Motor without gearbox

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Anonymous
Motor without gearbox 2017-09-10 08:21:19 Post No. 1241968
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Motor without gearbox Anonymous 2017-09-10 08:21:19 Post No. 1241968 [Report]

Is there anything to worry about when using a DC motor to drive a load directly, without any sort of gearbox? I'm making a POV display type contraption. The motor runs at 12V and draws ~3A, which is well under the motor's maximum current draw. Although I notice the wires are getting warm (especially the thin ones).

Will this damage the motor? I haven't noticed the casing get warm, yet. Since the current draw is well within what it's rated for, it shouldn't be dangerous, no?

Anonymous 2017-09-10 10:40:02 Post No.1241991
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Anonymous 2017-09-10 10:40:02 Post No.1241991 [Report]

>>1241968
>The motor runs at 12V and draws ~3A, which is well under the motor's maximum current draw

It appears that you have confused "maximum" with "nominal"

Your motor will burn out. Kill yourself now.

Anonymous 2017-09-10 10:44:05 Post No.1241995
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>>1241991
Maybe I quoted the datasheet wrong. It says the "maximum efficiency" current is 4.5A, and I'm drawing ~3.

Anonymous 2017-09-10 10:48:59 Post No.1241997
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Anonymous 2017-09-10 10:48:59 Post No.1241997 [Report]

>>1241995
Link to the motor you are using.

kys still recommended as a solution.

Anonymous 2017-09-10 11:03:14 Post No.1242007
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Anonymous 2017-09-10 11:03:14 Post No.1242007 [Report]

>>1241997
Here you are, my dude
https://www.jaycar.com.au/12v-8-100-rpm-dc-electric-motor/p/YM2716

Anonymous 2017-09-10 11:24:17 Post No.1242016
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Anonymous 2017-09-10 11:24:17 Post No.1242016 [Report]

>>1242007
>>1241995
These two don't match. For the first 3A draw is OK, for the last, it isn't.

Anonymous 2017-09-10 11:26:45 Post No.1242017
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Anonymous 2017-09-10 11:26:45 Post No.1242017 [Report]

>>1242016
Also may I suggest using a brushless motor motor or an async AC motor. A POV display needs to make bum bum for long time, which a brushed motor is not really suited for.

Muh reliability. Also kys.

Anonymous 2017-09-10 11:29:23 Post No.1242019
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Anonymous 2017-09-10 11:29:23 Post No.1242019 [Report]

>>1242017
>A POV display needs to make bum bum for long time, which a brushed motor is not really suited for.

How long is OP going to run it? Brushed motors last many hours. Maybe OP is just going to use it on occasion.

And the "kys" is getting old, son.

Anonymous 2017-09-10 11:34:06 Post No.1242020
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Anonymous 2017-09-10 11:34:06 Post No.1242020 [Report]

>>1242019
>not engineering your products to last for a thousand years and then having aesthetic ruin value after that

kys

Anonymous 2017-09-10 01:38:02 Post No.1242068
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Anonymous 2017-09-10 01:38:02 Post No.1242068 [Report]

>>1241968
little gearbox reduction dc motors are cheap as fuck

http://www.ebay.com/itm/DC-6V-30RPM-Torque-Geared-Gearbox-Gear-Box-Micro-Electric-Motor-Silver-Model-/131561086759?hash=item1ea1a6df27:g:B-wAAOSwfVpYo~EY

Anonymous 2017-09-10 02:41:33 Post No.1242093
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Anonymous 2017-09-10 02:41:33 Post No.1242093 [Report]

>>1241995
Stall current is 18A. If you never go over 3A then you have nothing to ever worry about. You can go as high as 5-8A and probably not worry. Basically, you need to find out how many amps the motor is drawing under its worst load for the specific application you are using it. If it is within a good limit then go for it. If it is nearly stalling the motor then there's a problem and you need gearing for better torque applications.

Don't mind the faggots ITT, they don't know what you're referring to.

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible. Read more on this topic here - https://archived.moe/talk/thread/1694/

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/