by bdring » Thu Dec 13, 2012 1:32 pm
I know all about best practices for interlock loops. In this case, I just needed to move forward and get past this simple glitch. I setup my machine so the Y home puts the nozzle in front of the printing bed. When Z homes during a G28 home all, there is nothing for the tip to crash into. If the limit switch does not electrically stop the Z, it will physically stop it by stalling the motors.
I was printing for over an hour last night without any extruder problems. I did have one failed print. I left the machine running for about 1/2 half hour to pick up my son at his band rehearsal. When I can home I touched the USB cable and it caused the Arduino to restart. I don't know if it was static or a loose cable. It has also happened a few times when I touched the printer. Could it be related to my HDPE mount. It could build static.
Bart
"If you didn't build it, you will never own it."