We have an old Mori ZL-250 that we typically use just for simple parts that are turned, drilled, bored, etc. We have to do a small run of a part that is OD threaded and when we try to use any of the threading cycles we get a 490 alarm which is related to the spindle. This happens in G92, G76 and G32. All other G commands work fine. Any ideas about where to look? Thanks in advnace for any help you can provide.