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MX4660 Setup Guide

Congratulations on your purchase of the CNC Router Parts
2.2 kW Plug and Play Spindle / VFD System!


Step 1

The first step in setting up your Spindle will be to connect your MX4660 Control Unit with your VFD. You should have received a SP/THC Cable and strain relief fitting with the Spindle and VFD kit.

14-pin Cable


If you choose to house your MX4660 in an enclosure, the included strain relief can be used to affix the SP/THC Cable to your control unit. Simply install it in any unused hole of appropriate size in your enclosure.

Strain Relief

The left (as shown) threaded end of the strain relief should be installed into the gland plate of the control unit, from the exterior. The clamping collar (at left in photo) should then be threaded onto the strain relief, from the interior, to hold it in place on the gland plate.


At this point, one end of the SP/THC Cable should have the 14-pin connector removed with the wires stripped to bare leads as shown in the photo series below.

Cut Connector

Clip one end of the SP/THC Cable as shown above.


Clip Sheathing

Strip the sheathing on the cable back at least 1.5" (it is easier to work with if you strip 1.5 - 3").


Strip Wires

Separate out and strip the Black, Red, Blue/White, Green, and Orange wires. They may now be ferruled or tinned if you desire, although they will function as bare wires. The remaining wires are not used and can be cut back.


The clipped and stripped end of the SP/THC Cable can now pass through the strain relief installed in your gland plate.

Ensure the cable nut (shown at the right in the strain relief image) is partially threaded onto the strain relief prior to inserting the cable.

Once there is a sufficient length of cable inside your control box to reach your MX4660, the cable nut can be tightened down onto the strain relief. This will secure the cable to the control unit.


The stripped and ferruled wires from the SP/THC Cable can now be connected to your MX4660. The image below shows where to insert each wire.

MX4660 Connection

MX4660 EGND: PWM signal ground to VFD (Black)
MX4660 0-10V Out: PWM signal 0-10v output to VFD (Red)
MX4660 +10Vdc In: 10V from input VFD required for PWM output (Blue/White)
MX4660 Output 1-: Spindle Relay Ground (Green)
MX4660 Output 1+: Spindle Relay Signal (Orange)


Step 2

You may now physically connect your VFD to your MX4660 Controller. The 14-pin connector on the cable you just connected to your MX4660 Controller will plug into the female 14-pin receptacle on the VFD unit.

14-pin Connection

The included M23 cable should be used to connect your VFD to your spindle and the VFD power cable should be plugged into an appropriate L6-30 240 volt outlet.


The arrows on the M23 cable ends should align with the panel mount M23 receptacles on both the spindle and VFD enclosure. If these arrows do not align, the cable will not make a functional connection. (see below)

M23 Connection


Step 3

Now that all the physical connections are complete, you must modify the Mach3 settings on your PC to ensure proper spindle operation.

Mach3 General Config

Under the Plugin Control drop down menu, select ESS-General Config and then make sure the PWM box is checked and the Base Hz is set to 25. Now Restart Mach3.


Mach3 Ports & Pins 1

Select "Ports and Pins" from the "Config" drop down menu then navigate to the "Motor Outputs" tab.

Make sure the Enabled column shows a green check mark next to Spindle and the Step and Dir pins are 14 and 0, respectively.

The Step Low Active must show a red X.

The Step Port must be 1 and the Dir Port must be 0.

Note: All of the other port and pin assignments in the above image should not be used as a reference.


Mach3 Ports & Pins 2

Again under "Ports and Pins" navigate to the "Output Signals" tab. Enable Output 2. The Output 2 Port and Pin numbers should be changed to 1 and 17, respectively.


Mach3 Ports & Pins 3

Again under "Ports and Pins" navigate to the "Spindle Setup" tab.

Under "Relay Control" un-check the box which says "Disable Spindle Relay."

Make sure "Clockwise (M3)" and "CCW (M4)" are both set to 2.

Under "General Parameters," "CW Delay Spin UP" should be set to 5. This ensures the spindle has time to get up to speed before starting a cutting operation. If you would prefer there is no delay before starting your program, leave this as 0.

Under "Motor Control" ensure the "Use Spindle Motor Output" and "PWM Control" boxes are both checked, while "Step/Dir Motor" is unchecked.

Set "PWM Base Frequency" to 25 and "Minimum PWM" to 0%.


Mach3 Motor Tuning

Under the drop down menu "Config" choose "Motor Tuning."

In the Motor Tuning and Setup window, select "Spindle." Set "Steps Per" to 1000, "Velocity" to 60 and "Acceleration" to 200.

Click Save Axis Settings and then hit "OK." If you do not press "Save Axis Settings" the changes will not be retained.


Mach3 Pulley Selection

Under the drop down menu "Config" choose "Spindle Pulleys."

In the Pulley Selection window, enter 7980 as the "Min Speed" and 24000 as the "Max Speed."

Do not alter "Ratio" and use Pulley Number 4 as that is the default.

Click "OK."


Mach3 Main Screen

Mach3 is now configured properly for spindle relay and speed control.

Under the "Config" drop down menu, select "Save Settings" to lock in all the changes that you just made.

To prepare for testing the spindle, connect the control unit to the VFD unit, connect the VFD unit to the spindle, then power on the VFD unit.

Make sure to clear space around the spindle shaft and either remove or tighten the collet nut on the spindle shaft before testing.


To test the spindle, enter a speed between 8000 and 24000 into the "Spindle Speed" box. If you enter a value too low it will bump to 7980, too high and it will bump to 24000. If you accidentally enter a value too low or high, hit reset twice to clear the error code which appears in the "Status" bar.

Once you have input a valid Spindle Speed (not RPM or S-OV), click the "Spindle CW F5" button to turn the spindle on and run it at that speed.

Check that you can adjust the speed while the spindle is on by entering various speeds between 8000 and 24000 into "Spindle Speed."

If the spindle responds to these speed commands, your VFD and Spindle package is ready to use!

If your spindle does not function properly, please Contact us.