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Old 11-06-2019, 11:00 AM
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Default Dodging a bullet - CNC mill goes wild

Fly cutter goes flying ...

https://www.reddit.com/r/Machinists/...t_found_on_fb/
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Old 11-06-2019, 11:46 AM
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Old 11-06-2019, 12:19 PM
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Wonder who made the flycutter?
Wonder if it was the proper counterweight for the cutter?
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Old 11-06-2019, 02:04 PM
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Quote:
Originally Posted by Ironman View Post
Wonder who made the flycutter?
Wonder if it was the proper counterweight for the cutter?
A tool with that big a diameter should not be spinning at 12k, period.
Also a 30 taper is on the small side for that.

Also he said they have had issues with that machine doing random things.
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Old 11-06-2019, 04:50 PM
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Something seems strange though. Most machines are setup these days that if something fails or happens, they go to zero state or shut down, not runaway.

I can see how a piece the size of that counterweight can do that sort of damage though. First shop I was at almost 30 years ago now, had a cnc lathe crash and ended up breaking the 3” diameter tool turret spindle.


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Old 11-07-2019, 01:36 AM
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Maybe programming error . Had a metric programmed vertical lathe that a decreed train driver programmed in imperial . 28,000 dollar chuck later he called it a night . I had the joy of a 24 hour day and it was running when he came in the next morning . Soft jaws in the chuck and used the machine to bore true . when we scrapped the job no one knew it happened .
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Old 11-24-2019, 12:47 AM
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Moving programs from one CNC machine to another can cause some pretty big issues also. Flatbed, gang tool lathes allow for a negative z value. When you load that program into the lathe next to it that is a live tool turret lathe and it rapids the turret into the chuck, you have to send the whole turret back to Hardringe to get it rebuilt.
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Old 11-24-2019, 12:53 AM
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Looks like a Haas machine to me.
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