Originally Posted by
GVigue
Well that does make sense Db but it does show another problem with the design. It indicates to me a poor execution of the software and safety switches. They should have used magnetic reed switches or other type of sealed switches given the environment they are in and as I mentioned earlier they should be hard wired to cut off all the motors. Safety switches should never be software controlled. Dividing the task between two separate switches is a bad idea too. One switch will always lag the other which could cause a timing issue especially since the software cycle is very slow - "could be more then 1/2s to process a signal"?. Two hard wired switches in series would have provided redundancy however. This would have saved me a bit as well as the OP. Now I have less faith in the cover then before :P