left with a nice input shaft to drive the worm gears. Why couldn't we use another (un modified) motor to drive this transmissioin? R47 talks about "modifying" motors. We demolished the denso motor and threw it away! R47 also states, "The intent of this rule is to maintain the maximum power level for each ROBOT" We didn't change the maximum power level since we plan to use another (legal) motor from the kit to drive the worm gears. Think we would pass inspection?