Thread: How Stupid was that, lets have a laugh

Not that I have ever done it but I have a friend that ...........

My usual thing is to change a cutter over and forget to reset the Z axis. Murphys law or is that Morphys Law of CNC states that the new tool will always hang out more than the last one did. You know the result of this one.

As an aside I like the challenge of being able to fix the job that is ruined but most times the answer to that is make a new piece.

Ok yesterday as I was finishing a job I was standing at the ends of the table marveling at my design and that the router was completing.

It just stopped three cuts from the end two hrs had passed I was getting excited Emergency Estop activated what! why I haven't had one of those in such a long time why why I think to myself it was nearly done I restart it in the wrong place and it cuts straight through the face .


So I go looking for the problem spend an hour looking for it puling wire checking that the router is ground keep looking at the fluro lights thinking about Rod and others problems na it wasn't turned on so it cant be that what bloody gremlin caused this.
Another hour passes and my dear wife comes out with a coffee she sees the pain on my face and asks what's wrong and at that very moment I worked it out.


I was standing at the top end of my machine leaning on it with my arms bit like an A frame yes you guess it I touched the bloody Limit switch what a bloody fool.


I just said to the wife operator error strikes again and sat of the floor laughing at my stupidity.


For my sanity the CNC Studio is closed until Sunday.

Damn that would make you a little annoyed.

I have never done it but I know somebody that loosened the collet on a finished job and the cutter dropped out onto the polished surface. That person now uses a piece of board under the cutter if I remember - sorry they remember.

My mistakes get quietly taken and hidden in the woodpile or the bin.

Furtively looking around to see if anybody saw my stupidity.

Had a job the other day which I had taken some time to prepare the material. Vee-carving text onto a cylinder.

You can imagine my consternation when the text started appearing backwards.

Fortunately this job just became a little shorter than planed.

Greg

Nice work Greg. You have certainly got a handle on the 4th axis stuff.

Originally Posted by rodm

Nice work Greg. You have certainly got a handle on the 4th axis stuff.

And being able to do it backwards as well .

I built the kitchen table. Now I built it to match the dining table so we could butt them together and have a very big Xmas table etc. Anyway got the whole thing together and for some reason it didnt look right so back to measuring. For some unknown reason it was exactly 10cm narrow. took a few days before I could get around to ripping along a joint and pulling the frame apart.

There's this bloke about my shape and size who has set job zero in the centre of the job in V Carve and set his cnc machine zero at the bottom left corner of the perfect piece of timber for that special one off job

Best training I ever had.................

Gidday rrobor
The old 100mm rule will getya every time.

Done that one too Gary

He is mine for the day.
Remember I set up a new computer with fresh version of Windows and Mach3 software to go with the new Console.
Ok ran my first job today and in the middle of the job the machine stopped. Had to restart Mach3 and set up again. Ran it again and it stopped in the same place. Checked the Gcode and there was nothing there that could have casued it.
Ran it again and it stopped in the same place.
Then I noticed it had stopped on line 497.
See who can work that one out.


.

You were using the demo version of Mach?

Yes I had forgottten to copy my license over.

Theres some really good stories that come out in these circumstances.

I've done the silly one where on a new install of the cam program i hadn't reset the default value of the safe z height(original default is about 10mm). Well, while running the job, everything was fine....until the very end rapid return to the home 0,0 co-ords. It took a very direct path, as it does and unfortunately one of my aluminum clamps was in the way...thank goodness for estops. Never the less i did, for the first and only time, see my machine take a 5-10mm cut into aluminum. lol.

Like rod said, Morphys law of cnc... The worst/more damaging thing to hit, will always be the first thing we hit. Just proves to me i really need to look at a vacuum table.

Daniel
P.S Oh, by the way, i can say, i always check the default value and i have never hit a clamp since.

Last oops I had was after deciding to tune my servo's up a little (that didn't really need any more tuning). I use EMC and it has a little milling file it loads at the start by default that just engraves EMC AXIS, i have used it a hundred times to test the machine.

Unfortunately this time I hadn't homed the machine so it didn't really know where it was, I hit the run button and before my eyes the router plunged into the table then started to run the g-Code, worst part was that the spindle was turned off as I was only testing the servo's.

Result was a broken (brand new) 60 deg router bit, a wonky Z axis, a deep gouge in the table and a very bruised ego. The worst part is that the bit was recently given to me by a mate that had borrowed one of mine very similar and accidentally dropped it on a concrete floor, snapping the tip, he had bought this new one to replace my broken one and I was setting it up for the first time use...it was one of those really nice and expensive carbitool 60Deg bits.

*sigh

Russell.

Best one so far for me was turning my spindle into a 24k rpm whipper snipper the alu block just missed my head my dogs reflexes were way better they were gone the three of them were hiding under the bed for hours lol.

I have eluded to this before in another post I left the alligator clip on the spindle after zeroing out the Z axis , silly silly silly man all the wife could say thank god she didn't see the dent in the wall it made.