CNC Crashes, Bloopers & Goofs
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- Опубліковано 26 сер 2024
- We've made countless mistakes. Luckily we caught some on camera.
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Music copyrighted by John Saunders
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The Haimer tip in the pumpkin is absolute machinist comedy GOLD.
I think what really makes this hit home for me as a machinist is the audio. The number of times I've said or thought "yeah that cut is looking perfect" an instant before I blow up an end mill is... A lot. Hearing other machinists do the same exact thing makes me feel a lot better about it!
Well said.
As another self taught (And definitely still learning!) machinist, this makes me feel way better about some of the silly things I have done. The best part about making mistakes are the learning experiences that go along with them. Thanks for sharing!
I work with CNC and when you're an employee this isn't funny 🙈
Nahuel Ranieri yeah but if you double check it like your supposed to do you won’t have these problems like I run my first part in the air to make sure everything works
if youre the one who has to repair the machines later, then its just even more work
you wont believe how many people say "i didnt do anything wrong" and youre just going to the machine log that stores every input given to the machine and see something that cant end well like "yeah sure"
@@CommonRailCoop Not always the operators fault when coming to bumps especially in machine shops where machines run 24/7 . I've lost count of the amount of times I've seen a z axis jump 100mm on daewoo machining centres (dodgy home switches at home position, thinks its home when hitting dog switch) or a turret losing its position on a lathe and indexing the tool off centre height or even worse the wrong tool (swedturn lathes).Tbh Its funny if its happening to someone else as you know the boss attention is not on you that day, although it feels like a car crash when it happens to me.😂
When I first worked on my own the very next minute I managed to set a machine on fire but now i know those machines almost perfectly 😂
IT'S !! EVEN !! MORE !!! HILARIOUS !! WHEN !! YOU !! HAVE !! TO DO !! IT !! ALL !! BY !! HAND !!!
Looked like most of the crashes was due to insufficient work holding.
They have since invested in some quality orange vices.
understanding the mechanics of how a vice works would be really helpful. a lot of these jobs being held on tall parallels should have been dovetailed. you can't hold a row of multiple parts in a vice. only two parts with the gap between the parts centered in the vice. etc, etc.
Auarhau yeah like on purpose for the camera. Either you are a complete idiot or just some douchbag trying to get on UA-cam
Yo Daddy The fuck are you on about? Who said it was on purpose? 😐
I dont know anyone that would intentionally crash an expensive machine and waste expensive carbide cutters. Anyone that thinks they would do this, is clueless, as to what machine crashes can cost.
Reminds me of the stupid stuff we used to get up to in our engineering lessons at school... unsupervised 15-year-olds in a workshop is a seriously bad idea! Two groups of us used to wind each other up, and we sabotaged the other group's open evening CNC demonstration. The CNC machine spent 15 minutes painstakingly cutting a hold-up-to-the-light relief picture of Anna Kournikova into translucent plastic. After a few sneaky changes, the head of department had all the parents huddled round watching it finish, only for the machine to pick out a massive tool, destroy the plastic, and machine a phallic symbol into the vice holding the work! So immature, but it was hilarious at the time!
The moment we were left alone we were making swords, knuckle dusters, daggers, shurikens, throwing knives, you name it, we made it! We soldered hundreds of 12v piezo beepers together (each with a slightly different tone..) and hid it in the roof with a few batteries attached, making a horrible but tricky to locate whine.. we made canons out of the Co2 fire extinguisher, drew dicks onto every hidden surface imaginable, sandpapered the lenses in the laptop CD drives, and arranged every single one of the 25 laptops pointing towards the door, each one with "Meatspin" playing (along with sound, and the classroom projector running too). Unfortunately our head of year walked in before our useless teacher, and he hit the roof, bigtime! A friend's younger brother reliably informs me that our handiwork is still being found to this day, and we're still remembered as the worst class ever. I seem to remember we also took 15 soldering irons, arranged the tips into a ring and melted £50 worth of solder into a giant puck... idiots!
Your 'bloopers' look like my normal mode of operation!
Some of these make me feel normal.
Law-of Ohms thats funny i was just saying the same thing! 🤣👍
Seems like that would get expensive
noobs!
i remember when your profile pic was a thing
This is fantastic. Just this morning a friend of mine was asking me if I'm cursed or if everyone breaks tools and ruins parts. I'm sending him this immediately.
