School limited my feeds and speeds, though partially because I'm not using coolant so I can film this. The initial groove is there because grooving without coolant is a big no-no.
The work on this is beyond words. As a novice Cnc op. How he touches off the chuck to pass over air before the rough cutting begins ending at a light caress finish that leads to an almost water marked mark to end the program with a thread psÿcl amazes me all without coolant and almost tattoo like style, my hat is off to you good sir.🙏🏽
When we did this in our school the professor was right there over our head to watch us. But it is a try, from a student, who can be better tomorrow if he tries. No need to judje him. Because when all you started this job you didnt knew a shit !
I knew it all just ask me. I was God's gift to apprenticeship and I thought so. Shaking my head. I think Bob Seeger said it best "wish I didn't know then what I don't know now." Arrogant little prick.
We have some haas CNC in school too, but I did not know mechanical engineering student can use it until few weeks ago, since these fancy stuffs are in aerospace school building. I only used manual lathe in this semester, this part could take me a month using the manual lathe. Definitely make works much easier!!!!
Quick code on a haas lathe makes them one of the easiest machines to operate. I used to run one of these and it was by far the best thing since sliced bread
You're learning. I've taken a class as well and had a teacher not qualified. Im lucky to have a machinist that's willing to help my mistakes. Hope you find one too.
yes it's a cult ritualistic ceremony called ghosting.. you do it when you want to give a big fuck you to your company or boss and are thereby accepted into the human shit pile of lazy inefficient garbage
Most insert packets have recommended speeds and feeds on them. Your SFM looks good in most of the videos, but your feedrate for roughing is way too high and your DoC is too low on almost everything, but especially on finishing. The result is poor tool life.
vitsou1 That was my first thought as well. You can see it immediately in the finish. I'm still pretty new at this myself though, so I may be talking nonsense. lol.
"Practice" makes you better. Try different Vc and ap vs feeds. When your tool makes sparks then it will brake soon. Try Vc 180, ap 2 - 2. and feed 0.2 - 0.25 for roughing. Though it's brass, these settings work fine with me in mild steel
Cool video, keep it up, You just need to learn the Canned cycles, specially G71. The only criticism I have is that around the 5 minute mark you took a skim cut and that's a no no since it wears out the tool a lot faster and you also kissed the chuck a bit but then again you're in the process of learning so GOOD JOB ^_^ As for Doug, you see he was born knowing everything, He never went to school or had to pick up a book or learn a thing.
We learn through mistakes and gain experience at the same time. You didn't crash that matters more than the part. Finish of the part can be better but just keep trying there bud!
A lot of times it not uncommon to brush the jaws of the chuck do to inertia from the jaws clamping force. If the jaws are properly turned this is not an issue. But with raw stock being what it is, occasionally jaw flex can occur. Now close/clamp jaws shut & Run an indicator across each face and chances are they’ll all be out a very small amount. Now spin that chuck at 3000 rpm, and rotational mass takes that to a whole new level. Not to mention this is a student learning here and we all have crash a tool, myself included. Ive been a CNC machinist 39 yrs. that’s called learning.
Just wanted to say that after reading all these comments I wonder how you ever dared to put an other video online? Don't get discouraged, your still in school so don't mind what other people tell you to do, at least you are learning a trade that can get you somewhere, I'm in Europe so It's a bit far I think but I'd hire you I'm sure after a few weeks in our company you'd do things like this with your eyes closed! I myself never had the chance to learn CNC programing, when I went to school it was all conventional milling and turning however when I got out of school I continued the conventional way for a while and bought my first Haas CNC (Super Mini Mill 2) when I was 25 after working in some small company's I decided I could do this work myself! so a year later I bought an ST10 and went on form there, in a few weeks I'll be getting mu new VM-3 so I didn't know s*** about CNC programming and now I work full time for the automotive industries as well as many other sectors! I'm 32 now and in just 5 years I have gone from not knowing simple G code to operating small and large CNC mills, lathes, Wire EDM, Sinker EDM, CNC grinding etc... So no mater what you learn in school it's what you do afterwards that counts and how much effort you will invest! Don't give any attention to what other people say to bring you down, chances are at one point or another they will always bump into someone that is way smarter than they are, but then again I don't think those people would acknowledge it!
