I actually looked away from the screen, thought you were gonna run the tool straight into the chuck on the first pass. I was actually scared.

I thought you would hit the jaws on that first pass! Not the worst crash, We had one where it sounded like a Cadillac drove into the shop wall.

Don't apologize for cutting air. "Safety passes" are important when machining from raw. I've had lots of bent bars that like to wobble well beyond normal. Work with what you got.

Is it just me or does anyone else get nightmares about crashing your machine?

I worked almost 2 years on both vertical and horizontal mills and the entire time i had a huge fear of crashing my machine. It was to the point where i regularly had nightmares about crashing it. Not gonna lie i felt a bit of anxiety/fear watching ur vid

*i felt my soul leave my body when that turn tool started to come out*

Thats a crash? Very first setup i did, ended up ripping the jaws off a Mazak QT40, destroyed an O.D. tool, and moved the machine 6 inches.

As a Journeyman shop foremen, I can tell you this is nothing but a small hiccup, happens daily on new fabs.

I think the rule of thumb is dont cut anything that is 3x longer then the diameter without extra support. So if you have a 1" part you shouldn't have more then 3" unsupported. Also hold onto more than the diameter or as much as you can.

My personal experience tells me there could be a few reasons , maybe even a combination of these reasons, 1. insufficient clamping length/ material too Long , 2. doing external cuts after doing a groove/ undercut is not ideal , 3.depth of cut might be too high . I’m just a newbie machinist so I might be wrong about this.

The suspense is killing me, knowing a crash is coming...

This is how hight quality in china works. Its still in engineering tolerance.

A few weeks ago I forgot to reset my tool geometry for a drill after having a boring bar in that tool slot. I was .843 in X, so needless to say I did not drill on center line and absolutely destroyed a $2,000 2" drill.

My tip is to write a canned cycle and set your D value for .075 or .05 so a crash like that can be avoided. also, its a lot easier than writing out all those g00 and g01.

I have seen worst crashes on CNC Lathe . Sometimes forgetting to write G01 after G00. In the above video the reason for crash seems to be inadequate chuck clamping pressure considering the overhang of the job, also too high feed for the overhang of the job. In manual programming and 1st time new job, run the programme at reduced feed rate.

had one where an internal tool tried to come out of the part in x and z when about two inches deep. we'd had the machine retro fitted from an old Allen Bradley to Fanuc. seems a chip from mounting the new control panel got shaken lose and the control tried to home the axis.

да это не важно какой вы обрабатываете материал,как черный металл так и цветной металл,результат будет один и тот как на этом видео-подрыв заготовки и режущего инструмента обеспечен.Причина одна -это большой вылет обрабатываемого материала ,тут необходимо зацентровать торец детали и подпереть задней бабкой для увеличения жесткости.Тогда вы сможете безопасно обрабатывать заготовку даже увеличить режимы резания

I imagine the chuck is hydraulic and clamps about .200 of an inch in, he was probably at .190 almost at Max limit, needs to move jaws in just a tic.

For me it looks like a weak crash.. I crashed in total like 10 times in 2 years. One of these costed nearly my life an one costed around 4000 dollars.. So you were verry lucky in my eyes.. Greetings from Switzerland. :)

insufficient clamp pressure from the jaws / wasn't done up properly, also I think the tool was moving too fast.

My fav is when a 9 5/8 pipe cutoff gets wedged into under the chucks, eggs it, and shoots our like a thirty pound steel bottle cap. We have had people bust off a couple tool arms that way if they not lucky. Peels back the steel shield for the chip tray like a banana if they are lucky.

Its all good i work this job for a year and i write programs ones i hit lathe so hard that all other machinist punch reset all of them thought that sound is from their machines ahahhaha

oh man the depth of pass and the tool feedrate is so high hahahahahahahhahahah i'm never do this before !

I do cnc service and repair and have seen many turrets broken off x axis, spindle bearing crashed, and x axis castings cracked, this is minor, not enough grip too far out from chuck

When the doors fly off you just walk over to your tool box and start rolling it outside. No use to clock out.

At least the tool holder moved. When our cnc at work crashes it usually sucks the part out of the chuck and kills the part and our whole tooling setup. Sometimes if we're lucky it'll just break the insert lol

not holding onto nearly enough of that material could have called that from a mile away

That happens, when you grip less than 1/3 of the total lenght.

that wasn't to bad at least the machine wasn't damaged

it's already obvious in the setup. clamping is not good

Try using a tailstock. And coolant.

i wouldnt even say that was a crash

#1 Not gripping enough material. Question. Was the turning tool loose in the holder. Very lucky that the bar did not come out of the hard jaws.

Too much per one time or the distance it’s too long. Best idea to turn on till half beyond the groove and clamp again from another side with using soft jaws.