2:25 we totally need that sign at work XD
2:45-3:07 was pure gold.... no I take that back. the whole thing was pure gold John. Thanks for all the wisdom over the years. looking forward to learning with you for many more.
been a machinist since 98. i still laugh at these things which seem to happen all the time still.
This video is just what I needed... My Tormach has seen it's share of broken bits, 'pushed" out of the way parts, vises that got milled over the years... Great to see that am not the only one that experiences this. I have a nice, albeit small, collection of bits in a box I made with my CNC specifically to collect these "errors".
CNC- a faster way to get into trouble...
Thanks John, it is your honesty and humility that make your videos so great. I am still getting over the struggle of wanting to make perfect videos and just put out ok videos as I get better at shooting video and machining. I recently watched a few old (2013 era) videos of John Grimsmo in his garage with his DIY X2 CNC conversion....made me feel less bad about where I am at right now!
My favorite was the injection mold one were you said you did not want to plunge and it went straight down oh my gosh gave me a huge laugh
Mason Kubecka best part of a video! " Yea..like that " hahah ; )
You can see that chip stream coming off. Isn't that awesome?! Screeeeeeeeeeechhhh!!!!! That made me laugh. Another great video John!
As a self taught machinist currently teaching myself ,I too have and continue to make some mistakes. Nothing costly , yet. I have a Wabeco 1410 LF HS with enclosure etc, and was planning to add another machine in approx 6 months. It might be the same, but since watching your videos I am considering that 1100 Tormach. I am guessing by the shirt they pay you in some way or another, but if you were to buy another machine in its price range, would you consider others out there, or jump at another 1100?
That was my favorite.
That was my favorite as it decends in the vise, "look at that chip flow!"
For those of us who aren't machinists, little captions explaining what went wrong would be helpful. Some I understand, like not having the coolant/lube spray on, but others I had no idea what I was watching.
most were work pieces not being secured in vice/jaws, wrong tool offset (Causes it to plunge into the part), lack of programming stock area to include clamps on table (Tranverses across table and knocks the endmill off). Lack of coolant with carbide is not a bad thing, shocking it with coolant is.
Yeah pretty much summed it up. I got a real hearty laugh at 0:32 when the drill feeds in, but the spindle hasn't turned on yet. *Thunk.* *Spindle turns on.*
Oh man...someone did not check their safe approach and use what I call "chicken shit" switches. Single block & feedrate override set lowwwwwww and slowwwwwww.
For starters your mill shouldn't be able to self feed through its own rotation. That's just a bad day waiting to happen! When you're taking a cut your cutting surface should always be going in the opposite direction to your feed. For example on a clockwise spinning tool you'd do a LOT less damage running a perimeter sweep (see 4:12) going anticlockwise. It means you have to work against any backlash in your screws and gears, otherwise the tool would just pull itself in. I appreciate there's no appreciable backlash on these CNC machines, but one can see the result regardless.
You pick these things up when fucking about with ancient gear that's on its last legs, such as AvE's clapped out Bridgeport. You see it all go bad first hand and hopefully - not on expensive parts and/or machine tools. Yes, it's a right pain in the arse to try and do precision work using something a professional machinist would have scrapped within the hour, but if you learn the hard way you come away a better machinist.
233kosta if your machine is capable, its better to climb mill as much as possible. Cuts better, leaves better surface finish, improves tool life, less load on the tool so less likely to pull the tool out of the collet, among others. You have it backwards, the best machinist is the machinist who makes the part the fastest within the specified tolerance, not who makes the best part to the called dimension, dont go chasing a tolerance that isnt called for. Even on a blown out machine you can learn to climb mill on it when you just know how much your table moves and in what directions.
There are many videos of failure to ensure the last thing in the code is raising Z height until the tool end is clear of the work before returning X and Y to home. Should always be straight up first *then* X and Y can be allowed to simultaneously move to home. You can see the fail when a machine finishes a perfect part, then plows the cutter into it.
As an apprentice lathe operator stuff like this always scares the shit out of me. (luckily it hasn't happened too much to me!)
Just came in from the shop after trying to rapid a #21 drill through an aluminum fixture plate because I forgot to set my Z. Sigh, time to pack up for the night. The drill did not survive.
I can't tell you how much better this video made me feel about the many mistakes I have made. Thank you!
These certainly make machining follies seem more routine rather than the "I never make mistakes" master machinist everyone knows makes it out to be. Every self taught is always learning, thanks for the video!
