Brake control for rotary 4th axis?

[G0Z0]

Hello,
For my 4th axis, I want to add a brake, and I'm planning to use the "current Hi/low" feature to control it. In the documentation, it is stated that the pin activates "few" milliseconds before motion and deactivates "few" milliseconds after. My concerns are the "few" is not enough for the mechanics to properly move before motion, and I wonder if one can give me a better idea of the time involved. I guess the delay change with the controller, mine is ethernet (UC300ETH-5LPT + UCBB).
If the "current hi/low" feature appears to not be suitable for that, could one suggest another way, excepted changing the postprocessor ?
Thanks

[cncdrive]

Yes, thats how the current hi/low function works.
If I recall it happens 20 msec before and after the motion, but you could measure it out yourself to make sure.
I think it should be enough to turn a brake on/off, but ofcourse it depends on the motor brake you have.