Is it a good idea to get cheap stepper motors from China

[AnonymousChen]

Hi there

I'm trying to buy a NEMA 17 stepper motor from China is it worth the $50 for 5 of them

http://www.aliexpress.com/item/Best-Selling-5-PCS-Wantai-4-lead-Nema-17-Stepper-Motor-42BYGHW609-3400g-cm-48-oz/599005546.html

-Richard

[ken ihara]

That is a good price for a NEMA 17.   It is the price of shipping that will hurt the most.

Make sure your electronics can drive the 609 -- that model has a very low phase resistance so it will get very hot if you run it at, say, 5V.

Ken

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[Luke Weston]

There's nothing wrong with those WanTai 42BYGHW811s, lots of people use them with perfectly good results, and that price, excluding shipping, is roughly typical.

The basic specs are here, if you're interested: www.phidgets.com/documentation/Phidgets/3312_0_Datasheet.pdf

On Saturday, 24 November 2012 22:19:07 UTC+11, ken ihara wrote:

That is a good price for a NEMA 17.   It is the price of shipping that will hurt the most.

Make sure your electronics can drive the 609 -- that model has a very low phase resistance so it will get very hot if you run it at, say, 5V.

 
Yeah, you'll need to be driving it from a stepper motor driver IC that provides active current regulation - such as any of the Allegro or TI etc. etc. driver ICs that most people use to drive 3D printers and various other small sorts of small CNC machines.

But something like a really basic H-bridge that doesn't regulate the current, such as the L293 (or something that uses it, such as the Adafruit motor shield) is not practical to use.