Question for electrical engineers

[MFG_BOP]

Hello all. I am about to make an annealing machine based on this https://www.youtube.com/watch?v=0-C-i0Kr2jU and I am not sure what amperage for the power supply I should go for.
These are the components:
MOTOR: http://www.aliexpress.com/item/Diameter-32mm-12V-DC-25-RPM-Gear-Box-Speed-Control-Electric-Motor-Stabilivolt/1686942726.html
SPEED CONTROL: http://www.aliexpress.com/item/Free-Shipping-Hi-Q-Pulse-Width-PWM-DC-Motor-Speed-Regulator-Controller-Switch-6V-12V-24V/1773705054.html
POWER SUPPLY: http://www.aliexpress.com/item/EU-Plug-AC-100-240V-to-DC-12V-3A-Switching-Power-Supply-Converter-Adapter/2051090546.html
Will this combination match? If not, would you suggest any other combo? Any answer will be appreciated.
Regards
MFG

 

[tonysnoo]

I'm not an engineer...just been making a living working on electrical "stuff" for years.

Your power supply and your speed control both appear to be capable of comfortably handling up to 3 amps. The motor only draws 1/10th of an amp at full load. Your chosen components should run that tiny motor with lots of power to spare. I wonder if that motor has enough torque to do much work. Your power supply appears to be capable of running a lot bigger motor. It might pay to upsize a bit. Maybe something that draws 1 amp. That should still keep your power supply working at 1/3 potential. It might be a better match for the speed control too.

Also did you notice the power supply is not a standard US 110 configuration. If you're not in the US then it may be a mute point.

Good Luck and let us know how you did.

 

[itchyTF]

A few comments.

I also question whether that motor has enough guts to do what you want. The description of the power supply says EU plug so being from NZ that probably isn't an issue. The label on the PS states 3A but in the description below it states 2A. Is the picture of the real device? Is it a regulated or unregulated supply? Description doesn't say. If you upsize the motor, the supply is unregulated and the input filter cap on the speed control is not sufficient, the speed control may not behave correctly.

 

[DickE]

Here is an idea that I used to make mine. very similar design. I used a rotisserie motor from a outdoor Barbe-que. The one that you use to turn a chicken above the charcoal. Here in the USA its 110 volt but I bet you have the same things there. Works good. Just adjust the flame for right temperature, that's the only adjustment. Have fun!

 

[MFG_BOP]

Cool guys!!! Thanks for the reply Yes, I am in New Zealand and its 220V here. Lets see how it works together. Cheers!

 

[carlsbad]

I am a bit concerned about the size of the motor too. Not much torque there. I can't see the build thread because I dont have an account. I don't know if you're planning to use a geartrain or a friction drive. Either way, there will be some power requirement that is likely to go up as it gets older. Also, if a casing falls into position imperfectly and needs a bump, the motor may not have enough torque. Are you using bearings or bushings? Bushings will require more power. Any imperfection in the alignment of the gear train will cause a slight power change through the cycle which would cause the system to speed up and slow down if the motor is marginally sized. Just a few things to think about. If you're an expert machinst and plan to make everything perfectly with good bearings, then your power requirements will be less.

If you've got an old computer laying around the power supply out of it gives you lots of 12 volt power for free. Then you could upgrade the motor and speed controller a bit. I don't find those black box power supplies to be very reliable at higher currents and often overrated. The computer power supply would be heavier to put a little weight in the base giving it a solid feel.

One more thought, I'd build my electrical system before I designed the gears etc. You may expect it to run at one speed and it actually runs at another speed. If you know that upfront you can change the gearing to get the speed range you want.

-Jerry

 

[dkhunt14]

Doesn't the drums attach direct to motor shaft? Matt

 

[MFG_BOP]

Thanks guys for the inputs. I bought already the parts and lets see how they perform together. They were not expensive so its not a big deal. I can post the results. Cheers

 

[carlsbad]

Please post results. My advice was meant to improve your chances of problem free operation from the start. I'm not saying you'll have any of the problems I suggested and I'm not at all saying they won't work. good luck, Jerry

 

[MFG_BOP]

Tks carl. I didnt take that way. actually, i bought the parts before you wrote your comments. it was a good advise though bcs I am a loser regarding electric stuff
will post the results.
cheers