When I see the first second of the video, i think: Not deep enough in the jaws. Or should be jaws with steps or how to say in englisch. To have a concrete clamping/positioning to the face inside the jaws.

It's good that you stopped the machine at the right time. Otherwise, it created a big mess. The problems was the part has less support while taking a heavy cut.

i agree that the clamping was poorly. Imagine it clamps air down there and ur jaws are a "V" holding the part. Also you need to use coolant or at least cutting oil. I'm sure there was some built up material on your insert.

NOT ENOUGH METAL INSIDE CHUCK, WHERES THE COOLANT. BIG DIAMETER FOR SO LITTLE HOLDING AREA. WASNT THAT BAD, I DIDNT SEE ANY SPARKS FLYING !!!!

Was to want to get chopping in G0, in addition to entering with a high depth of cut and wrong rotation, gave in what gave! Misaligned tower and broken tool.

The first few facing passes should've been enough of an indication to stop, too much chatter. The overhang was just too much.

Crash scene investigation said you didn’t tighten your tool holder bolts. 🧐

Whas that crash or work piece just poorly in the chuck

I've seen worse from people that have spend all life working on a cnc lathe. To watch a part that is more than 10 ton in weight to fell of the machine it takes some skill, but yeah the way you hold your part is most important thing in cnc machining

0:43 you are here for this😂

this shit happends alot when ur tired, bored or thinking of hot chicks .. Almost never anymore since i started using mastercam lathe for everything.

Oh, that wasn't really a crash. that was just a heavy overload. I was scared for those chuck jaws though, I thought you were gonna get 'em.

And just like that, that part is done.

See how there is only about 1" of aluminum in the chuck and 8" extended? Cutting more than .050 a pass is a high risk especially at that speed. If that's what you have to work with then drill a center hole and use a live swivel. Obviously this program faces off and then machines to size so that's an extra step but I know for a fact you won't have this failure. I've taken over .400 off on a pass but at much lower rotation and cutting speed, with no center and feet of stock in the chuck. I get the idea of how fast it can produce but with no material in the chuck this will happen every time. I run a manual lathe so I do everything.

Great catch m8! Could of definitely been a a lot worse

Were is the center ? should have had a prep op to put a No 2 centre in one end.Yes you did the first part right by leaving .125 away from the job but you failed by not having a machined center in one end. PS. ALWAYS HAVE A PREP OP FIRST

hard jams get worn and are no good forround stock on such short grip. Always use soft jaws.

Not much material clamped in the chuck for that kind of feed eh... Ü

You were lucky the turning tool wasn't wedged down tight. It could've been uglier

I guess most people here are expecting some tool losing, chuck diving action.

U got 2 empty passes u should make a radius of 1 when ur coming out for example if ur on sinumeric G1 X48 Z-49 and then G2 X50 Z-50 CR=1

Try using the tail stock mate or lighter cuts lol

sure sounds like a hass

送りが早すぎたのかな・・・ 英語コメントでG00とかG01とかあるけど、G01入れ忘れた人達なんだろうな 同士だわ

進幾太快了 看起來至少有F0.5 F0.2還差不多 夾這一點點的話

Why show this if there's no follow up explanation as to why. What's the point

my worst crash happened due to oil leak onto the circuit board of the CNC.......Not pretty.

Looked like to much of a cut on last pass.

Сдача слишком большая, ошибка программиста. Ну что, бывает.

Are people allergic to centers or something?

Program kaise banaae sir please video banaae sir

What kind of a machinist are you? now you may have to adjust the turret,its out of center

docela jsem to cekal ze se to stane, hned jak jsem to videl

Crazy!!!

Did you bend the turret?

Mors dur 2 fois le diamètre pour la longueur. Profondeur de passe trop importante. L'idéal en contre pointe

You need a bolt on Capto machine adapted clamping unit. Problem solved.

if you had a stop in the jaws it wouldnt of happen. plus lower your feed down to F.009

Why are you proofing your program at such high rapid

Ferramenta não foi fixado corretamente.

Ouch!

Good 💪

I meant 5 thou not 5 tenths, shit.

did i hear "o kurwa mać"?

You call that a crash? Shiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiit.

I'm good at doing that

What actually happened ? I think the deep of cut is OK.

feed rate override !

내 이랄줄 알았지....

Nothing wrong with cutting air. It's like a fart. Cut wind, cut the cheese. Looks like a minor crash compared to what I've seen and heard.

Rookie mistake.

😂 Typischer Anfänger Fehler 😂

,, o kurwa mać '' pl

Gsk?

Un trou de centre, et la contre-pointe, auraient évité ça...

G71

cheez no way i let you near mazak if you have fuckall to hold on to turn a shoulder for a start then get someone who knows what there doing to teach you before you hurt youreself or worse

OUCH !!! LOL

Ăn tham quá nó v

You could have got away with this if you knew how to run a roughing pass properly.

f1?????LOL

you went too fast