Author Topic: My New Ball Turner Won't Turn Balls  (Read 863 times)

Offline snub

  • Full Member
  • ***
  • Posts: 141
  • Country: ca
  • Canada
My New Ball Turner Won't Turn Balls
« on: April 07, 2017, 06:55:06 PM »
They look like an onion, or the roof of the Taj Mahal. I built this after looking at the one that Repton sells. Perhaps there is a design flaw?



Offline mexican jon

  • Full Member
  • ***
  • Posts: 195
  • Country: england
Re: My New Ball Turner Won't Turn Balls
« Reply #1 on: April 07, 2017, 08:34:06 PM »
It looks to me as though you haven't set the distant correctly  :scratch: See attached  :thumbup:
People say you only live once ! I say thank F@*K can't afford to do it twice.

Offline Will_D

  • Sr. Member
  • ****
  • Posts: 484
  • Country: ie
    • National Homebrew Club of Ireland
Re: My New Ball Turner Won't Turn Balls
« Reply #2 on: April 08, 2017, 04:41:17 AM »
The tool tip has to be dead on centre height. If not it turns a conic shape.

That's how you machine aeroplane propeller spinners.

HTH Will
Engineer and Chemist to the NHC.ie
http://www.nationalhomebrewclub.ie/forum/

Offline mexican jon

  • Full Member
  • ***
  • Posts: 195
  • Country: england
Re: My New Ball Turner Won't Turn Balls
« Reply #3 on: April 08, 2017, 04:48:28 AM »
That's how you machine aeroplane propeller spinners.HTH Will

That's what I love about this site  :scratch: :scratch: You learn something new everyday  :nrocks:
People say you only live once ! I say thank F@*K can't afford to do it twice.

Offline Joules

  • Hero Member
  • *****
  • Posts: 877
  • Country: gb
Re: My New Ball Turner Won't Turn Balls
« Reply #4 on: April 08, 2017, 04:54:39 AM »
That would be the Taj Ma Quadcopter then....
Just get doing and make swarf, you can decide what its going to be later.   :thumbup:

Offline snub

  • Full Member
  • ***
  • Posts: 141
  • Country: ca
  • Canada
Re: My New Ball Turner Won't Turn Balls
« Reply #5 on: April 08, 2017, 08:56:44 PM »
Hmmmmm...the center height appears to be spot on. I'm wondering if maybe the cutting tip is not in the same plane as the pivot, if that would cause this. I will fiddle with it some more.

Offline Pete.

  • Hero Member
  • *****
  • Posts: 806
  • Country: gb
Re: My New Ball Turner Won't Turn Balls
« Reply #6 on: April 09, 2017, 02:11:27 AM »
It's simple, the radius you set your tool to swing at has to be the radius of the bar you're cutting. You're tool swing radius is greater.