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.😂
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.
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.
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?
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
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.
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!
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!
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!
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.
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!
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.
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!
<a href="#" class="seekto" data-time="171">2:51</a> "I might only have 1 M8 tap, but you know what, let's try it!" The professional version of "Hold my beer!" haha
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.
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
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
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!
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".
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!).
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!
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.
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.
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 :)
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
<a href="#" class="seekto" data-time="165">2:45</a>-<a href="#" class="seekto" data-time="187">3:07</a> 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.
No kidding, and you never think about it, until that helix pulls it out and you go from .4. Depth of cut to .7 and realize something is wrong, when it's far too late and your perfect vise jaws are gouged lol.
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. :-)
every one make mistakes... u got a chance to tap them.. cool... I'm also make mistake.. now i use that job as my chair... 😜😜 that make me how important is my job... ( if there any writing mistakes, I'm really sorry)
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.
Ahh... the video is over... I can un-clinch now. Have you had the "dont do this... (insert employee's name), be very certian you do NOT do this..." 2 seconds later... they do that. argh. .5 7-7flute endmill right through the part...
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.
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!
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!
broken my share of End mills, and maybe your share too. Had a good weekend zero crashes zero broken tools. I need to make a sign. I think may be the tool sellers need to throw in as a sticker
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. <a href="#" class="seekto" data-time="242">4:02</a> in particular had me drying my eyes! Your accidental deadpan delivery sealed it. I also see you have got really advanced now - at <a href="#" class="seekto" data-time="261">4:21</a> you have an automatic part ejection system! I thought it was just me so thanks for sharing John . . . .
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.
My diplomas in CNC programming and operating may have costed alot.. But not as much as all the tools and materials. Just a tip but maybe next time don't experiment with your last M8 tap another tip the only way to stop a tapping cycle is with the E -STOP CYCLE-Hold will not help you. Not trying to be rude JUST SAYING -;)
Hmmm, no, my vise jaws do not have any marks from end mills pulling out...nope.nope.nope. It is also educational at times when those types of things are caught on camera so you can help figure out the original problem with the setup and where it started to go wrong. They had a version of that bike on the Science channel about how the brain works (I think about how we learn). It was much easier for somebody to get it right if they had never ridden a bike before.
We are all human and make mistakes. Don't think everything always goes as planned. And in my experience most feel horrible when it happens. I've seen grown men cry. You try your best and you make a mistake, and most people are madder at them self's than the boss could be. We all take pride in what we do. And I have and seen others take a personal day because of what's going on in there life cause they're not focused in the task at hand. A lot of use rely on scrap rate for reviews, raises, and bonuses. Like this if you feel where I'm coming from.
Please take the word "Crashes" out of the title... I too am a self taught machinist. I've blown master jaws off of 24" pneumatic chucks and moved that CNC lathe 6". I now run that same shop, and it's now full of greens. I see bent bars at least once a week. What these look like are just bad setups. Good video though. Do always enjoy watching these machines do work.
Ahh so many times have i done so many of these on my Tormach PCNC 1100 although i still prefer my old school Bridgeport. It's hard to see but it looks like most of the cuts your doing are climb milling? That's usually what throws stuff out my jigs/vices. I don't have a cabinet, just the plastic screen on the tool bed. It likes to throw things at me if I'm not careful.
I retired a few years ago and when I sold my tool box I had 6 smashed indicators, spindle on at 3000 RPMs don't do justice to a interapid indicators. Roughly $900.00 worth of junk now.
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.
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.
Though I was really thinking that I would see some cool video takes on machining mishaps. I was sorely disappointed to see just some of your video outtakes were just about you and not being able to say the right words at the time. In all my years as a machinist, I have seen just about everything you could imagine with people not paying attention to what they are doing. Everything from seeing some guy who didn't tighten the chuck on his Lathe and watch the piece of material fly out and go across the machine shop. To the time I saw another guy try and put a piece of paper between the end mill and the material so he could "zero" out his dial. And ended up cutting off the tip of his thumb!!!
Like I've only made 3 small objects on a cnc and the very first thing you learn when learning cnc is to not do anything this guy is doing. Insane facing depths, nothing is clamped tight enough, Far too deep of cuts, no liquid coolant. Who let him near these super expensive machines without training
I actually hate watching cnc crashes, it can sound stupid, but I'm actually affraid it will be hurt. It can be hard to understand by somebody who does not work as cnc machinist. I was lucky that I never destroyed any part of the machine, I always destroyed the tool only.
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
Sorry but you said these mistakes are due to being self taught, but regardless, you made the same mistake so many times. How did you not learn the first time you didn't secure something properly? Or the first time you set your datum wrong. We all make mistakes but holy shit how???
