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Messages - Demanth

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1
You either have a open motor winding or bad connection between the drive and motor. The motor connector plug has 4 female terminals pins and only 3 are used for the motor windings. My bet is the motor connector plug is miswired. Meaning only 2 of the 3 terminal pins are connected to the motor windings. Its very easy to miswire the terminal pins. The Chinese spindle motors don't have connection diagrams, you have to remove the screws on the motor male connector plug and lift it up to see what 3 pins are being used. Then solder the leads coming from the drive on the corresponding female connector pins. 

At 400hz the motor rotor is locked with full 230V... at 100hz its only about 57V so its easier to turn by hand. A 3 phase motor will run on 2 phases if spun to start however, it will quickly damage the motor because of overcurrent on the 2 powered phases. That's why the red "Trip" light is flickering on the drive.

If the drive overcurrent protection parameters are set correctly for the motor full load amps the drive should trip on overcurrent.

Thanks a lot for your input and help. I guess I will talk to the seller before messing with the wires.

Oh and the Trip light stays off once I make it start spinning.

2
Okay so I just did some testings and this is odd.

At 400hz the shaft is stiff and I can hardly spin it using my hand. So its locked.

I turned the spindle on in Mach3. Set the Hz on the panel to 100 (since at 400hz I couldn't manually spin it without a lot of resistance) and went with my finger and spun the spindle myself. After a little spin it started spinning by itself. Switching the hz on the panel made it spin faster/slower like it should.




3
assuming it spins freely, i'd think that the Base and Max frequency is set wrong, had to set mine to 300hz as the default was 50 on VFD

The problem is that is not spinning at all. The motor is making noise but the no spin happens. I've checked the VFD settings and they seem to be at 400.

4
I made a video to show whats happening:

https://www.youtube.com/watch?v=FsK72Wm4XSg

The light under "Trip" starts flickering when the RPM is above ~6000. When below that number, its off.

5
I just checked the website. They sell complete packages and assume the drive should be should be setup and the motor tested. 3 phase motor will hum and not turn if missing a phase. The drive should fault out on over current too. Any error codes showing up on the drive display?

Hey. Nope. I turn the spindle on in Mach3, set the Hz on the display using the knob and the motor just stays making noise. The display stays showing the hz and no codes.

6
Thanks for your reply.

How hard it is to check the VFD parameters? As far as I know they came pre configured and I have no idea how to mess with that.

Guess I'll have a chat with the seller.

Thanks once again.

7
Hey. I've recently bought a Carving-CNC x6 1500 cnc machine.

It comes with a 1.5kw spindle.

I'm done with the assembly and setup and everything works fine except for the spindle.

It turns on fine and the motor starts making a noise, but the spindle never rotates. It just stays there making the whining noise.

Any suggestion? Thanks!

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