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Unread 02-02-2011, 18:09
Brandon_L Brandon_L is offline
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Window motor to toughbox?

We need some sort of motor/gearing system to lift our arm. Today we tried the fisher price with the gearbox, and it worked wonderfully except it doesn't stay put when you take the power off it, as in it can be forced to turn. So we want to try to attach two window motors into a toughbox that we used last year in our winch that pulled us up the tower.

Does anyone have any ways/suggestions to get the window motors to work with the thoughboxes? One suggestion we had was to take a hacksaw to the plastic on the shaft so you just have the bare metal. But then how does that attach to a gear?
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Unread 02-02-2011, 18:33
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Re: Window motor to toughbox?

Carefull with your hacksaw. The last time I took a close look at the window motors that shaft does not turn.
Bruce
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Unread 02-02-2011, 19:48
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Re: Window motor to toughbox?

we just chain drive a sprocket and get the gear ratio that we need by using different size sprockets. We sometimes have to use a second set of sprockets to step it down to the desired speed
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Unread 02-02-2011, 19:57
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Re: Window motor to toughbox?

sprocket between two adapters would be the simplest.
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Unread 02-02-2011, 20:34
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Re: Window motor to toughbox?

most toughbox gearsets are very slow, however, with the KOP box this year, it provides 18 ft-lbs, and rotates 90 deg in ~1 sec
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Unread 02-02-2011, 20:48
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Re: Window motor to toughbox?

Quote:
Originally Posted by Dad1279 View Post
sprocket between two adapters would be the simplest.
Could you explain this? What adapters?
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Unread 02-02-2011, 21:06
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Re: Window motor to toughbox?

Sorry for the double, but my main reason for wanting to use a window motor is because they don't backdrive

if there was another way we could stop motors from doing this, such as FP through the FP gearbox, that would be amazing...
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Unread 02-02-2011, 21:21
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Re: Window motor to toughbox?

Quote:
Originally Posted by Brandon_L View Post
Could you explain this? What adapters?
From the KOP, Top of page 15, part # Denso-6 : Coupler, Denso motor, black, injection molded plastic, 6 tooth
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Unread 02-02-2011, 21:42
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Re: Window motor to toughbox?

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Originally Posted by Brandon_L View Post
Could you explain this? What adapters?
The motor adapters are for interfacing with the plastic output of the motors. They are black plastic disks with conical protrusions extending from one face and have a center bore that accepts a keyed shaft on the cone and a bolt circle on the disk.
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Unread 02-02-2011, 21:43
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Re: Window motor to toughbox?

Quote:
Originally Posted by Dad1279 View Post
From the KOP, Top of page 15, part # Denso-6 : Coupler, Denso motor, black, injection molded plastic, 6 tooth
take what he suggested, put a keyed bar between the 2 adapters to hold it snug.. and put a sprocket on the bar somewhere. That's what were doing for some max lift power.
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Unread 02-02-2011, 22:03
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Re: Window motor to toughbox?

We've attached a window motor to a CIMplebox for our arm, but we had to machine a keyed adapter shaft to go from the plastic window motor adapter to the small gear. It seems to be working quite well so far; the gear reduction produces an ideal rate of rotation and sufficient torque to lift our manipulator.

A chain-based system would work, but you still have to find a way to attach the sprocket to a gear. The KOP sprockets are just too narrow to fit over the adapter without modification.

Either system would require a lot of structural support, since the window motor adapter isn't firmly attached to the motor axle. Bearings on the axle are also a good idea, to prevent cantilevering.

Also, the metal shaft doesn't rotate, so cutting away the toothed plastic bit won't do you any good.
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Unread 02-02-2011, 22:05
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Re: Window motor to toughbox?

why dont use use code to put enough voltage on the fp to hold it in place, you'll have to fumble with the values a little bit to get it right, but its worked for us (offseason project). We did it with a cim on a toughbox though.
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Unread 02-02-2011, 23:28
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Re: Window motor to toughbox?

Quote:
Originally Posted by samir13k View Post
why dont use use code to put enough voltage on the fp to hold it in place, you'll have to fumble with the values a little bit to get it right, but its worked for us (offseason project). We did it with a cim on a toughbox though.
Couldn't you easily cook the motor if it needed a significant amount of torque to hold up?
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Unread 02-02-2011, 23:47
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Re: Window motor to toughbox?

Quote:
Originally Posted by Brandon_L View Post
Sorry for the double, but my main reason for wanting to use a window motor is because they don't backdrive

if there was another way we could stop motors from doing this, such as FP through the FP gearbox, that would be amazing...
You could use the FP(or a Banebots motor, if you were so inclined) through a gearbox to turn a worm that turned a worm gear, essentially making a big window motor.

Last edited by rutzman : 02-02-2011 at 23:48. Reason: more info
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Unread 03-02-2011, 00:03
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Re: Window motor to toughbox?

I don't recommend you put a window motor in a toughbox for one reason. A window motor in a toughbox would be SLOW. Window motors have a free speed of 84RPM (already pretty slow) by themselves and gearing that down to the 12.75:1 gear ratio of a standard Toughbox would give you a free speed of 6.6 RPM and a speed of 3.1 RPM at nominal torque.

Why don't you just use the window motors by themselves instead? In the KOP you got adapters for the window motors so you can attach the motors directly to a 5/8" shaft. Plus window motors have more than enough power by themselves to move just about anything you can ask them to. Just make sure you don't cantilever the shaft

Also you don't need a gearbox for the window motors because they already have one. The metal silvery thing sticking out the side of the window motor is a motor and the black part is the gear box which houses the worm gear (the reason window motors won't back drive). Before you get any ideas no you can't modify the window motor by separating the gearbox from the motor like you can with the Fischer price motors. The gear box is considered to be intergal to the motor which means you modify the gear box you modify the motor, which is against the rules. If you want a more explanation of window motor modification see this thread
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Last edited by Creator Mat : 03-02-2011 at 02:58. Reason: wrong window motor shaft size
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