+Kurt Bleyweert crazy right! I get 2 or 3 messages daily with people calling me stupid! It doesn't bother me tho, I was in school, now I'm workin. Not only do I enjoy it, and have gotten better, but it's also caused me to believe a lot of my replies aren't actually machinists!
Have they shown you how to use a dti yet? XD would have made the groove concentricity a lot better. good start though looks like you're learning a lot :)
Ok.. as a lathe programmer this hurts my head, why on the end contour (radii) didn't you use a G71? Why all the air cuts? Why were there two finish passes (second of which did NOTHING!) I'm going to program and run this this week in spare time... watch for it
I'm pretty new at this as well, so take my comments with a grain of salt. And if any old timers on here want to correct me, please do. It does look like the feed is too high for the speed. If the school set your max, you probably still would have wanted to reduce your feed to compensate for the lower speed. It also looked like it was wobbling kind of a lot at the beginning. Yeah, turning will take care of most of that, but if there's a tight tolerance on run out, I don't think you'll get less than .001 on that. If they don't care then I guess that's fine. No point in indicating if that's not an important feature. But since it's a school project I would assume they wanted something like that. So I guess my question is, did you indicate the stock when you put it in, or am I just seeing things?
needs a center drilled hole with a tail stock the thing is moving all over the place. That would also allow for greater depth of cuts and better finish...that machine cuts air really well though....lol
Ideally I would agree that the part needs a centre but for aesthetics! No there shouldn't be. And with the cutting of the air.... The program was set to stock diameter which would produce a fully finished shoulder taking in to consideration that the part was previously ran of course he's going to be cutting air with the small depths of cuts he's making. Does anybody in the comments section here have any ability of foresight to see why the part was produced like this?? Lol
Good Video. Dont get discouraged by idiots. We all started off not knowing anything. Hey you didn't crash the machine so you're doing ok lol. google a feeds and speeds calculator and go based off the manufacturers specs.
Me doy cuenta que al principio cuando desvasta el que programo hizo codigos inecesarios ya que no tocaba el cortador con la pieza Pero eso no es tan importante aun asi hizo un bien trabajo
It looks like your work offset was set in front of your part .100 or so, I guess its a good thing or it would be another lathe crash video. I'm glad to see kids trying to do something other than invent some stupid APP.
Skyler Atkinson Just curious, what was your sfm set at and what was your feed rate? The material you're using is a mild steel if I'm not mistaken, so larger roughing cuts would not have been a problem while cutting dry, by taking multiple light cuts you're not allowing for proper heat dissipation. I'm also wondering why the finishing tool was starting way off the part when machining the front face, I'm guessing wrong offset? What level school are you attending? Not trying to be condescending, just curious. :)
I take that for the purpose of video shooting there is no coolant. If you apply even minimum coolant, there isn't much to see of the actual turning as you can only see that spray from the coolant. It seems that feed rates are pretty good so that most of the heat is put on the chip (yellow chip) apart for few passes on Z-direction (purple chip). Sure, carbide inserts do not have as much of life as with fully cooled turning, but for the sake of the video it seems like pretty good trade-off.
roughing part hurt my heart and my soul everytime that insert entered the part. Feedrate way too high, dept of cut way too low. I wouldn't risk a tool only to be able to film it tbh.
Ideally, it would have a greater DOC with less feed. Overall not too bad, gotta start somewhere. Your radial depth should never be less than you tool nose radius, generally speaking.
Can I have your real name please and what school you are going to? I want to make sure I never hire you or any of the students that go through this "training".
+Doug Hanchard Not interested in getting hired by some fat diabetic. Looking for real employment, not someone who's a walking billboard advertising a lack of self-discipline. Thanks
STGvHaaren1 the sudden harsh starts and stops, rapids to nowhere are hard on the machine. Thats the difference between an owner and an operator i guess.
Hey guy, im a german machining mechanic ( Zerspanungsmechaniker ). First it is not a bad Programm for a prototyp part or for a teaching example but in a series production u will never become much success with that many air cuts and the horrible finishing process.
Hey guy!!!!! It is a bad program!!! A simple turning G71? G72? Or is it G70? Canned cycle will work way better than this morons program!! I would fire him right away! Or make sure he's not making more than 16/h cause that's about all you would make in my world!
