My Spindle has 4 pins but only the U, V and W terminals at used for the Spindle. What about the 4th pin?

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Question #: 14408

Question: My Spindle has 4 pins but only the U, V and W terminals at used for the Spindle. What about the 4th pin?

Current Solution

The terminals of U, V and W from the VFD (Variable Frequency Drive) connects to the three coils (first three pins of the connector) of the spindle. The 4th pin in the spindle is typically not connected; however, bring a wire from the PE (Protective Earth or Earth Ground) from the VFD and connect it to one of the screws of the connector on the spindle. This will ground the body of the spindle.

Additional Information:
The winding in your motor is start connected, U, V & W are the 3-phases of the motor and the 4th one is the common. Same as star connection.

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Other Possible Solutions to this Question

What length of wire do you recommend for the black toe (2'x4') between the spindle and VFD?
The length of the cable from the VFD (Variable Frequency Drive) to the actual spindle should be about the same as the z-axis cable from the z-axis motor to the z-axis driver which is recommended at 11 feet. This is locating the VFD about at the midpoint of the machine.
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What length of wire do you recommend for the black toe (2'x4') between the spindle and VFD?
What power supply do you recommend for the spindle and limit switches if I buy the USB Mach3 breakout board?
Any of the following power supplies will be fine for powering the Mach3 USB controller:
https://www.buildyourcnc.com/item/24v

however, the limit switches do not need high current, so the following power supply is sufficient for the task of connecting limit switches:
https://www.buildyourcnc.com/item/electronicsAndMotors-power-supply-24v-1a-dc
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What power supply do you recommend for the spindle and limit switches if I buy the USB Mach3 breakout board?
I bought and downloaded about 2 years ago, recently my PC that I use for my CNC crashed and now have to reinstall Mach3 but the license download has since expired. What I need to do to activate the software?
I can send you a new license. All you need to do is email me at customerservice@buildyourcnc.com and state the name the license is under and I will send you another license.
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I bought and downloaded about 2 years ago, recently my PC that I use for my CNC crashed and now have to reinstall Mach3 but the license download has since expired. What I need to do to activate the software?
Witch size of water tubes is used for the 2,2 Khz spindle and do I need som fitings for the Submersible Water Pump
The spindle water inlet and outlet fittings are 1/4 Inside Diameter and 3/8 Outside Diameter.

You can find the silicone tubes here:
https://buildyourcnc.com/item/pneumatic-hydraulic-silicone-tubing

This fitting will connect to the pump (1/2" male to 1/4" female):
https://buildyourcnc.com/item/pneumatic-hydraulic-Tube-Fitting-Female-to-Male

And this fitting will provide a reduced barbed size (1/4") for the tube:
https://buildyourcnc.com/item/pneumatic-hydraulic-Tube-Fitting-Barbed-to-Male
Click the link to add information to this solution:
Witch size of water tubes is used for the 2,2 Khz spindle and do I need som fitings for the Submersible Water Pump
whiteant the main board has a slot for some type of memory like an old SD card. What is that used for and how is it used?
You can have files in the SD card that you would wish to print rather than using the PC to store the files. Using replicator g, you should be able to load the file from your SD card, and print them accordingly.
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whiteant the main board has a slot for some type of memory like an old SD card. What is that used for and how is it used?
[801] Is this enough rating for a Nema 34 motor with max 6 amps? Also what about a 220V 2200Watt Spindle?
For the NEMA 34 stepper motor with a maximum current of 6 amps, 18 AWG wire would technically be sufficient. According to the American Wire Gauge (AWG) standard, 18 AWG wire can handle up to around 10 amps of current in chassis wiring and around 16 amps in power transmission. If you are considering running a very long length of cable from the driver to the stepper motor, you may want to consider using 16 AWG.

As for the spindle, this wire gauge is well-suited. There are three phase shifts, each at 120 degrees and each conductor is carrying only 1/3 of the power. At 220v, 2200 watts / 220 V = 10 amps. 1/3 of 10 amps is 3.333 amps, so each conductor will be have a load of 3.33 amps.
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[801] Is this enough rating for a Nema 34 motor with max 6 amps? Also what about a 220V 2200Watt Spindle?
I ordered the blacktooth laser cutter, there were only 4 red spade terminals, but the instructions pictures show that there should be more and would include blue spade terminals
If you received fewer parts than is called for in the instructions, we will send the proper parts to you. Please call us to have these parts sent to you.
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I ordered the blacktooth laser cutter, there were only 4 red spade terminals, but the instructions pictures show that there should be more and would include blue spade terminals
What 1/2" collet and nut do I use for the Greenbull with the 2KW spindle? I want to order the Onsrud Spoilboard surfacing cutter.
For the 2.2kW Spindle you would need the ER20 1/2" Collet.
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What 1/2" collet and nut do I use for the Greenbull with the 2KW spindle? I want to order the Onsrud Spoilboard surfacing cutter.
WHAT TERMINALS ARE USED TO CONNECT THE INVERTER WALL OUTLET?
Input to VFD:
240V Active - R
240V Neutral - S
Ground - E

