CNC Lathe

[cocksparrows]

get a cut on man. you will be there all day

[PooPusher007]

you should have the tip closer to the tool post & get a center up the workpiece

[adisharr]

I found this video to be rather boring OMGLOLOLololol!!!1111

[1lumek]

A boring bar can be used as an outside and inside tool. With an 80 degree rombic plate its possible to work inside and planar. And with reverse spindel rotation its possible to turn outside as well, as long as the bar allowes. But it needs enought X- travel of course.

You just program the X axis with a - sign.

Good work.

[darkcover09]

Job shop owners and machine tool operators will be talking about this new CNC from Siemens.

The CNC EyeTeam has just broken the story. Ive copied their news video on my YouTube page.

[trkica]

smesno...

[ydna2]

The effective differences between a boring bar and a regular OD turning insert are....uhh, nothing.

[patricksheehan08]

I agree, a cutting tool is a cutting tool, a good machinist makes it work

[terrygraham1967]

Hell I dont know why you all are so concerned about turning the OD with a boring bar I have used one as a substitute for a fly cutter in a pinch while milling on the lathe lol

[gerjaison]

What's wrong with ScubaSteveM45? So negative and arrogance?

Who said CNC had to be rapid? It is computer control regardless. If you are a home workshop, using stepper motor is the most ideal solutions!!

Anyway Payala, its good work. Which lathe model do you own? I'm thinking of retrofitting mine as well. Do you also have DRO fitted?

Did you replace leadscrew with ballscrews?

[kawasakikillerr]

wow. lovin the ghetto tooling. thats how we do it!

[frits2345]

Nice video

Good job with that boring-bar.

[payala]

Thanks, it's funny how everybody has noticed that I was using a boring bar. In a home workshop, sometimes, tools have to be used for tasks other than the ones they were designed for....

This video actually doesn't do much justice to the whole system. Depth of cut is very shallow, since I was doing some tests... I should post a video with the machine doing some tough turning.

Thank you!

[r0cd0x]

why are you using a boring bar for that?

[marnerod]

It is very nice Ineed more information about cnc for my job, I am a techers. Thankyou.

[fballman91]

be nice

[paul30003]

I set a Hardinge GT SP fast and repeatable to a .0001" we have a Haas as well not so quick but good for large stock

[Dasinnereich]

This is CNC, and not NC. Check out CNC on wikipedia.

I have both a CNC lathe and mill which I have converted myself. The reason for it being so slow is the limitations of a homemade system. With servos you can get some preatty good rapids, but generally you will get more on a more professional machine.

And we do call it CNC in Denmark too (Jeg ved det sgu godt fordi jeg arbejder med disse maskinerne hver eneste dag). NC machines are a different thing.

[kawasakikillerr]

i do like the boring bar. lol

[jeff100xr]

its called a nc lathe.its before the cnc came along thats why its slower.yea its ood they are using a boring bar for it.

[payala]

You can call it whatever you want, it simply is a manual lathe with servo motors attached, and servo controllers powering the motors and receiving commands from a computer. If I had to, I would classify it as a home cnc lathe(it really is Numerically Controlled from a Computer).

The boring bar is just there becuse my normal turning inserts were unusable at the moment, and I wanted to make a test as soon as possible ( I was really excited to see it working, since I made it all miself).

[payala]

The speed is so slow and depth of cut is so shallow because it was my first test, and I didn´t want to push the limits. but i have achieved perhaps 2x-3x more speed and 5x bigger depth of cut.

[d1westi]

pretty slow cnc machine

[milwaukee69]

Yeah and it looks like they're using a boring bar for turning.

[delacerdaa]

I`m taking a 5 months CNC course I hope I learn this stuff I making it my career

[JamesEarlCash]

i heard it can be mastered in two months ;)

[EDO264]

Yeah mate i run a okuma LB300M which is a sort of modern lathe and all u have to do is learn how to cover everything in the tool data and parameters. Programming is easy its the other stuff that can bring u undone if u dont know what your doing. Id say less than 2 months if u pay attention

[rarelasse]

the missing ballscrew isn´t that much of a problem if you make the program cut the same way all the time, this eliminates the backlash and the parts you turn will look as nice as parts from a "real" cnc lathe.

