180v motor not working on new control board

[SillyOldDufferModerator @sillyoldduffer]

Posted by Andrew Cressey on 15/01/2022 12:15:36:

I have just connected the motor to a drill battery the motor runs but clunks as it goes round.

Oh dear, that's pretty conclusive: the cause isn't the controller or the wiring. I'm as sure as I can be without seeing it that the Treadmill motor is faulty.

If the case against the motor wasn't already strong enough, the photo of the controller wiring looks good.

I think Andrew's been unlucky: he's done everything right only to be stabbed in the back by a dud motor. Presumably it's second-hand and there isn't a supplier who will replace it free of charge? If so, how annoying, but try another one.

Dave

[AJAXParticipant @ajax]

The motor is rated for 4000 RPM and I'd guess that may be a bigger problem. Or do mini mills have significant reduction by the way of pulleys or gears? I have no experience using one.

[Howard LewisParticipant @howardlewis46836]

The plate confirms that it a Permanent magnet DC motor.

The fact that it knocks when run off a separate source, suggests to me that there is at least one armature winding that is either short or open circuit. A short circuit will be what keeps blowing fuses.

Luckily, it does not seem to have damaged the control board irreparably.

Either way. the motor is your problem, and is for practical and economic purposes, scrap.

Solution,

Buy and fit a motor that is correctly rated to match the control board.

Howard

[Andrew CresseyParticipant @andrewcressey80402]

I have removed the fan a for some reason knocking has stopped but it judders when running.

[Andrew CresseyParticipant @andrewcressey80402]

here is a video.

**LINK**

[Peter Cook 6Participant @petercook6]

Posted by Andrew Cressey on 15/01/2022 19:09:42:

I have removed the fan a for some reason knocking has stopped but it judders when running.

Fan (possibly slightly loose) was acting as a sound board. The motor is knackered. Any further effort is a waste of your time.

[Andrew CresseyParticipant @andrewcressey80402]

Hi Peter the person i bought it from suggested the bearings sounds damaged?

[AJAXParticipant @ajax]

If after this escapade you wish to continue with DC motors but keep your costs low, I recommend looking around for a used / spares only treadmill on Facebook marketplace. They are frequently available for very little money, sometimes free. I suggest keeping the running belt as it can be repurposed for many tasks.

Best of luck, Brian

[Andrew CresseyParticipant @andrewcressey80402]

 

Thanks everyone for all your help i have just purchased a new motor i hope this is more suitable for my application.

Mod edit: tried to rotate the photo and failed! Other Mods have more luck

Edited By SillyOldDuffer on 16/01/2022 11:27:03

Edited By SillyOldDuffer on 16/01/2022 11:32:38

 

Edited By JasonB on 16/01/2022 16:14:01

[SillyOldDufferModerator @sillyoldduffer]

Posted by Andrew Cressey on 16/01/2022 08:26:00:

Hi Peter the person i bought it from suggested the bearings sounds damaged?

Knackered bearings would explain rough running, but not the fuse blowing. There's an electrical problem.

Unfortunately a shorted armature winding explains rough running and the fuse blowing. I'm 99% sure your motor is a dud and needs to be replaced.

Nothing wrong with Treadmill Motors as a type, but bear in mind a second-hand motor may have been removed from a worn-out Treadmill. Although many treadmills are bought and rarely used, others are thrashed to death. Overheating is a likely cause of shorted windings: the motor was worked too hard for too long.

Dave

[Peter Cook 6Participant @petercook6]

Posted by Andrew Cressey on 16/01/2022 08:26:00:

Hi Peter the person i bought it from suggested the bearings sounds damaged?

Damaged bearings are highly unlikely to cause the controller fuse to blow unless the motor is so stiff to turn by hand that it is overloading, and I think you would have noticed.

Dave got there before me!

Edited By Peter Cook 6 on 16/01/2022 11:28:22

[John HaineParticipant @johnhaine32865]

That looks like a tidy new motor. I'm intrigued that it's a DC motor rated at 50/60 Hz though…

How many connections does it have, and does it have a field winding?

[AJAXParticipant @ajax]

Posted by John Haine on 16/01/2022 13:54:13:

That looks like a tidy new motor. I'm intrigued that it's a DC motor rated at 50/60 Hz though…

How many connections does it have, and does it have a field winding?

Perhaps it is a universal motor, but being sold as a DC motor? Greenmaster doesn't appear to be a brand or manufacturer with any data sheets.

[Andrew CresseyParticipant @andrewcressey80402]

here is a bit of information about the new motor.

https://hackaday.io/project/1730-improved-machinetool-dc-motor-controller/log/4941-specing-out

[John HaineParticipant @johnhaine32865]

Yup, seems it must be a permanent magnet field dc brush motor.

Edited By John Haine on 16/01/2022 16:10:39

[Andrew CresseyParticipant @andrewcressey80402]

This is off topic but i am selling a chester 920 lathe if anyone interested

[Howard LewisParticipant @howardlewis46836]

Andrew,

Why not list and describe the lathe in the Classifieds?

It may get more views there than on here.

Howard

[Andrew CresseyParticipant @andrewcressey80402]

Thanks Howard just done that

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