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I'm with you on this there should only be one Power supply, there is no electrical reason to use more than (1) power supply, there is a reason why they do this though, and it is cost (3) lower watt...

Parts look good, what is the material, you use the word formply, I have not seen that is it available everywhere

You need a Snubber with any Relay Coil / Contactor Coil Switching or something in the circuit will burn up. some Relays have built in Snubber's you would have to check the specs of what you are...

Correct if it was anodized first it would be fine, and we don't really know what there mix is, they may have epoxy coated the aluminum before casting also

One thing I missed is the coolant drains...

As I posted in the first post the Brake needs to be powered for the shaft to turn on the machine or off the machine it makes no difference the Brake has to be released before you can turn the motor...

Yes, it's a lot of hype to make sales, to those that don't know any better.

Did you check the Kernel speed if this is too low you will get this message look in Ports / Pins Tab

M3 tells the Spindle to turn On M5 turns the Spindle Off M4 Reverses the Spindle direction you...

The base pour looks good, the rail mounting and the base supporting structure not so good, being a small machine, it most likely won't matter too much, the general concept is good that anyone could...

Yes, you would use a manual draw bar, make sure, if you get one of these spindles, that it has the Angular Contact Bearings at the front of the spindle some just have a regular deep grove Ball Bearing

The VFD Drive Parameter setting control the spindle minimum, max speed the PWM to analog only output how the a voltage, is output which he already confirmed as being correct

There should not be...

You can never run or even command a speed lower than the set parameter 120Hz 7200RPM if the spindle run then you do not have the Parameters set correct in the VFD Drive

Disconnect the 0-10v and...

If your Breakout Board requires 12v that would be normal, the PWM to Analog spindle speed control can only be 0-10v

In Mach3 look at Ports/Pin Spindle setup tab PWM setting it should be 100

Check the Config Tab in Mach3 under spindle Pulley Ratio 0----24000-----1 you may have to adjust this to get the right...

Don't forget the Ballscrew and motor mounting the part you have is easy mounting Ballscrews is just as important as Rails

If
PD007=20
then
PD010=11

Check for a Brake most Z axes have a Brake on the motor or the Ballscrew most are on the motor, the Brake has to release when the servo motor powers up, if this is not releasing the motor will fault...

What material are you burning

If the spindle turns On / Off then you have it correct, as One is normally open and one is normally closed, when the spindle is not running the Relay will be N/0

Can you use the Keypad Up/down arrow keys to change the speed or the Pot

Did you change the wiring to the 0-10v analog output this would be to the 2 screws closest to the Relay and the +/- has to...

If the spindle turns On / Off then you have it correct, as One is normally open and one is normally closed, when the spindle is not running the Relay will be N/0

Normally the steppers don't need a shielded cable, only the VFD Drive to spindle

As I said it was an electrical problem, Leadshine make a good stepper drive so now you know what direction to go....

It depends what motor you are running as to what those Parameters are set at the Default in the VFD Drives are either for a 50Hz or 60hz motor the Parameters you found are most likely what I have...

He is not missing Steps :)

As I said his axis is moving correctly.

Check the jumper J1 it may need to be in its other position this happens sometimes
Check these Parameters
PD044=??
PD072=300
PD073=120

When connected to the VFD is the 0-10v still changing...

What do you have for the Kernel setting, look in Ports / Pins

Check all the Mechatrolink Cables have a good connection to the drive and the hub, plus any other I/0 connections

No, a removeable tank or chip tray would not help with dampening, it can cause more resonance, which would only affect the tank or try and not your machine table, you won't have anything much from...

He has no problem with Step / Dir signals, motors are moving normally and positioning ok.

Make sure you are wired to the 0-10v analog output, I missed it on your drawing which is incorrect that is most likely why the trim pot was not doing anything because you have it wired incorrect.
...

What control are you using Mach3 or something else. in Mach3 you have to open Config Ports and Pins then the spindle setup tab, this is where the PWM setting is set to 100 and see what the voltage...