Spindle to uniport

[D-man]

What happens when you manually click the spindle button?
Does the spindle start instantly, or is there still a delay?

It starts straight away

[JAZZCNC]

It starts straight away

This is strange.? The spindle button is exactly the same has M3 in the code which basicly just turns output #2 on, M5 turns it OFF.
The Spindle General parameter for setting delay just creates a delay after the M3 command is processed before processing the next command.

In the MDI type S6000 M3 and see if it starts instantly.? . . . then M5 to stop it.
Then make sure the machine is safe to move 100mm in X direction and type. S6000 M3 G0 x100.
Depending on the delay setting you should see the spindle start and a pause with Dwell LED flashing on screen with length = to the delay setting before the X axis moves.