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Is rigid tapping very important for you?
What does it add over a tap in a floating tap holder?

I chose to skip rigid tapping for my build as it added considerable expense for a spindle encoder...

I have already listed some of the benefits.

1. Wiring is super easy - just ethernet cable. Reduced interference issues compared to bunch of wires running from motion control card to servo drives
...

Wrong. Read the manual.
Delta digital inputs and outputs (on the ethercat drives) can be configured as general purpose inputs and outputs.

For Delta, ethercat premium is about $50 per servo.

By not needing a hardware step generator (motion control board), I save that much.

So cost is neutral.

Wiring is less.
Feedback of...

Linuxcnc + ethercat works well.

Cheap too

$0 for linuxcnc. No motion control board needed, another $0.
Just need the ethercat servos.

1. Ideally a repeatable way of applying the force. A weight on a string, released from a repeatable location. Needs to hit the target once only.

2. Need to check metals yourself. I would not...

Agree about the ball screw / motor cavity in the base.
This will collect chips and coolant and fill up.
Needs drainage or open at the end.

Problem is access for the operator to the work area / work piece.

What are you cutting? That is the primary decider.

Sheet goods up to 25mm thick? Then a short Z axis/low gantry height.
Remember you need enough for workpiece, tool length, tool holder length.
...

How much do they want for Deltas locally? (I'm in NSW)

I bought mine OS, really just assumed they would be super expensive in Aus

A machine like this deserves modern AV servos!

If a machine / system has been developed with a component (e.g B2 servo) then often it is easiest to continue to use that component.

Any change of component requires work as the component is...

What's the bandwidth of the servo drive control loop?

I would guess if it was dithering causing the noise, the bandwidth would have to be equal or higher than the sound frequency??
I could be...

Circuit breakers protect wires, not electronic equipment.

They are to stop fires in buildings/walls.

They will not stop a fault within an electronic device from frying that device.

It might...

Looks like it's near 1kw

"The induction heater itself is very simple — a 48 volt, 20 amp power supply, an off-the-shelf zero-voltage switching (ZVS) driver, and a heavy copper coil"

https://hackaday.com/2020/10/26/simple-induction-heater-helps-with-homebrew-shrink-fitting/

There are DIY shrink fit examples out there.

Think also about how you will:
1. Control tool stick...

You need to supply a lot more info than that.

What do you need to replace? Screw plus mounts?
Why do you need to replace it?

What are the ball nut dimensions?

What are the end machining...

If your Z axis has "fixed rails" (attached to gantry carriage) and cars move (attached to Z plate) up/down, then you don't have any stiffness penalty for increasing Z travel up to allow for tool...

Bolting a manual mill to it?

Just build a steel bench

Or maybe regular concrete. Do not waste money on specialist grout or EG.

The base will not contribute strength/stiffness to an existing...

Did it make the sound from new? Have you tried altering the tuning at all?

BK mounts are only about 100N/um stiffness

Larger ball screws do have higher axial rigidity

Longer and double ball nuts have higher axial rigidity

Craig there are no physical signs of rolling. They do not have the little grooves in the crest (major diameter) that rolled screws do.

Are they the same standard as a premium brand name? Probably...

Craig you are incorrect

TBI make ground ball screws, as well as rolled (like every manufacturer). Loon at their catalog.

I have three ground TBI ball screws in my shed.
The difference between...

v102: Are you replacing the servo motor only (trying to use an existing drive) or are you replacing servo motor and drive together?

Craig, you are going to have to buy Delta B3 or E3 in the future. Apparently E3 is replacing B2

2 metres per second = 120 metres per minute = very fast

20g is massive acceleration

Your frame is completely unrealistic for what you want

Buy the ready made cables!

Usually:
Step pulse, ideally differential, therefore 2 wires
Direction pulse, ideally differential, therefore 2 wires
24v or 0v (depending on preference/wiring)...

Is the motion fixed / always the same? Or will you change programs?

Could do with an arduino / microcontroller (or multiple) if you don't need to change the program. Also possible to change...

Yes you should buy from a store that specialises in that type of product.

Fred / BST Automation is great for linear rails and ball screws.