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Thread: CNC machining

  1. #361
    Unregistered User Permit Roadsailing's Avatar
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    anyne got a CNC lathe care to give me a rough idea how much something like this would cost to make locally?

    https://www.aliexpress.com/item/200-...ceBeautifyAB=3

    no need to thin it down that much. I have a feeling that 8" aluminium rod wouldn't be cheap.

    also how happy will a 10mm wide keyway be on an 8mm wide key?

    and does anyone have access to giant bearing balls? rustier the better.

  2. #362
    Registered User GSRman's Avatar
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    there is no way it would be cheaper than that?
    This is a post i wrote by mistake, which is nice...

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  3. #363
    Defective Faux Forg's Avatar
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    Why does it need to be a CNC lathe?
    Quote Originally Posted by Marlin
    Chickens will slip under water in the cover of darkness like a seal team and FUCK YOU UP.

  4. #364
    Unregistered User Permit Roadsailing's Avatar
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    Quote Originally Posted by Faux Forg View Post
    Why does it need to be a CNC lathe?
    Oh it doesn't but we don't have an Operator Handerical Controlled machining thread.

    Might go half way and buy a rubber tyred one and get an adapter made as none of them have the centrebore I want.

  5. #365
    Ease Up Turbo Commotion's Avatar
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    The mill arrived today. Gets wired up Monday.
    Click image for larger version. 

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    A mate gave me an old hercus desktop mill. Controls were wrecked but I have been retrofitting a centroid acorn control and ac servos. Got it all up and running tonight for first time with spindle. Just using China VFD and lil 3ph motor I had laying around.
    Click image for larger version. 

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  6. #366
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    Your mate gave you a mill?!!

    What made you choose that control?

  7. #367
    Ease Up Turbo Commotion's Avatar
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    Yeah. He also gave me a desktop lathe of the same brand. He is a school tech teacher and a little bit of a hoarder so when ever the school goes to throw stuff out he takes it home. He had a bunch of them but needed room for some house Renoís.

    I have been researching cnc controls for a while as I have been wanting to design and build my own. The acorn board has only been available for a couple months but runs off their same control software they use on full size professional machines. The only other options I found were mach3 and a generic break out board or Arduino and grbl shield but by all accounts this now acorn board and software is a game changer. So far itís been simple to setup and functions well. Even created code from fusion and plugged it straight in.

    Hereís the bits in the cabinet
    Click image for larger version. 

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    And the control software with a path I created in fusion
    Click image for larger version. 

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  8. #368
    Chopped BigMuz's Avatar
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    That's awesome man.
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  9. #369
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    Yeah they look like they know what they are doing.

    http://www.centroidcnc.com

  10. #370
    Gas Turbine enthusiast da9jeff's Avatar
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    Fuck me a free hercus cnc lathe and mill. Would love either. These days hercus is just a machining shop.

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  11. #371
    Ease Up Turbo Commotion's Avatar
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    Powered up the lathe and found one of the servo drives is not working. Unfortunately the drives are all proprietary stuff so no finding spares. Blowing drives is why the mill was discarded in the first place. The old man had a little poke around with it and thinks a diode on itís no good so will try replacing that to see if it fixes it. If not it will have to wait till I get around to getting new drives and another acorn board for it.

  12. #372
    Unregistered User Permit Roadsailing's Avatar
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    Quote Originally Posted by Commotion View Post
    Powered up the lathe and found one of the servo drives is not working. Unfortunately the drives are all proprietary stuff so no finding spares. Blowing drives is why the mill was discarded in the first place. The old man had a little poke around with it and thinks a diode on itís no good so will try replacing that to see if it fixes it. If not it will have to wait till I get around to getting new drives and another acorn board for it.
    shirley they are just some kind of NEMA standard thing? if the diode fixes it, great, if the drop in replacement works and isn't too expensive that's great too.

    this was kinda interesting,



    surprised the end product only costs 440 loonies.

  13. #373
    Ease Up Turbo Commotion's Avatar
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    Something I have been working on with the new machine. Itís taken some iterations to tool paths to get cycle times down and finishes better. I destroyed a number of tools which is getting expensive but I can only imagine what someone would have charged me to machine these for me.

    Click image for larger version. 

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  14. #374
    Registered User tc josh's Avatar
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    Looking good mate

  15. #375
    Ease Up Turbo Commotion's Avatar
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    Cheers, some more progress. I accomplished my first thread milling on the larger bases. Also more tweaking and I think I have gotten the best surface finish possible with this machine. Finished my first top cap.

