Building a 4th Axis for my CNC G0704 Milling Machine

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An overview of my new 4th axis for my CNC G0704 milling machine!
Stuff I used (or at least more reliable resources for them)
Mini Lathe Headstock Assembly: littlemachineshop.com/product...
Nema 23 Stepper Motor: www.automationtechnologiesinc...
Stepper Motor Driver:www.automationtechnologiesinc...
Power Supply: www.automationtechnologiesinc...
Tapered Roller Bearings (The Ones I used) amzn.to/2Zz6db8
Tapered Roller Bearings (The Nicer Ones) amzn.to/2VHwPWk
GX16 Connectors: amzn.to/2YZZkR7
120T GT2 Timing Pulley: shop.sdp-si.com/catalog/produc...
20T GT2 Timing Pulley: shop.sdp-si.com/catalog/produc...
Timing Belt Length Calculator: sdp-si.com/eStore/CenterDista...
The Endcap I designed for this slightly larger "NEMA23" (NEMA24?) Stepper Motor: www.thingiverse.com/thing:452...
www.PracticalRenaissance.com
PATREON bit.ly/28X4419
INSTAGRAM bit.ly/1NLu9zv
SUBSCRIBE bit.ly/1OAKcuw
FACEBOOK bit.ly/1YDV3d5
TWITTER bit.ly/1ToGKYm
Camera: amzn.to/2sXCWaq
Microphone: amzn.to/2MpiMOC

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Опубликовано:

26 июл 2024

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Комментарии : 80

@connorbabcock7718 7 месяцев назад

I’m happy I found this! I actually bought a mini lathe headstock for this very reason. I guess I shouldn’t be surprised that someone has done this before 😆

@EZ_shop 4 года назад

Awesome project! Using a mini lathe spindle was a touch of genius.

@wolfitirol8347 4 года назад

Big Respect ....you already build your 4th the same way I wanted to since half a year I have everything here ready to rumble 😎😎 but never started so now this kick in my ad leave me no way to finish this job 🤗🤗👍

@panamericaco Год назад

Genius to use a headstock, why did I not think of that! Great job!

@daleb1225 4 года назад

The music make it impossible to quit watching this video, great video.

@jeroen-surf 4 года назад

Nice video, and great idea to use a mini lathe headstock!

@fierceflyer5 4 года назад

Great, and interesting project Jeff. Thanks

@cruesavage5456 4 года назад

Key in chuck trolls have entered the chat

@darkwinter6028 4 года назад

I’d be especially worried about the rotational velocity of this setup... it might actually drop the key on your foot! 🤪 (seriously though, on a lathe, leaving the key in the chuck is a great way to have it come flying at your head).

@sandboundchris 4 года назад

Nice futurama reference

@calebburnett 4 года назад

I see many custom muzzle devices in your future. ;)

@MarkFunderburk Год назад

Nice Futurama reference

@nline2blast722 4 года назад

Dude you kept your word you were working on a vid.... God bless happy fortj!!

@JBFromOZ 4 года назад

Nice project! Thanks for sharing

@petergamache5368 4 года назад

"This is where I keep various lengths of wire." ... [Subscribed]

@GregsGarage 4 года назад

I can't wait for the next installment where you cut some crazy stuff on it!

@PracticalRenaissance 4 года назад

Already tried a little, can't wait to get some full code posted and parts made!

@anrmanufacturingltd4436 4 года назад

It is great that you have shown your project in such up close detail. Showing the programming behind it and the problems you had along the way is a real insight into how these machines work. You said it took longer than you thought, how would you go about things differently next time you had to do something like this?

@jdacnc2343 Год назад

Great job, I may do this on my DIY CNC'd Sieg SX3 mill!

@RPMechanics 4 года назад

Some really good ideas. Thanks.

@nline2blast722 4 года назад

Great vid love the new ways....

@pikkieduplooy9400 2 года назад

Love the intro!

