Ready Steady Eddy

[JAZZCNC]

Ok lets have a reality check.!!

The spindle is a low powered affair, even at 2.2Kw and if the shit hit's the fan then reality is the situation will be one of just few things gone wrong.
E-stop is hit due to Limit or some other none spindle related condition then doesn't really matter how long spindle takes to slow down and coasting to a stop isn't long or problem.
E-stop is hit due to tool sticking etc then bloody thing will have stopped anyway or will grind to a halt dam quick.!!
E-stop is hit because you have been stupid enough to stick a hand or some other bodily part in the spindle then Yes you'll want the Spindle to stop quick has possibly but again your flesh or clothing will do a good job of acting has a braking and the spindle isn't powerful and doesn't have massive torque so will stall.!! . . So what I'm saying is the VFD's built in DC braking will be enough no resistor required.

Now regards the Kill power or Kill signal to VFD then I used to be Kill Signal guy but I'm now I Kill all power. Reason being what happens if the signal breaks or Even the VFD goes faulty.? Kill power and all doubt is removed. In practice the reality is the spindle will be jammed, either in material or flesh or in a situation where doesn't affect safety and the DC braking allowed without need for a resistor is more than enough.

For DIY use then it's more than good enough to just kill power and Let the spindle coast.