usage of denso window motor

[dexo568]

Where can we buy a sprocket that will work with the window motor coupler? OR, can someone explain other possible ways to connect the window motor with the drive chain?

Thanks, Team 3328

[ttldomination]

Originally Posted by dexo568

Where can we buy a sprocket that will work with the window motor coupler? OR, can someone explain other possible ways to connect the window motor with the drive chain?

Thanks, Team 3328

What my team has done is taken the cone shaped outside part of the coupler and ground away some of the material. This allows a 1.125" sprocket to slide in there nice and snug. Screw in the sprocket and you're set.

Also, the output shaft is a 8mm key shaft. You can purchase this shaft from AM or another provider and use the 8mm key AM hub found here, and attach a sprocket to that.

Hope that helps,
Sunny

[DonRotolo]

In years past we have also cut off the cone part and bolted a metal plate to the wide flange of the adapter, and run stuff off that.

Just remember that the plastic, although strong, has its limits. Have spares available and make them easy enough to replace!

[vincentkee]

Does anyone have experience with putting two or more Denso motors to power the same shaft?

From what I heard, the Denso motors have a worm gear and are thus cannot backdrive. If you use more than one Denso motor on a shaft, since all motors vary in speeds and the Denso cannot backdrive, will the Densos end up twisting the shaft?

Thanks

[KHall]

Does anyone have experience with putting two or more Denso motors to power the same shaft?

Yes, we did something like that last year. We used two motors on a single shaft to form a winch that wound our kicker's spring. Worked fine.

If there was any difference in speeds, well, we let the motors work that out. The winch lasted all season and we never had issues with it.

We used spikes to drive the motors. I can't recall if we were able to use a PWM splitter cable or if (spin) direction differences caused us to need two separate PWM ports. But its probably a good idea to work out which way everything turns before you assemble it. We did blow the fuses in the spikes a couple times when the kicker locked up, but the winch just kept working.


Keith Hall
Mentor 2171

[Stephen of REX]

Window motors can run backwards as well as forwards. Last year we had four window motors working in tandem to winch the robot up onto the tower. Just make sure to always run them at the same speed.

[Creator Mat]

Originally Posted by dexo568

Where can we buy a sprocket that will work with the window motor coupler? OR, can someone explain other possible ways to connect the window motor with the drive chain?

Thanks, Team 3328

What we did to attach the coupler with the was pin it to the window motor using a cotter pin. It stayed pretty well and we never had any problems with it

[artdutra04]

If you have access to CNC machines (through your shop or via sponsors), you can machine your own sprockets. The Denso motors also do not like cantilevered loads, so you should always support the shaft with another bearing/bushing. Here's some 7075 aluminum sprockets with a Denso hub pattern that I machined last year for 228.




The Denso motor, sprocket, and shaft support (with Delrin bushing).

[Lowfategg]

We turned down the included KOP hub and machined the inside to press fit a bearing that would fit over the fixed metal idler shaft on the motor (I think it was 5/16"). I drilled and tapped the end of the shaft on the motor (your allowed to modify the output shafts on motors <R47>), and held it all together with a number #10 screw and washer. You can just bolt whatever you like to the modified KOP hub. Just be careful with side loads because the metal shaft on the motor is not well supported.

We used this on our ball pinching system last year with V-belts. It was a low torque application and it never failed.

[Gdeaver]

We took a 3/4" sprocket and epoxied it onto the motor. Had to ream out the sprocket hub a little. If your varying the speed of the window motor you should use a victor speed controller not a jag. If you experience random lock up remove the locking pins.

[ttldomination]

Turns out that the output shaft of the couplers that come with the kit are not 8 mm like the Andy Mark hubs, but instead, they are about 16 mm, or about .63". Would it be wise to take a .625" AM hub and sand out the inside a bit to make it fit on the shaft?

[Team 3355 Ment]

Originally Posted by Creator Mat

What we did to attach the coupler with the was pin it to the window motor using a cotter pin. It stayed pretty well and we never had any problems with it

Would you happen to have a picture of your set up?

[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!