Thread: electric motor/ single speed/ 600 -800 revs

Okay,

Thank you for clearing all that up.

Yes .18kw seems over the top now.

But, how do I control the speed on the dc motors? I need to be able to set it and walk away. Then come back and set it at another speed and walk away etc. (The dials on VFD would be good for this.)
Could I simply use this?

http://www.banggood.com/PWM-DC-Motor...FVEIvAodXpIALg

or this

http://www.ebay.com.au/itm/FAN-SPEED...83ec009&_uhb=1

And does that power converter mean I can simply plug it into the powerpoint?

I am not sure that I can mount a frame to this motor.

The frame itself will be 30cm x 40cm chequerplate square that I want to mount directly to the motor shaft. This is what the canvas would sit on.

Any ideas on that?

Thanks very much.

Ben

( Just when I thought I had it all sorted out! haha)

Mmmm - you might have to re-read my previous posts.
The banggood speed controller is fine with a 24V DC motor. But why? The Oatley motor comes with the speed controller?
The second one is for 240V AC appliances - so it would blow up the 24V motor. You woould be better off to stick with the speed controller I recommended to buy WITH the motor.
You DO need a suitable 24VDC powersupply which connects to the powerpoint (240VAC and converts that to 24V DC - you need at least 4A current output, because 24V x 4A = 96W).
The Banggod speed controller and the one I recommended are both set and walk away and you change them by turning a dial..... Oh. I just noticed the Oatley speed controller needs a potentiometer and a resistor in addition to set the speed. Your electrical friend can connect that - as can you, since it comes with instructions - or we can help you by 'remote control'.

Mounting the platter is a matter of making or having made a flange with the right inside diameter and some mouting holes for the platter and a grub screw to hold it to the shaft. The motor has 4 threaded holes in the end plates to bolt it to a support frame or plate. Like you woould have to do for any motor you might choose.

Originally Posted by jhovel

. . .Mounting the platter is a matter of making or having made a flange with the right inside diameter and some mouting holes for the platter and a grub screw to hold it to the shaft. The motor has 4 threaded holes in the end plates to bolt it to a support frame or plate. Like you woould have to do for any motor you might choose.

To mount the platter on the motor will require the assistance of someone with a metal work lathe.
I note that you want to use a 40 x 30 cm platter - this will make it harder to balance than if it is circular.
If it is not balanced it will wobble the motor and art work like a feral supermarket trolley wheel and could even be dangerous.

The way I would do it is to get the flange turned up or fabricated with an alignment collar on the outside. Drill a hole on the platter to suit the alignment hole on the flange and then and attach the platter to the flange with screws. Once the platter is attached put the flange back into the metal work lathe and turn the platter circular with the lathe. That way it will be very close to being balanced.
This is how I make larger diameter pulleys and it seems to work well.

Hi again,

I just wanted to give you all an update on the spin machines.

I have completed several machines now and they work fantastic.

I went with the .18kw electric motor and the VFD and am very happy I did so.

The units all have heavy duty switches etc and run very smoothly.

As the .18kw motors are quite large it made it easy to mount a plate. The 11mm spindle takes a pulley, and then a plate is simply screwed to the pulley.

The DC motors sounded fine but the amount of wiring was starting to add up with all the bits you need etc. If I had the confidence to wire all that up myself i suppose I could have done it, but then there were insurance issues as I will be using these with the public.

In any case, they run from zero rpm's all the way up to top speed with the simple turn of a dial.

Can anybody tell me how much current these draw? Is it simply a maximum of 180 watts? (.18kw) depending on load etc?

If anybody wants photos of the finished product send me your email and I will send you some. They boxes all came up quite nice.

Ben

Good to hear it's working out.
Please post some pics of the art here.

180W will be a nominal max load power.
If the motor is just spinning chances are it will be using MUCH less than this.

Originally Posted by BobL

Good to hear it's working out.
Please post some pics of the art here.

180W will be a nominal max load power.
If the motor is just spinning chances are it will be using MUCH less than this.

hi

Dont know if the photos worked.
Couldnt really work out the photo manager etc

ben