Thank you John! We are human. That's how we learn.
I think it is great you guys are not afraid to admit you are human. anybody that tells you that they never crash are lying. I did CNC turning for 15 years mostly on Mazaks. Never got into milling too much.
1:03 geiger counter flashbacks
John, that you so much for the videos. You have certainly helped and encouraged me and thousands of others.
2:51 "I might only have 1 M8 tap, but you know what, let's try it!"
The professional version of "Hold my beer!" haha
as someone who is in teaching to become a toolmaker... i feel those. i forgot to tighten the work in the wise a few times, and it's not fun. luckily i only work on a regular mill and not on a CNC, and the parts im making so far in my internship are not critical or expensive, and they can usually be repaired
Rule 1: Clamp the work
Rule 2: Clamp the tool
Rule 3: Calculate Speed - No Guessing
Rule 4: Calculate feed/tooth - No Guessing
Rule 5: Prove the progam properly!! - No assumptions
BASIC STUFF
by the way, loved 2.09 'Isn't that awesome!!!' as he ploughs through the vice LOL
Plunging at full speed just makes you feel ALIVE doesn't it
Yes. So good to see it happens to others as well as me. It's all so very much a learning curve.
I really like your enthusiasm and honesty about being a machinist. Being a mechanical engineer myself I kind of understand the issues you guys have to deal with, but I would like to get away from the office and just spend much more time making parts. I envy you!
That was awesome, thanks for sharing REAL experiences! People see videos of perfect machining and don't realize how expensive an "OOPS!" can be (or how often they happen!).
Part of learning to machine on manual machines is that you get a 'feel' for what you can get away with on part holding. The feedback from a handle is nice to teach you how much tool pressure you will have in a certain situation. Most of my part holding is with vacuum, so it is very important to understand it as once you lose vac, you lost the part.
Starting out on a cnc makes it a little harder I think, you don't have that feedback from your hands, just sight and sound which are fine once experience has informed you what they mean.
Thanks for the videos...
I'm done with my mill education in 2 weeks and i never milled manually. So i don't have any feeling for this stuff so i totaly agree with you
i just love seeing errors made by the machines. tool bits breaking, flying chips, maaan, those are just awesome, although its dangerous. nice video
Do you keep your broken endmills in a jar of shame? I have kept them in a GS tool holder case and am looking for a larger container to hold them all!! I wanted to do an inventory at the end of the year to know just how much money went to my education/training. haha
megacanam we used to have a wall of shame :)
The Ol' UA-cam motto; record takes in the 20's, publish and compile once.
This was great man. There's a lot to be learned from mishaps, especially when shared. Pitfalls are so easy to step into when the one ahead doesn't call 'em. Thanks for putting out the slippery when wet signs for all us newbs.
Not too bad on the crashes actually, I was waiting for one that just tore a half an inch of bit through a vice, but it didn't happen. You got the balance between babysitting and letting your mill take it's steps on lockdown :)
That lower, nooooooooo :). Good stuff, thanks!
Rip AR lower receiver
He must be a closet anti-2A hater. Seriously, screwed up twice on one part. Hmmm.
If you've ever ran a CNC this video will make your stomach twist.
the air pipe hitting the camera and coming off the job, then it burning up HAHA.. so much precision and prep from these machines but it still can't account for a silly human error XD
Thanks! This video is right on time for me. Just getting started on a hobby mill G0759 and got pretty frustrated today. I have a looooong way to go and your video will keep me pushing on and learning.
dude I can't say thank you enough for sharing all the vids and knowledge, once I get some money together ill see you all at the cnc training!
Enjoyed...yet painful to watch...ouch!
Always wondered why my father taught me extreme measures mounting a part to be machined.. Shit can get hairy quick. Cool video glad to see everyone still in one piece.
This is soooo good. Admit it - we've all lost our Haimer in a pumpkin once or twice!
Love it! Man, I cringed when I saw the AR lowers! Lol. Keep up the great work John!
Now i feel much better, ive snapped bits for various reasons and figured a real machinist wouldn't do that. Thanks.
I remember that backwards bike from Smarter Every Day.
I didn't see any carbides come off the tool and go through the window. Creating a magnesium fire because your cutting speed is too fast is a great way to make a memorable day.