@_P0tat07_ 4 года назад

I probably would have added some dowel pins to locate the lathe head to the mounting plate. But it’s probably not necessary

@TrPrecisionMachining 4 года назад

very good video..thanks for your time

@Ale_Lab 4 года назад

Great work! I made a 4th axis as well and use Fusion and Mach3. For the CAM fusion supports 4th axis, you only have to give it the 4th axis position in the post-process option (just before you save it). THere are cool tool strategys for 4 axis machining in Fusion, like rotary, that you have to activate it. You can search online how. Regarding Mach3, on top of the pins and motor tuning, you only have to set the A axis or whatever you use as a rotary axis in General configurations. Last step is to set the stock radius, this is important to calculate the feed rate. Fusion will output G93 which is reverse time, so Mach3 needs to know the radius if you want the correct feed rate. The trick I suggest is to set it at the lower value possible, like 0.0001, and set your XYZ0 at the center of the stock. In this way you do not need to set the radius compensation in Mach3 anymore, and leave the 0.0001 value. Happy machining!

@PracticalRenaissance 4 года назад

Great stuff, thanks! I think I have everything in Mach3 set as needed, except for the stock radius, my plan was to output any code for this to have my WCS origin at the center of the stock like you said. I haven't done any full programming yet so I plan on clutching the E-Stop for dear life for the first few runs 😂

@Ale_Lab 4 года назад

@@PracticalRenaissance Perfect, then assign the 4th axis position in Fusion post porcess and set the radius compensation to the lowest value in Mach3 (it's not in the main windows) and it will work out! Looking forward to see it in action. It's actually pretty fun. I have made some herringbone gears as well with it.

@htral 4 года назад

Great vid - ty!

@Shopbuilt 4 года назад

I find the trick with the run from here button it to hit the cancel button when you get the "I'm going to move to this location" pop up and the hit cyle start after that.

@PracticalRenaissance 4 года назад

Awesome tip, thanks! I never hit "cancel" on that pop up dialog because I blindly assumed it would just....cancel, lol

@Ale_Lab 4 года назад

@@PracticalRenaissance yeh, we have been all there. "Run from here" coud have been made a bit more clear. I hit cancel as well and put the feed rate to 10% just to be sure, the speed it back.

@JohnSmith-my6jq 4 года назад

That was something I tried to do myself a while back. but keeping it a lathe for speed as well. So essentially you can switch back and forth. Needless to say my idea flopped and I gave up lol

@billstrahan4791 4 года назад

Nice. Something you might consider is an idler pulley instead is sliding the motor. Then a slightly larger belt and the idler pulley doesn’t just tighten the belt, it changes the engagement with the small pulley. It definitely will increase the holding power of the belt wraps 180 degree around the stepper pulley. If you need more holding than you ended up with, you might consider it

@PracticalRenaissance 4 года назад

Good thought, I hadn't considered increasing the engagement on the motor pulley, it's something I will remember if I run into trouble, thanks!

@HuskyMachining 4 года назад

lol, love your style man

@HuskyMachining 4 года назад

and my box of carbide shame is about 40% 1/8 endmills

@billh308 4 года назад

I am curious how that belt works out. One would think it would have too much flex during milling operations. I have a spare Taig spindle that I think I will attach to a harmonic drive and stepper for zero backlash positioning.

@darkwinter6028 4 года назад

How’s the rotational rigidity of that belt setup? I’m curious as to how much chatter you get, and how aggressive you can be with the cutting forces... 🤔

@dirtboy896 4 года назад

Nice stepper and pully setup. Uses aux axis? Making stuff to make more stuff.

@firearmsstudent 4 года назад

And now I have a new song stuck in my head... ba bum bum ba :D

@17sixty 4 года назад

I see that Saikon.

@zomie1 4 года назад

Have you checked into a harmonic gear drive? I may have a 80:1 laying around.

@KyleBrinkerhoff 4 года назад

Hey man! That's pretty rad 👌 I wanna do this on my x2 but I'd get like 4 inches left on x axis. Hey could you do a vid on motor tuning? Lots of terrible tutorials out there

@PracticalRenaissance 4 года назад

Yes! I intend to do a followup video with the more nitty gritty (boring) stuff that there's not much info about!

@airgunningyup 3 года назад

very well done.. I think the A axis is under motor tuning in config.. I could be wrong as i only have 3 axis..More likley is its arranged like super mario where you have to find the worm holes or the cheat codes to skip 3 levels. The f360 should be interesting , running the simulations and praying it does that in real life. (-'

@Chromevulcan Год назад

Should've gone with green to match the mill.

@TeslaAtoms 3 года назад

Very nice video! Which camera system are you using for filming?

