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CNC crashed my new 300 PRC barrel

Kinetic Moose

Kinetic Moose

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Minuteman
Sep 12, 2018
291
212
Margaritaville....
#1
Well, the CNC lathe decided to take a bow yesterday and ram the entire tool turret into my new 300prc barrel as i was on the last pass of threading for the tuner. so very depressing, but impressive, pretty sure it bent the last 3 inches of the barrel as that's all that was sticking out. Optical encoder decided to take a shit.

life goes on.... post pics once i get it out of the machine...
DC786155-0CE8-4371-99ED-3F4A79E7257A.jpeg
 
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#3
Heh. I was drilling a proof carbon barrel for dimples and even threw in a test scrap piece.

It drilled all the way through the barrel when I went live. I found a bug in the control software.
 
#5
The King said:
Heh. I was drilling a proof carbon barrel for dimples and even threw in a test scrap piece.

It drilled all the way through the barrel when I went live. I found a bug in the control software.
Click to expand...
OUCH,,, ok i feel a little better. what sucks is we did two setup peices no problem, then on the final tweak it in for a smooth fit on the threads,,, ..
 
#9
Snuby642 said:
Well that sucks, maybe enough left to sell someone a nice hunting length barrel? Tactical length?
Click to expand...
yeah, i'lll measure it tomorrow, but looks like it will be too short for long range fun, thinking it's chopping a good 3 inches off the barrel for sure. maybe I can sell it to someone just looking to plink and look cool
 
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#12
Ouch!

I know how you feel though!

After ruining some expensive parts and paying for machine repairs, I got in the habit of doing simulated runs of all new g-code programs. I run them through the simulator in HSM, and then again on a copy of the machines motion control software, installed on my CAD/CAM computer.

Just to make sure everything works.

But, in the case of an encoder shitting the bed at an inopportune moment, I doubt that would have helped you. Bummer!
 
#13
I don't think that will stop a sensor failure. But ya always look for a crash on simulation.

I ran a gantry mill / engraver and sometimes mess up allowing for hovering over hold downs.

Some of the pieces would take hours and I would be drinking coffee fooling with another project. The sound of failure and walk of shame accross the shop sucked.
 
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#14
Curious what control is on the machine. Encoder failure should have caused a following error and shut down.

Like machine is commanding travel, and monitoring travel with the encoder if the feedback does not match the commanded travel within it's tolerance is suspends movement.
 
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#15
Not every piece of software is that robust. I ran some cheap substandard machines with the worst of software for drawing and preposting tool paths..

I would have to go in and tweek G-code and that was why I ran that stupid machine. Real machinists didn't want to deal with it and the fact that it was on a stand alone system due to license agreements drawing the part from scratch and sometimes FYIO program level security .

Pissed off my boss and the inspector that didn't have enough clearance. Lol
 
#17
ken226 said:
Ouch!

I know how you feel though!

After ruining some expensive parts and paying for machine repairs, I got in the habit of doing simulated runs of all new g-code programs. I run them through the simulator in HSM, and then again on a copy of the machines motion control software, installed on my CAD/CAM computer.

Just to make sure everything works.

But, in the case of an encoder shitting the bed at an inopportune moment, I doubt that would have helped you. Bummer!
Click to expand...
yeah the verify passed no problems, but there was something up with the hardware, the ass end of the lathe is currently sitting in a dozen pieces or so waiting for the part. Machinist felt really bad offered to buy me a barrel, but he doesn't know what it takes to chamber etc....
 
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