Breaking a 3D dial tip on a pumpkin has to be the saddest feeling. Love the videos!
the moment when everybody thinks you are such a professional cnc machinist but you know that stuff like this happens over and over again.
When I do voice overs for a 6min video, i cannot do it in one go! I do up to 200 recordings of various sentences and sometimes even single words that came out wrong.
Haha I feel that! I have to write scripts for my videos and I still stumble on my words and end up with 20+ takes. I usually edit out and splice together audio from separate takes though. Making a good video takes a lot of work!
It does! I edit roughly 3 days for a 6min video. Partially because I shoot and edit 4k with a not ideal PC.
Well not to tell you how to run a channel, but people generally don't tune in to YT for those perfect scripted TV shows, they tune in to see other people do silly shit.
So leaving in mistakes can often be much better for the feel of the video then some cynically edited piece.
+MsSomeonenew Exactly that, though there is a line between being silly and doing stupid shit and just adding some humor into a tutorial. But what (I think) Max and I were talking about was just the fact of trying to say what you want to say without tripping up on your own words or misspeaking when you have a lot of technical information you want to explain. Another instance is when I'm trying to explain a concept in a video and I say the wrong term, or I have to take a long pause because I forgot the right word. Admittedly, I'm still trying to find a flow that works best, but just my $.02 thus far. It's extremely rewarding though!
Max Maker I
Nothing that can't be buffed out 😆
Love it! This makes me feel so much better about all the times I've crashed or flung parts, thanks for sharing!
That e-stop button really takes a beating when you're teaching yourself, doesn't it? 😂
I have never ever crashed a manual lathe. From the first time I laid hands on one it was obvious to me to setup stops where I wanted the end of a cut to be, and after getting things set up to manually turn the spindle to ensure the chuck jaws and workpiece cannot hit the saddle, cross slide, compound slide or toolpost. Same thing with a manual mill, it's easy to not hit a vise or clamps. Move the table without power to the spindle and ensure the tool can't hit what you're not cutting.
For CNC mills, do an air cut first, with an empty table. If you're milling something clamped directly to the table, set a fake zero height above the table and keep a hand on the e-stop. When you've verified there's nothing hinky like the wrong direction on a Z retract or ending code that'll smash the tool through a completed piece, then you reset your Z offset. Of course accounting for any fixturing between the table top and workpiece bottom.
When the video started I was clenched as I knew crashes were coming. But I ended up laughing - I know I shouldn't but couldn't help it. 4:02 in particular had me drying my eyes! Your accidental deadpan delivery sealed it.
I also see you have got really advanced now - at 4:21 you have an automatic part ejection system!
I thought it was just me so thanks for sharing John . . . .
So nice to see that even the best make mistakes. Thank you for making some of these mistakes for me so that I didn't have to learn them. I DID find out however, that a #51 drill will plunge in at 20+ IPM at 10K rpm because I set T26 but not H26 lol.
Glad to see some good hardy humor mixed in with all of this knowledge. Never a dry episode!
Great video. All those times the Tormach stalled when you overloaded a tool? Your new Haas won't stop. A whole new level of scary. Trust me on that one. :-)
The Billy Joel song..."you're only human"....came to mind. Thanks for the video.
some were funny and some were just ouch! the moving lowers made me cry
It's amazing these contraptions work at all
I will never forget the first time I had to tell my boss I broke a tool. He said "well it looks like your a real operator now"
Two things, your machine should come with a little button called single block. It should also come with a function on the read out called distance to go, try using them.
My cheeks clenched a dozen times watching this.
"I might only have one M8 tap but you know what lets try it" Now those are some famous last words! Thanks for making this video was fun to watch.
tis the year of the great pumpkin Haimer crash nice video John, I was finale able to buy a lathe just a 9 / 20 inch but the price was right .wile you mostly mill you have still taught me a lot and I truly appreciate it. Thank you
I can’t imagine setting up a machine. Then setting up a camera. Then publishing the mistakes.
Well done! ;-)
Watching that AR lower receiver shift was hard to see. I hope you were able to save it. We built a reverse steering bike here too. In fact it's back in the shop right now because the UHMW gears I made for it didn't last. The client wants aluminum gears now. Should have it done and the video up by the end of next month.
Awesome. Looks like a pretty standard day in my shop.
