sevakprime

I have the same problem. I also did the same things that Nigel tried. I've checked the wiring and the z switch. The hardware is all connected and working properly. In fact, when you first turn on the printer after updating the firmware, the table properly activates the z-switch on its way down, and stops. I've re-installed the firmware (for the "+") several times and re-tried. Each time I get the same error. It seems the new firmware believes the table's travel down should be shorter than it actually is, so it stops before reaching the switch, by a bit over 2 inches. After contacting the seller of the upgrade kit, I've tried with firmwares from Cura versions 2.1.2 and 15.04.6. I also tried this when calibrating the table height. Instead of going up to the nozzle, I went up only half-way (roughly 6-7 inches off the bottom). Then, completed the calibration steps although the nozzle was no where near the table. On the table's shorter travel down, it properly triggered the z switch and didn't complain anymore. So, it seems that there is an internal threshold that is triggered to stop the table when the table comes back down at the end of the calibration. This threshold stops the table far too short of triggering the z-switch, causing the software to emergency stop the table. Please help! This is very frustrating. Thank you!