What is the error described as M7073 in the solution?

Who is the client that was given the solution with the error?

What is the error id of 74 that the client is asked to check?

What is the purpose of the slide table limit machine code?
The solution to M7073 error that states the limit on the Z axis is abnormal, close to the origin end (X13) is to check whether the slide table touches the limit. This can be accomplished by physically inspecting