UGRA CNC Spindle Wires question

[ifeliciano]

Sorry if this is basic knowledge. I could not find any info on it and since its the weekend, Andy at UGRA is not available to answer.

I removed the cover where the U,V, and W connections to the spindle are made. There are two sets of cables labeled U1, V1, W,1 and U2, V2, W2.
I was about to connect the VFD to the spindle when I noticed the cable connections do not match each other, for example U1 to U2, V1 to V2, etc...
FYI none of the cables have been moved. They are in the same position as received from vendor. The only changed made was to place the shunts
across the posts for 220∆

For those of you with UGRA CNC GMT Spindles is that how the cables are laid out?



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[ifeliciano]

No one? Not even Ugra CNC is responding.

[A_Camera]

U1 and U2 belong to the same coil.
V1 and V2 belong to the same coil.
W1 and W2 belong to the same coil.

The way you have the motor connected is a normal delta connection.
If you'd move the bridges to the bottom, connecting V2 to U2 and W2, then you'd get a Y connection.

So what is the question? To me it seems as it is connected just like you must connect it.

[ifeliciano]

U1 and U2 belong to the same coil.
V1 and V2 belong to the same coil.
W1 and W2 belong to the same coil.

The way you have the motor connected is a normal delta connection.
If you'd move the bridges to the bottom, connecting V2 to U2 and W2, then you'd get a Y connection.

So what is the question? To me it seems as it is connected just like you must connect it.

Thanks AI-Camera. Basically wanted to know if the wiring is right foe 220 delta. Which you verified.

So when connecting my VFD, do I connect U,V,W to motor U1, V1, W1??

[CitizenOfDreams]

Thanks AI-Camera. Basically wanted to know if the wiring is right foe 220 delta. Which you verified.

So when connecting my VFD, do I connect U,V,W to motor U1, V1, W1??

Either to U1/V1/W1 or to U2/V2/W2, does not matter. If the direction of rotation is opposite to what you expect, swap any two wires going from the VFD output.

[ifeliciano]

Either to U1/V1/W1 or to U2/V2/W2, does not matter. If the direction of rotation is opposite to what you expect, swap any two wires going from the VFD output.

Awesome. Someone accidentally discarded the spindle's spec sheet into the recycling bin, and I could not figure out the wiring. Thank you!

What upsets me the most is that several emails and a phone call over the past 5 days have yielded no support from UGRA CNC.
Might as well take my chances and buy a spindle from China, and not pay the up-charge for a GMT spindle from UGRA.