[Larken]

UA_Iron,

If you zoom in on the pictures in post #12 of this thread, you can see where it says 1.2 deg on the motor, then on the drive it has a 3wire U,V,W connection to the windings instead of a 4 wire phase A and phase B.

I think this is the motor here
Leadshine Technology Co., Ltd.
because its 5.8 amp, like in the picture

(I think its a special high pole count brushless 3phase motor. )

Larry

[UA_Iron]

UA_Iron,

If you zoom in on the pictures in post #12 of this thread, you can see where it says 1.2 deg on the motor, then on the drive it has a 3wire U,V,W connection to the windings instead of a 4 wire phase A and phase B.

I think this is the motor here
Leadshine Technology Co., Ltd.
because its 5.8 amp, like in the picture

(I think its a special high pole count brushless 3phase motor. )

Larry

You're right. Wow, usually costs of steppers with more than 2 phases starts to get high - including the controllers. I convinced myself that it couldn't be that cheap if it were 3 phases - hah.

Thanks for informing me.

[CS900]

Wow, lots of action in here. Thanks guys!

Power supply is at 48VDC. I'll check tonight to see if voltage drops under load. It's a toroidal power supply (part number: KL-4820)

It's not clear to me if this closed loop stepper implementation can take advantage of the PPR of the quadrature wave - essentially turning your 1000 points per revolution into 4000 discrete points. It eludes to this, but doesn't say it explicitly.

Yes I believe it does. PPR is set to 4000 from the factory.

Things to consider:
Are you wired up correctly? I believe so, they work just peachy without any load, and they come prewired from the factory. All I did was extend the leads on them and add a connector to plug into my enclosure

What kind of amperage is your power supply? It looks like these things can handle up to 6amps. 20A max could I be pushing too much current thru them? Hope I didn't burn anything out!

Do you know your actual torque requirements for your system? A holding torque of 2 Nm (~282oz-in) really is about 70-80% of that in the very low RPM range, then will continue to decrease. Really you're probably at around 225-200oz-in torque in the 100RPM range. I did not, but I use smaller steppers on my other mini mill, and they have WAY more torque at 48V than these buggers do.

What RPM are you running your steppers at? I've tried varying the RPM with no real difference. I've gone down to 10RPM up to around 200 RPM with no noticable difference

[UA_Iron]

Wow, lots of action in here. Thanks guys!

Power supply is at 48VDC. I'll check tonight to see if voltage drops under load. It's a toroidal power supply (part number: KL-4820)

Yes I believe it does. PPR is set to 4000 from the factory.

It looks like your power supply is good - more than enough amperage. You're running in the right RPM range... I'm kind of at a loss.

Might try swapping them out with your smaller ones and see how it runs.

I'd contact the supplier for support in this case