I have a 3v DC motor, 1RPM - as soon as I add the load, of course, the RPM drops, about 8%. What specific hardware do I need to maintain exactly 1 RPM …? There’s a worm gear attached to the motor shaft, it drives a 60T gear that is attached to another shaft doing the work. Thanks for your suggestions …
It does help, thanks - but it seems like overkill for what started as a simple clock project. I realize that a manual DC/DC converter will require sitting there and “playing” until I get the motor at exactly 1 RPM, but wouldn’t that work …? Thanks again …
Great - so 2 x 9V batteries = 18VDC power source, your AnyVolt3, and my 3VDC 1 RPM motor would work, and maintain the 1 RPM even as the batteries deplete …? Do I need a digital speed controller …?
Thank you very much for your patience …
Would the $100 digital speed controller give me anything, assuming nothing else in the whole set up (i.e. no programming, no other controller like a joystick) …?
And 1 last question (I hope - I don’t want to take advantage of your patience too much more!) - is 2-day to California available for an AnyVolt and possibly the controller …?
Best –
Bob.
Hi LA-Bob,
Welcome to the RobotShop Forum. The easiest way would be to increase the supplied voltage slightly. If you want to change dynamically (without changing the mechanical setup), you’ll need an encoder to measure the rpm, a microcontroller to read and interpret that value, and a motor controller to adjust the voltage.
Hope this helps,
Hi LA-Bob,
Yes, as indicated, you can increase the voltage slightly (using an adjustable DC-DC converter if you’d like).
Sincerely,
Hi,
Not sure why you would need 18V input, but yes, the anyvolt should be able to provide a set voltage even as the battery depletes. You would not need a speed controller so long as you are ready to adjust the voltage regulator until you get what you want. The AnyVolt3 is quite powerful; if the motor current current is less than ~0.4A, consider the AnyVolt Micro.
Sincerely,
Hi,
You can use an analog voltage controlled (potentiometer-controlled) motor controller which would allow you to adjust the speed manually. This would allow you to operate the motor at its nominal voltage (i.e. more efficiently). To see which shipping options are available, please add the product to your cart on the RobotShop website and click “modify my cart”. You can then calculate the shipping options and rates automatically. If the options are not what you need, contact us via the Support Center and provide your user account, or if you don’t have a user account, then your complete tel# and address as well as the quantity and product codes you want to order and we’ll see if any other shipping methods are possible.
Sincerely,