Fan only goes to 50% in code despite setting, feel i'm missing something

[TTVert]

Not sure I understand what you are doing Code below

M106 P0 S255 sets the fan to 100% M106 P0 S127 sets the fan to 50%

Like wise for second fan

M106 P1 S255 sets the second fan to 100% M106 P1 S127 sets the second fan to 50%

Thanks, i understand the code. For some reason my slicer is just not changing fan speed on prints i feel meet the criteria for full fan speed. IE i have it set to full fan speed (M106 S255) at layer 6 but it always uses the min fan speed value that i set. Some prints (Like a benchy) it does change the fan speed quite a bit but that's based on min. layer time thus modifying the fan speed.Dave