small DC motor

I have a Moxon 2434.970.225-219 DC motor already fitted with a gear box. What is the intended working voltage, I have already looked on google, maybe I've missed something. The motor/gearbox is about 31mm in diameter and about 95mm long. John

Think you will have more luck looking for maxon rather than moxon. they have a web site but cant spot one you've got easily. Maybe a photo would help.

Is your motor not a Maxon rather than Moxon?

If Maxon, the part number does not look correct. You might try www.maxonmotor.com. The numbers their motors are listed on Ebay under are often not correct Maxon part numbers but are numbers assigned by Maxon and marked on motors for specific OEM customers for their orders.

Edited By Jeff Dayman on 15/08/2018 17:44:47

That size I'd lay odds on it being 12V, unless its for a special application, like aviation use.

Neil

Hi Guys,

I would guess 24 volt 3.4 Amp using the first part of the number.

Try putting 12 volts across it and see if it complains. Or if you have a variable voltage PSU with an ammeter, using that would give you some idea.

Yes, the motor is a Maxon says its was made in Switzerland. I have run the motor first on 12 volts and the gearbox output speed was 600rpm the did the same with 24 volts it ran cool as cucumber at 1200 rpm. I am thinking of making a power down feed for my bench top mill, using the small motor and one of those speed controller from PRC. I've had the set up running on the bench, very smooth. I'm thinking of using 6mm chain and sprockets, any better ideas will be welcome, it won't look elegant but should do the job. At the moment can't see how I can fabricate a neat cover for the sprockets and chain but will no doubt wake up in the early hours with the answer. John

Timing belt.

Draw two circles on a piece of card, equal to the diameter of the sprockets plus half an inch.( if the sprockets were say 2" and 4 " then the circles need to be 2 1/2 and 4 1/2" the circle distances need to be say 1" greater than the centre distance....( if that distance is 7" then the distance between the centres is 8". Now draw lines from the circumference to join each circle so you end up with a sort of uneven oval shape....Add a flange about an 1" wide....theres your cover..in card...transfer to sheet metal. Cut out and weld up or use your favourite method of joining metals...

Easier to make than describe...but I'm sure someone will have a more eloquent way of describing how to....

Found a picture of something that might inspire

John Fletcher

You are still going to need a fair size reduction on your chain / timing belt drive.I would dare say that when you are winding the handle for the down feed on your mill you are only turning at 30-40 rpm so you are going to need a 10-12:1 reduction.I would fear that relying on your speed controller to reduce the speed to that level will leave you with no torque .

I’ve used parvalux motors with 24v motors at 3 amp and 30rpm and they are only just powerful enough to lift the head on a wm 18 mill

Ian

Hi John,

I have a 220/240 volt AC 50Hz motor with around 15 rpm (I would have to check exact speed).

Unfortunately because it is an AC syncronous motor you will not be able to alter its speed it is very difficult to slow the motor down by loading it. Any use to you ? Maybe the gearbox ? Its yours if you want it. I don't remember why I kept it.

The only other suggestion is a car wiper motor. I use one for the table feed on my mill.

You dont say what your small mill is or how much torque is needed to drive the vertical axis, also without knowledge of the motor specification you dont know whether it will do the task, and very importantly how long for.

Maxon make a wide range of high quality motors some with precious metal brushes, ironless rotors and other features to enhance performance for specific applications. I am not conversant with Maxon's part numbering but if you go to a lot of work to use this motor and gearbox and it fails after a short time, a replacement motor will be expensive. It would definitely be best to do some investigation and experiments before you go to far.

For you to consider this application in the first place I presume the gearbox has a substantial output shaft?

Ian P

Many thanks fellows for your thoughts on my idea of down feed, its just an idea I had for a winter project to keep the brain working. john

"the circle distances need to be say 1" greater than the centre distance....( if that distance is 7" then the distance between the centres is 8"

Why the increase in centres John (Rudd)?

Regards Ian.

Edited By Circlip on 25/08/2018 11:14:17