I think that the z axis brake is gone on my 1100, but before i go and buy a replacement i wanted to see if there were any other possible things that it could be. When i power up the mill, the head starts to drop before i can turn on the power to the machine itself. Meaning, i turn the computer on and as that is firing up but before i hit the main power, the head starts to drop fairly quickly but not violently. This time it dropped about half way down and then stopped. Also, as soon as i turn off the main power, the head drops slightly as well. I've also placed a coin on the z axis brake lever and turn the power on and it doesn't jump as i've read it should somewhere.
Seems that it is the z axis brake, but i shell out $300 for a new one, i want to make damn sure.
Thanks
Kyle