I have a VF-2 and my machine and it is producing alarm 291. This alarm occurs while doing tool changes. The alarm only happens when there is a tool in the spindle while changing tools. The alarm does not happen when there are no tools in the spindle while doing a tool change. I checked the clamp/unclamp switch and they are working properly. I removed cable 890 and 950b from the cable track to see if they were getting shorted out. I ran the cables on the outside of the cable track and ran the machine for a few hours today and the machine alarmed out about once or twice every hour while running. Can anyone direct me of what to check next? Is there anything I overlooked? Has anyone had a similar problem? You can contact me directly at [email protected] if you would like.