Thread: Lathe ATC Options?
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09-08-2018 #21
Pneumatic turrets using a hirth or curvic coupling are far sturdier, but as you're aware, they are far more complex (and good hirth/curvic couplings are not cheap!).
They have the benefit that the tool disc gets clamped firmly in place with lots of mating surfaces, whereas on a ratchet and pawl setup, not only do you have flex due to the shaft needing to be able to rotate, you're relying on a single point of contact to resist cutting forces.
And as already mentioned, parting is where you're most likely to notice any play/flex on a lathe.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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06-09-2019 #22
Hello,
our company just released cheap but precise automatic turret tool head for 8 tools. May be great for hobby users!
More informations here: https://www.altaros.cz/en/content/53...ic-turret-head
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06-09-2019 #23
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09-09-2019 #24
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09-09-2019 #25
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12-09-2019 #26
https://photos.app.goo.gl/Yo6VCW2a8KGGR9Tm7
This is the first test of the ATC to check movement and speed. Index's perfectly and can move in both directions to find the closest toolLast edited by Ross77; 12-09-2019 at 10:41 PM. Reason: Corrected bad link
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The Following User Says Thank You to Clive S For This Useful Post:
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31-03-2020 #28
Hi Ross, your toolchanger looks really sturdy. Did you make this to an existing design or is it all new? I would love to make one for my Denford Easiturn as I'm getting fed up changing tools every few minutes!
Best Regards
David
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31-03-2020 #29
Hi David, Thanks, it is rock solid and really happy with it.
Yes it was all designed and built from scratch. It was joint project between me and friend and was a lot of work to get it finished. he had the denford one with the ratchet and pawl design but it wasn't ridged enough so we set about a more industrial option using the Hurth coupling. Most of the DIY ones we looked at had the problem of making the shaft really tight when the Bellville's were compressed to open it and needed a massive stepper to then rotate the tool plate.
Ours works differently and when the Bellville's are compressed the shaft is free to turn by hand and allowed a small nema 17 stepper to spin the plate.
There was talk of doing a small production run of them so I'm not sure if I could post up the plans yet.
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01-04-2020 #30
No worries - I've actually been looking at the same idea for some time but shelved the idea as I couldn't be bothered making the hirth couplings as they can be an arse ache.
My intention was to just use a pneumatic clamp cylinder with a single belleville to aid in the release. Not overly complicated really.
Let me know if you decide to make more as I'd certainly be interested
David
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