CNC Crashes, Breaking Tools, & Outtakes

Crashing CNC machines and breaking tools is a nightmare! The only thing that gets us through is being able to share these with you for a good laugh. This is what happens in a shop with lots of training classes, interns, and tool testing speeds and feeds. If you're having a rough day, pucker up and enjoy. At least you're not alone! #facepalm

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Links for this video

It has been ____ days since I broke a Haimer Tip (Dry Erase Sign)

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Reach us / CNC Info:

[Maltanx]

I LOVE how at 2:34 the dial indicator gets closer to the piece very slowly and then suddenly it starts spinning like crazy.
My favorite clip!

[colesutra]

There's only one thing as dangerous as an inexperienced machinist who's still learning: a competent machinist who's gotten complacent.

[danielstewart]

Dial indicators are apparently consumable items.

[PK-wovo]

These videos make me appreciate good ole’ manual machines



Breaking taps on them feels more personal

[ReactionTime]

I used to watch these and not feel anything. Now that I have my own machine, these fails hurt!

[karlomoharic]

Love the fact that you are not afraid to share your mistakes with the world :) .


But I must say that most of this mistakes are caused by not having proper shop discipline.
This days that is something that often isn't properly covered during initial training.


Here are a few general recommendations for anyone interested:


When using 3d tasters/probes , when you get close to any object ALWAYS put your feed multiplication indicator to the lowest setting, especially if you are going to constantly switch between computer and machine. It's always better to have to make few extra handwheel turns then to break the tip. Also notice that as you break this tips you are also causing damage to the device itself (in terms of calibration).


Learn how to program on the machine using GUI (most machines have them this days). I see a lot of machinist that want to do everything on the computer, but the thing is sometimes that requires a lot of fiddling about. At the same a time lot of things can be easily done directly on the machine using predefined cycles, while at the same time minimizing risk of error do to simple and straightforward way of creating part program. You can also save a lot of time this way.


If you use G-code learn how to create and use point tables.


It's always good idea to have a notebook (no matter how much experience you have) where for a given part you write all the necessary information like: list and order of operations, tools used together with starting feeds and speeds, where will you place your workpoint, dimensions of your stock, ect... Don't be that genius that "remembers everything" and then ends up making a ton of really stupid mistakes. As alternative you can use something like notepad but there is something about having a actual notebook where you can write things down.


User guides and manuals exist with reason . "Real" man don't need them, but smart ones do and we use them all the time.


If you are a younger guy, it pays to listen to advice from an older guy.


Double check your work zero. After you take the zero simply jog the probe into x=0, y=0, z=0 position to check if your zero is were it needs to be.


TRIPLE check your programs (especially clearance distance and feed ) and always run simulation before execution.


If you are making bunch of same parts and you are using rough cut stock (that for example varies in length by a few mm) remember: the SMALLEST stock part is used to make the first part, at the same time dimensions of the LARGEST stock part are used to define your stock part in software.


If you are not sure about speeds , feeds, depth of cut, ect.... remember slower and shallower is better then fast and deep to start with.


When possible test your program on a scrap piece of metal.


Make one part program at the time.


Run one machine at the time, unless you are making a series of parts using an already tested program.


On initial program run, Single Block Mode is your friend.Also if you are the guy that programmed the machine then you know where the tool needs to go,
therefore you should make use of position display on the control.


"I've seen other guys do it " or "It worked the last time" are stupid excuses for stupid ideas.


Every machine has a set of limitations in terms of max rpm, max machining power, max part weight (also take a weight of holding fixture into account), max travel, max tool length, max tool diameter and max tool weight. Learn what they are and abide by them.


A good machinist enforces a shop discipline on himself no matter what, laziness leads to mistakes and mistakes cost money.

[daan]

having worked in a machine shop, and my heart can not take this, everytime it skips 3 beats.

[superdrummergaming]

Note to self: Don't spin up the dial indicators.

[grantlockridge]

The best part is hearing the cursing in the background lol

[mystifiedoni]

Am I bad for immediately thinking how I can save the part?
"Just give it a new face and a suspiciously large chamfer and everything's fine"

[ABASE]

Oooh. Those poor little dial indicators. They didn’t deserve that.

[GregSr]

I've been in CNC drilling and routing of PCB's since 1980 as a field service / applications engineer. I've seen just about every way a machine can destroy a circuit board. Usually, I could figure out what went wrong. The problem I didn't catch right away was the spindle was turning backwards. PCB drilling spindles are 3 phase air bearing motors that spin up to 180, 000 RPM. In this case, the wiring in the connector was incorrect. Depending on the application, some drilling will work even when reversed. The hole quality will be poor and the drill point will wear quickly. Of course, the solution to a reversed rotation is to swap any two of the three phases going to that spindle.

[BroadslideDrift]

2:35 Ahhh running your haimer without coolant... rookie mistake

[xmalandy]

I'm 70. Seen a birds eye view of most of these mishaps. Every time I saw a indicator in this video I knew it was going to be toast. Thanks for sharing NYC CNC.

[Xendrius]

0:52 "why is that tool 32?" shrug, guess we will never know.

[HustleMuscleGhias]

"I lied. I picked the wrong hole." At least I'm not the only one with that problem.

[luke]

My high school has two haas cnc machines and this year I took the CIM class to learn how to use them. Very first time I ran my own code, I sent the bit soaring down into the vice. My instructor simply laughed and said, thanks, I now have a new “do not do this” story😂

[robertsomerville]

Disclaimer : Lots of tools were hurt in the making of this video.

[radchad]

This made me feel a hundred times better about my rookie moments

[nickhartman]

I am new to machining, was part time for about 3 months up until about a week ago, when I accepted a full time offer. Today I made my first mistake: I didn't double check that the vice was clamped tight enough on the part, so of course it went flying and sounded like a gun shot....ended up breaking the tool. I feel so damn bad about this for some reason know mistakes are learning opportunities, but I feel like not clamping down a vice enough is something not even a rookie would do.

However, watching these types of videos at least helps put my mind at ease a bit. I will make damn sure never to let a mistake like this happen again! First job I've ever had that I truly enjoy...maybe that's why I am being so hard on myself. Thank you for posting this video!