12VDC Geared Motor Battery Advice
- Thread starter Reedswood
- Start date
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No, meaning a 12V battery.
A car battery may well power it for longer than you would ever need, but so what?
However - "little motor" - are you sure it's going to be any use whatsoever to drive a spit?
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For what is the motor designed to be used?
I've used something similar to power an automatic chicken house door. It pulls about 1 kg using pulleys and is OK, but caveats are:
it only works for a few seconds twice a day
when installing it jammed and got very hot very quickly
If I rebuild, I'll use a bigger motor.
it only works for a few seconds twice a day
when installing it jammed and got very hot very quickly
If I rebuild, I'll use a bigger motor.
Knowing the weight ( or more accurately the mass ) is not enough, you need to know the torque, the turning power of the motor.
Almost any one can lift a 1 kg mass when it is in their hand.
But very few could lift it if it was at the end of one metre long horizontal rod they were holding at the end furthest from the mass.
When the mass is in their hand it creates no torque ( twisting force ) on the wrist. At the end of a lever ( the rod ) it creates a torque. The longer the rod the higher the torque from the same mass.
So in this case what's needed is an assumption of the maximum weight of the item(s) on the spit, and the maximum distance that its centre of gravity will be from the axis.
And there's the moment of inertia to consider - a motor might be able to keep something turning, but not to accelerate it from rest.
If "an electric oven it appears" means it's meant to power a rotisserie then it's probably going to be fine, subject to any heat shielding, ensuring the shaft is aligned, the whole structure is rigid, etc.
If it's a fan motor things will be different
And there's the moment of inertia to consider - a motor might be able to keep something turning, but not to accelerate it from rest.
If "an electric oven it appears" means it's meant to power a rotisserie then it's probably going to be fine, subject to any heat shielding, ensuring the shaft is aligned, the whole structure is rigid, etc.
If it's a fan motor things will be different
Indeed. However, as I said early in this thread, although my guts have been known to be wrong, my gut feeling is that this motor is so physically small that I would be very doubtful as to whether it was man enough for the (rotisserie/spit) job.If "an electric oven it appears" means it's meant to power a rotisserie then it's probably going to be fine, subject to any heat shielding, ensuring the shaft is aligned, the whole structure is rigid, etc.... If it's a fan motor things will be different
Kind Regards, John
I do wonder why a motor meant to drive a rotisserie in an electric oven would be a 12V one...
I would post a link to the actual item I bought, but I think it may be against Forum Rules, but googling this "Wired 6mm Shaft Diameter Electric Oven Geared Motor 12VDC 8RPM" will take you to it on fleabay!
Is 8RPM good enough for turning?
Is 8RPM good enough for turning?
If you're refering to the one sold by "sellerbible" from Hong Kong, then this..
... does not bode very well, because those are mainly very low power/torque applications. It's pretty odd that they don't mention the power, torque or electrical consumption of the motor!
Kind Regards, John
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