About the name i think it´s called a nc lathe, or at least we call it so here in Denmark.

[payala]

Of course, when you turn in a manual lathe that's the technique you have to use to compensate backlash. However, i have found that it is not easy to make the CAM program automatically generate toolpaths that make the tool advance always in the same direction (most important for X axis).

[shimric20]

Thats a really easy program....

[ResidentPhysco]

i would really like to know how u did this, like what program you used etc. because i cant find a website for this

[JTMarlin8]

ScubaSteve, the only person who will be screwing us guys is your mother. She happens to know more about manufacturing technology than you do, and she's a call girl by trade. Getting back on topic, there's nothing wrong with converting a manual machine to CNC. Combine "economics" with "home shop machinist" and that's what you get.

[ScubaSteveM45]

Screw you guys, I didn't claim to be an expert authority on machining. However adding NC controls onto a manual lathe seems to me to make as much sense as modding a Ford Model T with a nitrous system and a carbon fiber hood.

[mdmf007]

Maybe its because thats what he had on hand???? why kick him in the balls? hes not turning out fan blades for a GE turbine? or critical parts so what a few thousandths? later

[chuchon81]

oh i see, just asking

[chuchon81]

why are you using a boring bar to turn an O.D.???

[payala]

Because in that moment it was the only tool with an insert that had less than 90º. The tool that I should have used had the insert broken.

I tested it, and since it cut whithout chatter I continued with it taking light cuts.

[lucky777s]

Yes, please post some of your homebrew techniques. Oh, and whoever said that anything is possible with a manual lathe, try to make a sophisticated mathematically correct smooth curve using a manual lathe. Oh, and every duplicate part has to be within ten thou. I need to make a part every 30 seconds as well.

[denbyman]

Nice job! I was a machinist for the US Navy for 7 years and have been an Aviation Electronics Technician for another 7 years and I just have to say Scuba Steve is a DORQUE! I have forgotten more about machining than he'll ever know. Ultimately, CNC means you don't have to touch the damn thing after set up because a microprocessor is following predetermined instructions. Is there a place that WE can go to see how you designed this setup?

[payala]

Well, right now there isn't such a place. Actually, this video was to test youtube, but I'm going to have to think about setting up a web page, because several persons have asked for that same info. Thanks for the comment, it is very motivating for me ;)

[fballman91]

GO Navy MR2 Nannie

[ScubaSteveM45]

Dude stop clowning! That is a MANUAL lathe. A MANUAL one. I know because I am studying machining at college and I work on a manual lathe every day. Even if you could create some sort of NC control it would make a poor add on to a manual lathe as manual lathes have an open design and usually cannot run at the higher RPMs most purpose built CNC lathes and mills run at.

[payala]

I didn't mean to offend you. It is true that it is not an industrial CNC lathe, it is a manual lathe retrofitted with electronics which allow a PC to control its movement via servos. It is not true that its main drawback is the lack of speed, it's main drawback is not having an automatic tool changer.

Perhaps the title isn't very well chosen, what I wanted to illustrate, is how I have converted my manual lathe to CNC in order to be able to turn parts which are not possible in a manual lathe.

[exodus989]

All parts are possible with a manual lathe ;)

But it is a CNC lathe none-the-less. Computer Numerically Controlled. Scuba, know your shit. I'm 16, in high school, and I know more about it than you.

[toastydeath]

There are 10k-20k rpm manual machines. Control scheme doesn't affect machine parameters. Backlash is a bigger concern, as you cannot preform contour work accurately with backlash. You can replace the leadscrews with ballscrews to fix that. I not only study under a tool and die maker, I also have a job machining. I suggest you learn more about machine design before making more absurd claims.

[buggable]

True - main problem is the missing ballscrew. At my workplace we have a "semi CNC". No automatic tool change but CNC control.