Yikes

[mowens]

Well, I just had a somewhat terrifying experience. The head on my AFP machine is massive. It contains A axis, B, and C.
We were dry running a program that was giving us problems. I was facing along the rail of A axis. It looked like it was about to over travel when it lost its mind. A axis took off faster than I've ever seen it. It sheared off the hard stop. Hundreds of ball bearings came shooting out in two curtains. I was standing between the two curtains unable to move which was good because a big junk of steel that used be the hard stop landed about 6 inches to my right. I didn't get a scratch and nobody else got hurt. That was a miracle. I was getting too complacent having pieces of this huge machine whizzing by me everyday. This could have ended very badly.

[gcode]

Glad you are OK
It's very easy to get complacent about things.
I'm also glad I'm not responsible for the repair bill.

[mowens]

Yes, this will not be cheap.
The A axis limit is -48 degrees. It is currently at -68.

[Dan_AKA_ROY23]

So, almost a RIP? Crazy.

Fate was on your side today.

[Jim at Gentex]

Holy crap, Mike!
I'm glad you are OK!!  

Yep, these things are definitely dangerous, and we do tend to get complacent.
Thanks for the reminder that bad things can happen at any time.

[JParis]

Holy Bejeezus

Glad you're OK...hope you had a change of pants, dayum

[gcode]

Yes, this will not be cheap.
The A axis limit is -48 degrees. It is currently at -68.

Hopefully you program did not tell it to do that.  

[gcode]

We had some excitement here Sunday night
Whether it was a drag race gone bad or a guy running from the cops or whatever is unknown.

About 250 yards down the street there is a stop sign.
The cross street has a 3 foot dip on both sides. If you ran that stop sign at 20mph it would wreck your car.

A car blew that stop sign at very high speed, demolished his wheels, suspension and lower half of his engine.
He flew over a 100 feet before hitting the ground and slid in a shower of sparks and flames down the road.
He smashed though a big transformer box (4 ft W x 5ft L x 3 ft tall) in the corner of our parking lot, destroyed that, slid another hundred feet and came to a stop halfway up the wall of our building. There are tire marks 10 feet up the wall.

This happened about 11PM Sunday night and it was all cleaned up when people started showing up for work at
5AM. The type of vehicle and the condition of the diver (and passengers ) is unknown.
I'm guessing there were no fatalities because there was nothing in the paper Monday or Tuesday.
We all got a day off because there was no power. They didn't get the power back on till 3PM Monday afternoon.

[mowens]

Wow!

There shoud be nothing the programmer or operator can do to make this motion happen.

[Shazam/TPP]

We had some excitement here Sunday night
Whether it was a drag race gone bad or a guy running from the cops or whatever is unknown.

About 250 yards down the street there is a stop sign.
The cross street has a 3 foot dip on both sides. If you ran that stop sign at 20mph it would wreck your car.

A car blew that stop sign at very high speed, demolished his wheels, suspension and lower half of his engine.
He flew over a 100 feet before hitting the ground and slid in a shower of sparks and flames down the road.
He smashed though a big transformer box (4 ft W x 5ft L x 3 ft tall) in the corner of our parking lot, destroyed that, slid another hundred feet and came to a stop halfway up the wall of our building. There are tire marks 10 feet up the wall.

This happened about 11PM Sunday night and it was all cleaned up when people started showing up for work at
5AM. The type of vehicle and the condition of the diver (and passengers ) is unknown.
I'm guessing there were no fatalities because there was nothing in the paper Monday or Tuesday.
We all got a day off because there was no power. They didn't get the power back on till 3PM Monday afternoon.

that was Fauci chasing after someone to vaccinate, and wear additional masks....  

[Shazam/TPP]

Well, I just had a somewhat terrifying experience. I didn't get a scratch and nobody else got hurt. That was a miracle. I was getting too complacent having pieces of this huge machine whizzing by me everyday. This could have ended very badly.

retirement an option? glad to hear you or anyone else was not hurt.

[Jim at Gentex]

Wow!

There shoud be nothing the programmer or operator can do to make this motion happen.

Agreed.
Something obviously went haywire somewhere in the innards of the machine to allow it to go past a hard stop and shear it off like that.  

[CADCAM396]

I had no experience with machine axis run away until i entered the router world. apparently they do not have a positional feedback loop. this can lead to very dangerous situations.
glad you are ok. that could have ended very badly.

[neurosis]