How to disable manual movement to axis

I watched now videos machines using circular saw with servo driving the blade

Or you can use relay logic circuit (not classic ladder) many machinery still working just using relays.
Better you learn to code yourself but untill you get it you can run using relays.
Elegant, fancy codes you will try to see and learn usually are hard to troubleshoot and maybe the machine downtime will be high, youll spend more time coding/troubleshooting instead making money

Previously I made such think. I remade automation of old CNC machine to Logo Siemens small PLC and Relays. Analog input to servos I made with analog potentiometers and stepping with voltage deviders.
It was funny and fast. But here I want to make such thing with remaking cnc to linuxcnc control.

Servos has one small disadvantage:
If you give them 0V to control input, they will still move, nevertheless how you configured "BIAS", it will move 1mm per minute but move.

When you use CNC control with PID regulator, bias will be always compensated.

I see.
I was thinking you are talking different thing, just want stop the blade induction motor, good Cmorley come to enlighten us and i dont messes your stuff.

What are you doing?
You dont use induction motor to control speed, you need precision to stop your saw?
So many machine types

I want to make cnc machine, because of use of servodrives. But this machine will be specialized for stone. I made such machines using PLC controllers.
In this one I want to change concept.
I was made like this in example