Additional Information:
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WHAT TERMINALS ARE USED TO CONNECT THE INVERTER WALL OUTLET?
Can the Blacktooth be used with mach 4 via usb, inventory page has a selection for mach 3 usb, but instructions say mach 3 can only be run via parrallel
If you received fewer parts than is called for in the instructions, we will send the proper parts to you. Please call us to have these parts sent to you.
Click the link to add information to this solution:
Can the Blacktooth be used with mach 4 via usb, inventory page has a selection for mach 3 usb, but instructions say mach 3 can only be run via parrallel
Can the Blacktooth be used with mach 4 via usb, inventory page has a selection for mach 3 usb, but instructions say mach 3 can only be run via parrallel
Yes, the blackTooth (and Mach3) can be used with the USB interface board.
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Can the Blacktooth be used with mach 4 via usb, inventory page has a selection for mach 3 usb, but instructions say mach 3 can only be run via parrallel
What is the minimum RPM for the 2.2 kW spindle? Info on spindle page says 0-24,000. Elsewhere in this knowledge base it says 6000. My edge finder has a1500 RPM limit.
The lowest Hz for a 2 pole 2.2kW spindle is 250 Hz. That works out to 15,000 RPM. If you need lower RPM, a separate spindle will be required. This is typical for industrial CNC machines where spindles are changed out to mill on different materials.

Additional Information:
Thank you for the reply.

Does that mean the 2.2 kW spindle sold by BYCNC is a 2-pole, not a 4-pole? There don't seem to be specs on the website for the 2.2 kW spindle.

I currently have the 1.5 kW spindle from BYCNC and can run from 0-24000. 1500 is no problem. I never mill at that low of a speed, just use the edge finder to set the workpiece coordinates.
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What is the minimum RPM for the 2.2 kW spindle? Info on spindle page says 0-24,000. Elsewhere in this knowledge base it says 6000. My edge finder has a1500 RPM limit.
[78] what type of bearings are used in the 2.2 kW (kilowatt) Water Cooled Spindle
The 2.2kW spindle has 4 bearings in total:
- two 7005 angular contact ball bearings and 25mm ID x 47mm OD x 12mm W
- two 7002 angular contact single row ball bearings with the dimensions 15mm ID X OD 32mm X W 9mm
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[78] what type of bearings are used in the 2.2 kW (kilowatt) Water Cooled Spindle
I need a customised blackfoot without spindle but mount for vacuum pump pick and place.What software do I need and what's the quote
We currently do not have that application implemented in our design. please suggest this in our R/D section (http://buildyourcnc.com/ResDev.aspx).
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I need a customised blackfoot without spindle but mount for vacuum pump pick and place.What software do I need and what's the quote
I WIRED MY VFD (2.2KW VERSION) AND TRIED TEST RUNNING THE SPINDLE. CONFIGURED TO YOUR SPECS ON THIS WEBSITE, ONLY ISSUE IS WE GOT AN ERROR CODE. ERR 02, DO YOU KNOW WHAT IS? OR HAVE A LIST OF CODES? THANK
Can you provide the model number of your VFD?

Yes, I have the "YL600 - 2S - 2K20"

It just came with a small booklet that is all in Chinese...
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I WIRED MY VFD (2.2KW VERSION) AND TRIED TEST RUNNING THE SPINDLE. CONFIGURED TO YOUR SPECS ON THIS WEBSITE, ONLY ISSUE IS WE GOT AN ERROR CODE. ERR 02, DO YOU KNOW WHAT IS? OR HAVE A LIST OF CODES? THANK
When I start my spindle I get a emergency stop in Mach 3. I have run shielded cable and it is grounded at the VFD it is wired per you site instructions. any idea what to check
You will definitely want to adjust your debounce setting in mach3 if your emergency or limit switch is engaging.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you ever fix this issue? I am having the same problem.

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Did you try changing the denounce setting?

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Meant to say denounce.
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When I start my spindle I get a emergency stop in Mach 3. I have run shielded cable and it is grounded at the VFD it is wired per you site instructions. any idea what to check
What is the liquid input and output barb size on your 2.2kw water cooled spindle?
The spindle water inlet and outlet fittings are 1/4 Inside Diameter and 3/8 Outside Diameter.

You can find the silicone tubes here:
https://buildyourcnc.com/item/pneumatic-hydraulic-silicone-tubing

This fitting will connect to the pump (1/2" male to 1/4" female):
https://buildyourcnc.com/item/pneumatic-hydraulic-Tube-Fitting-Female-to-Male

And this fitting will provide a reduced barbed size (1/4") for the tube:
https://buildyourcnc.com/item/pneumatic-hydraulic-Tube-Fitting-Barbed-to-Male
Click the link to add information to this solution:
What is the liquid input and output barb size on your 2.2kw water cooled spindle?
What is the recommended unit or brand of CPU cooling system for the 2.2 kw spindle on the Fabricator Pro machine
There really isn't any specific brand. We purchase the components in a disparate fashion from China. I will product a video today that shows all of the components that we use and also offer the components on the website.

From the upcoming video, you will be able to identify the parts is you feel you want to search for these components yourself.
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What is the recommended unit or brand of CPU cooling system for the 2.2 kw spindle on the Fabricator Pro machine
What gauge wire between the VFD and the 2.2K spindle? The spindle connection posts are very tiny, equivalent to 18 gauge, but that seems too small. What do you use?
The type of wire that should be used between the spindle and the VFD (Variable Frequency Driver also called the inverter) should be of stranded type and we use between 18 and 16 AWG.

The total current is divided among the three coil wires, therefor a wire gauge of 16 should be sufficient.

Currently we use 20AWG 4 conductor.

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Click the link to add information to this solution:
What gauge wire between the VFD and the 2.2K spindle? The spindle connection posts are very tiny, equivalent to 18 gauge, but that seems too small. What do you use?