Lock Gears Without Motor Power: Tips & Tricks

[andrewtirtawijaya]

SO, here is the case guys.
I have a mechanism to turn plate by a motor. Both motor and plate was connected through 2 spur gears.

But here is the problem,
when wind strike the plate, the plate start to rotate even without the power of the motor. What is the best way so i can prevent the plate to rotate when the motor in off condition? Is there any device to autolock the gear when the motor is off?

Thanks for the answer.. Have a good day :)

 

[jerromyjon]

I think this is usually done with a brake built into the motor.

 

[Dr.D]

You can replace the spur gear pair with a worm gear pair that will not back drive.

 

[CWatters]

Some ideas...

Try shorting out the motor rather than just turning it off.

Worm gear drive.

If on a budget perhaps try the PTO/blade clutch from an old ride on mower as they usually have a blade brake.

 

[Mech_Engineer]

Try shorting out the motor rather than just turning it off.

x2

Assuming speed and/or power dissipation are not a concern, shorting the pins on the motor together when power is disconnected will cause it to "electrically brake." This would be easily implemented with an appropriate relay or switch.

Some more reading here: http://electricalengineeringtutorials.com/dc-motor-braking-methods/

 

[andrewtirtawijaya]

I think this is usually done with a brake built into the motor.

Thanks dude for ur suggestion. I've decided to use worm gear at my mechanism ^^

 

[andrewtirtawijaya]

You can replace the spur gear pair with a worm gear pair that will not back drive.

Thanks a lot dude. With ur help I can realize my work. May God bless u :)

 

[andrewtirtawijaya]

x2

Assuming speed and/or power dissipation are not a concern, shorting the pins on the motor together when power is disconnected will cause it to "electrically brake." This would be easily implemented with an appropriate relay or switch.

Some more reading here: http://electricalengineeringtutorials.com/dc-motor-braking-methods/

Seems like a good idea, but I've decided to use worm gear at my mechanism. I will try to learn ur advise, maybe i'll need it in the future. Thanks :)

 

[andrewtirtawijaya]

Some ideas...

Try shorting out the motor rather than just turning it off.

Worm gear drive.

If on a budget perhaps try the PTO/blade clutch from an old ride on mower as they usually have a blade brake.

Your idea sounds great. But I've little knowledge on motor and electrical things. I'll try to learn it in the future. But thanks a lot for ur advice. For now I will use worm gear at my mechanism. Thanks a lot dude :)