I'm a self taught machinist, myself. I have to give my uncle Bob credit for teaching me conventional lathe work, my uncle Ernie gets credit for teaching me how to thread with die-heads, and spit tobacco juice into the coolant trough, and my Dad, for teaching me how to set-up box tools, or, roller turners. I'm retired now, and not being such a smart guy, my ability as a machinist is based on my tool collection, and, my collection of set-ups, and methods, learned from others. My Grandpa Lagerquist showed me that an old man, can outwork a young guy. I know you won't want to hear this, but if you can make a simple set-up, and even if you find yourself chasing clamps, it will pay off, man. Yes, you have all the equipment you need, for complex machining. In addition, you have business management skills, and programming skills, far beyond my simple hand programs. What I'd like to covey, is keep it simple, on low volume stuff.Mark Nelson
4:43 Real professionals in action
I kind of like the shots with the camera shrapnel. :-) It looks like you have been working on part ejection systems for awhile. At least yours are small, when you throw a 400lb chunk of iron off it gets real interesting!
awesome video man!!! i love watching machinists work the tolerances are unbelievable sometimes and as my grandaddy said mistakes are the only thing you can truly own!!! thank btw im not a machinist but i fab metal and some of my friends are cnc guys and they always come up with great ideas on how to do things!!!!!
0:55 to 1:05 feel like I just tested my safety glasses without blinking.
You can do this only if you own the company and have a lot of money to purchase new tool all the time.For machinist like this sounds amazing
That sinking feeling in the pit of your stomach when you break a tool.... Had that for most of the video lol
I sure feel like a nerd watching "cnc bloopers"
Good one John...........I just crashed my new 770 for the first time today! ...... scary, i think i peed a little!
This video is priceless! Laughing almost the whole time! Machinist humor for sure! Great video 😂😂
not as meany broken end mills as i thought. keep up the good work
Oh man.... I tried watching... I cant. I was cringing all through this!!
A guy running before me just snapped off a 7/8ths 2 flute end mill inside a .5 inch deep pocket in AL. There is two pockets and instead of going up in Z to get out of the pocket to go to the next one, he decided to go over in X and Y first lol. You talk about a loud SNAP! Scared the shit outa me!
The biggest endmill I've saw break on the heavy mill was a 3/4 - 4 flute solid carbide (more than one) an quite a few 3/4 hss. They really make a "ping" and fly off there! Mind you we where taking a heavy pass with them, in quard 500 :)
Ya 6061 T6 AL. is tough stuff!
Haha I was wondering when this one was going to come out!
I was FREAKING OUT!! Lucky you and your GoPros have all your appendages!
thank you! I'm a self taught machinist as well and it is good to see that I'm not the only one making mistakes!
Good stuff John!! 😆😆😆
Thanks, I just destroyed a part and was feeling in the dumps. This cheered me up.
You are human after all. Love the channel!
"Self-taught machinist" no kidding....
We just had a real doozy of a wreck last week. $38,000 worth of damage. The operator made an offset to the tool and it wouldn’t take it. It was out of the soft limit we set for safety. Instead of checking the problem he went in and increased the soft limit to accept the offset. The mill went in 2 millimeters instead of the .2 millimeters it was supposed to. It’s a 12” face mill that finishes the cylinder head mounting surface. It trashed the cutter body and the fixture and damaged the spindle. Security walked him out immediately. Fired on the spot.
Hire experienced people
I'll confess... wrong tool offset/wrong tool number got me more than once. Nothing causes your butt to eat your underwear more than watching a rapid Z turn your brand new, expensive 1" solid carbide endmill turning into matching bookends.
Great, wonderful, funny... having a blast! Thank you for sharing... and so nice to hear that you still can laugh about yourself... very important! All the best... stay save!
This is my new favorite thing to watch.. CNC fails.
The problem always seems to be that most machinists want to run the cutter at max speed and the path at top speed and what you often end up with is a broken tool or a Totally screwed up job that you have to do over ( which takes MORE time) IF you have the Material. The Machine Doesn't have EYES, and it can't FEEL the vibration, that something is wrong. It is just a Number Cruncher.
when you feel pretty sure of your programming or your setting up when you are many hours on the easiest project you are so close to make a mistake! i am a master crashing on the clamping tools!! :D
“If you’re not failing you’re not trying hard enough” -Johnny Knoxville
Thank you for sharing these
It brings the reality back into this.
The facility looks so nice and clean! And beautiful machines
Does that company make any money? Looks like an expensive operation.
Ray Davis obviously not companies arnt profit driven