Just checked my spindle load meter after 3 years of running

I finally looked at the data logs on our Mori Seiki NH4000 and saw that my average spindle load has been at 85% for the last 18 months. Mitsubishi recommended staying under 70% for tool life, so I've been pushing way harder than I should. Found that stat in the maintenance manual tucked behind the cabinet door. Has anyone else caught something like this in their own logs that made you change how you program?

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faith_carter3mo ago

Recommended staying under 70% for tool life" - that's a pretty generic guideline though, isn't it? Mitsubishi has to cover their bases with a blanket number, but real world conditions are always different. Ive run spindles at 90% for years on certain jobs and never saw a single tool failure that wasnt operator error. How do you even know that 85% was actually causing problems or just what the manual says to avoid lawsuits? Seems like a lot of shops run hotter than that and nobody panics.

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hayden_nelson853mo ago

Right because nothing says precision engineering like "eh, close enough, the bearings haven't melted yet.

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