    Click image for larger version. 

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  16. #376
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    What are they for commotion? Look great.

  17. #377
    Ease Up Turbo Commotion's Avatar
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    Itís a prototype cylinder mount. Kind of like a trunnion mount but allowing lateral movement of the rod. I have done fea on the design and there is plenty of margin in the strength of it but the big unknown will be the wear life. With the mesh size needed to solve the analysis in a reasonable time frame it doesnít really give the best resolution for contact pressures. I had the inner rings hardened but they couldnít get the hardness I was hoping for. Just have to suck it and see.

  18. #378
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    Nice, good work, like to see people trying new designs.

  19. #379
    Down with ma homies Greg Rust's Avatar
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    Is there a grease purge for the trunion?
    xw Falcon 393 full race cam, NGK spark plugs.

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  20. #380
    Chopped BigMuz's Avatar
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    Mint, threads look really nice.
    Retard Honour Wall.
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    Quote Originally Posted by Fondles
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  21. #381
    Ease Up Turbo Commotion's Avatar
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    Quote Originally Posted by Greg Rust View Post
    Is there a grease purge for the trunion?
    Yep. Thatís what the counter bored hole in the middle of the top cap is for. The hole in the bottom part is for a dowel pin which sits in a slot in the spherical ring to stop rotation.

  22. #382
    Ease Up Turbo Commotion's Avatar
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    Quote Originally Posted by BigMuz View Post
    Mint, threads look really nice.
    I was stoked with it. Much nicer than a tapped thread. I had broken a bunch of tools doing these parts so was very nervous about doing the thread milling. The tool was about $300 and I only ordered 1 so I didnít want to break it.

  23. #383
    Gas Turbine enthusiast da9jeff's Avatar
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    Assume its form threading?

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  24. #384
    Down with ma homies Greg Rust's Avatar
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    Quote Originally Posted by Commotion View Post
    Yep. Thatís what the counter bored hole in the middle of the top cap is for. The hole in the bottom part is for a dowel pin which sits in a slot in the spherical ring to stop rotation.
    Excellent. Iíll can you a design of a rotary shaft seal we have thatís very similar to that, weíve added some Orings at each end where the grease can purge past to prevent dirt ingress. If youíre interested
    xw Falcon 393 full race cam, NGK spark plugs.

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  25. #385
    V4 Goodness Kris's Avatar
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    Hi Guys

    Can any of you cluey bastards remake this part for me?

    One circled


  26. #386
    Non Compos Mentos Gammaboy's Avatar
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    Go talk to Ben at Extreme Creations.
    "Where can we get hold of a Vincent Black Shadow?" "Whats that?" "A fantastic bike," I said. "The new model is something like two thousand cubic inches, developing two hundred brake-horsepower at four thousand revolutions per minute on a magnesium frame with two styrofoam seats and a total curb weight of exactly two hundred pounds."

  27. #387
    V4 Goodness Kris's Avatar
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    Quote Originally Posted by Gammaboy View Post
    Go talk to Ben at Extreme Creations.
    Good point, forgot about Ben! used him before

  28. #388
    V4 Goodness Kris's Avatar
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    Ben can't do it, tools are booked out for months.

  29. #389
    Non Compos Mentos Gammaboy's Avatar
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    Will it fit the current model Tuono (V4)? Old workmate of mine has both a Tuono and a CNC shop - but he's in the UK.
    Would be right up his alley.
    http://technicaltooling.co.uk/
    Last edited by Gammaboy; 13-03-18 at 02:53 PM.
    "Where can we get hold of a Vincent Black Shadow?" "Whats that?" "A fantastic bike," I said. "The new model is something like two thousand cubic inches, developing two hundred brake-horsepower at four thousand revolutions per minute on a magnesium frame with two styrofoam seats and a total curb weight of exactly two hundred pounds."

  30. #390
    Non Compos Mentos Gammaboy's Avatar
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    How's it need to be different from stock?
    "Where can we get hold of a Vincent Black Shadow?" "Whats that?" "A fantastic bike," I said. "The new model is something like two thousand cubic inches, developing two hundred brake-horsepower at four thousand revolutions per minute on a magnesium frame with two styrofoam seats and a total curb weight of exactly two hundred pounds."

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