Stepper Motor Question

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brjig
Posts: 13
Joined: Sun May 04, 2014 5:44 am

Stepper Motor Question

Post by brjig » Sun May 18, 2014 9:41 pm

I recently purchased a shapeoko 2 full kit.

I own, from a previous project, 3 Nema 23 320OZ Stepper motors.
Can I use these to mount on my X and Y axis and use them.
They have a 1/4" shaft size, If I need to purchase new pulleys and belts thats fine. But this is some heavy duty motors, so will they be overkill or just the right motor to do some crazy stuff.

These are the motors I have
Step Angle: 1.8o +/- 5%
No. of Phase: 2
Weight: 1.15kg Max
Voltage: 3.15V
Current/Phase: 3.5A
Inductance/Phase: 4.1 +/- 20%mH
Resistance/Phase: 0.9 +/- 10% Ohm
Holding Torque: 28Kg/cm

Thanks

cvoinescu
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Re: Stepper Motor Question

Post by cvoinescu » Sun May 18, 2014 9:48 pm

In my opinion, they're overkill, and about twice as heavy as the largest motor I'd put on a Shapeoko.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

brjig
Posts: 13
Joined: Sun May 04, 2014 5:44 am

Re: Stepper Motor Question

Post by brjig » Sun May 18, 2014 10:06 pm

So my best bet is to just order the nema 23's from inventables?
Other than the additional motors, pulleys and belts, Is there anything else that I need.

WillAdams
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Re: Stepper Motor Question

Post by WillAdams » Sun May 18, 2014 10:24 pm

I'd characterize Inventables as the safest bet.

We've got everything needed on the wiki on the BOM page. There's also a link to a blog post or project I believe.

Here: http://blog.inventables.com/2014/04/upg ... ma-23.html
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
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cvoinescu
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Re: Stepper Motor Question

Post by cvoinescu » Sun May 18, 2014 10:25 pm

If you plan to use the electronics that came with the kit, the Inventables motors are fine, but, ideally, you'd have a motor with a rated current between 1.7 A and 2 A. You'd be able to drive such a motor to its rated current with the gShield, and get all the torque it is capable of. The 2.8 A motor from Inventables will work and will give you respectable torque, but you won't be able to supply it with 2.8 A and get the full rated torque. In practice, this doesn't make a great difference, but it's worth looking around a bit, maybe you can find a motor with the ideal specs.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

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