# How to determin if a 24v 50hz stepmotor is 24vac or 24vdc

#### Topduck71

Joined Sep 26, 2014
6

#### Topduck71

Joined Sep 26, 2014
6
aaah sorry 50hz is VAC...

i dont like the work with VAC... with my arduino... tooo many complication i think.

#### kubeek

Joined Sep 20, 2005
5,776
Definitely not good for CNC. The 50/60hz on it tells me that it most likely is a one-way only motor used in old gramophones and stuff like that.

#### bertus

Joined Apr 5, 2008
22,120
Hello,

The shown motor is AC and has a fixed RPM.
You could switch it on and off with a SSR.

Bertus

#### Topduck71

Joined Sep 26, 2014
6

i will put the motor away for later DIY projects... *G*

thanks again.

/TopDuck

Joined Jul 18, 2013
26,273
Not so much fixed rpm, just tied to the frequency of the supply, they are pretty much identical to any bi-polar DC stepper, but designed for higher than normal voltage and operate similar to the split phase induction motor in as much as a capacitor is used to create the split phase, they will run reverse just by swapping the windings.
Advantages: fixed rpm on set frequency and almost 'instant' stop start.
Often designed for 120/240AC 50/60Hz.
Max.

#### Topduck71

Joined Sep 26, 2014
6
Thnx Max...

But i think i will put my pure knowledge in the DC world... maybe i can use them else where in the future :-/

/TopDuck

Joined Jul 18, 2013
26,273
You could conceivably use them as Bi-polar DC steppers, just the DC power supply would be higher than is normal for DC steppers, and make a custom step/dir drive for them.
Max.

#### mcgyvr

Joined Oct 15, 2009
5,394
I hope you didn't pay that price for them..
You can get stepper motors for CNC applications for as little as $5 to$50 USD.
No idea what types of torques yours will require but NEMA 17 or 23 steppers are used all the time in DIY CNC applications.

oodles of them here
http://www.mpja.com/Stepper-Motors-and-Drivers/departments/101/

I run Nema 23 4.2V @3A (425 oz-in) steppers with a 24V power supply on my machine. I use the Smoothieboard/software and have been VERY happy with it even though it can't full power my steppers at 3A its more than sufficient using the onboard drivers on the smoothieboard.

#### Topduck71

Joined Sep 26, 2014
6
mcgyvr:

The site looks great, but anything above 16$will cost me more than the motor its self.... :-/ "living in Denmark", so everything outside the EU, is a pain for my wallet.... /TopDuck #### mcgyvr Joined Oct 15, 2009 5,394 mcgyvr: No i got them from a friend for free...*S* The site looks great, but anything above 16$ will cost me more than the motor its self.... :-/ "living in Denmark", so everything outside the EU, is a pain for my wallet....

/TopDuck
Yes as you didn't include your location in your profile I just took a shot in the dark..
I'm sure ebay (only 6000+ listings there for stepper motors) or any other surplus source in your area will have them too..
http://www.jvl.dk/

#### Topduck71

Joined Sep 26, 2014
6
Sorry, i will set the country ASAP.

i did some more search and found out that the Long Motor i selling from Germany
Ebay user
longsmotor666