@PracticalRenaissance 3 года назад

Canon EOS T6i thank you!

@shalormckee2784 4 года назад

I want to see more of those assorted lengths of wire. Did you build a space ship with them?

@PracticalRenaissance 4 года назад

I really ought to make a video about the space ship... buuuuuuuutt.... I am already in my pajamas....

@galactica1980 4 года назад

Professor Farnsworth approves

@MaxWattage 4 года назад

I would be interested to know your findings with regard to whether the stepper motor's holding torque and dynamic torque proved sufficient to do (3+1) axis, and full 4-axis machining respectively, or whether and under what circumstances you lost steps and positional accuracy.

@PracticalRenaissance 4 года назад

At first I had more concerns about it than I do after testing it under power, TBH, but will happily report back all of my findings and failings!

@Morkvonork 4 года назад

You can cut in a way that the cutting force is mostly projected into the chuck so the torque is not thaaaaat high.

@timgood4003 Год назад

Did you post the base plate and the stepper mounting plate somewhere?

@hippie-io7225 4 года назад

Enjoyed your video. Excellent work!! If I had my druthers, I would rather hear the sound of your machine while it is cutting,, rather than "music". Part of the learning is hearing the sound of the cut (feeds and speed would be nice too) I won't un-subscribe to your channel, but I have de-subbed others for using music during a technical video. You do good voice-over work,.... no music needed.

@erik.... 4 года назад

That's really nice of you not to unsubscribe because of the music.

@hippie-io7225 4 года назад

@@erik.... My tool maker friend got me hooked on listening to the sound of the cut while the machine is working.. Hard habit to break

@erik.... 4 года назад

A 1:6 ratio will give you 3*6=18Nm at the spindle.. That's around 360N at 50mm from the center.. I have no idea what kind of thrust forces you could get when drilling off center for example, but it seems a bit low to me?

@pablopeu 4 года назад

it is indeed too low, the stepper won't be able to hold the torque correctly while milling, unless of course you make a lot of passes...

@hypnolobster 4 года назад

This would be an extreeemely easy way to build a rotary weld positioner.

@PracticalRenaissance 4 года назад

Well, thats one of the thoughts behind this for future use ;)

@anon58973 4 года назад

Protect future fingers... Lol. Are you getting new ones soon?

@perspectivex 3 года назад

Did you consider angular contact bearings instead of tapered roller bearings? Apparently you can get better precision/less runout with angular contact bearings and I guess for the radial/axial loads you probably will put on it both types will have far and away enough load-bearing capacity. But wondering if you had any thoughts on it.

@MF175mp 2 года назад

Thing is, they're the only good bearing upgrade. They say these are "more stiff" but that's not the bottleneck of stiffness anyway and you can get sealed angular contact bearings. Taper rollers are always open, not for dry systems

@perspectivex 2 года назад

@@MF175mp You're saying angular contact would be better, at least in the case of this 4th axis build?

@MF175mp 2 года назад

@@perspectivex even more on the lathe because the higher rpm there is no good for poorly lubricated taper rollers but there's one more thing, the taper rollers are thicker than original bearings in the axial direction whereas the angular contact ball bearings are all same dimensions as the original regular ball bearings. The bearings will withstand the load and much more.

@perspectivex 2 года назад

@@MF175mp thanks for the clarification. I'm getting the picture after reading a lot that tapered roller = for super heavy slower rpm loads, angular contact = for faster rpm, usually more precise.

@MF175mp 2 года назад

@@perspectivex they both can be super precise if you bought the super precision versions. The taper rollers can take much more load having more surface contact area but that's not really an issue in a sieg headstock at all.

@jescheffler 4 года назад

Was that a hockey puck you used for pressing in the bearing?

@PracticalRenaissance 4 года назад

Yeah I bought a stack of them on amazon a while ago and use them for all sorts of stuff around the shop!

@jescheffler 4 года назад

@@PracticalRenaissance Just making sure my eyes weren't playing tricks :-D

@raystevens687 Месяц назад

Hope you replaced all those plastic gears before you put in to action.

@ryanbrown172 4 года назад

You really shouldn’t ever leave the chuck key in the chuck as seen in the thumbnail. If you ever forget it’s in there and you turn the machine on, it could fly out at you, knocking the wind/teeth out of you.