Author Topic: Coax Indicator, designed by W.K.Todd  (Read 2617 times)

Offline fumopuc

  • Full Member
  • ****
  • Posts: 2300
  • Munich, Germany, EU
Re: Coax Indicator, designed by W.K.Todd
« Reply #30 on: December 19, 2018, 04:02:40 PM »
Hi Bill,
thanks for your friendly advice, but if the bad and lazy maker of this build has a run out in his shaft surfaces already, than polishing will not help.


I have measured the conical surface of the shaft against the outer diameter again, and there is the problem and it will stay.


So I made a new shaft and everything is fine now.




Bill thank you very much for the design and the drawings.
« Last Edit: December 19, 2018, 05:42:03 PM by fumopuc »
Kind Regards
Achim

Offline b.lindsey

  • Global Moderator
  • Full Member
  • *****
  • Posts: 13128
  • Dallas, NC, USA
    • Workbench-Miniatures
Re: Coax Indicator, designed by W.K.Todd
« Reply #31 on: December 19, 2018, 04:36:04 PM »
Well done Achim, and a great video showing it in use too.

Bill

Offline BillTodd

  • Full Member
  • ****
  • Posts: 422
  • Colchester UK (where the lathes were made)
    • Bill's website
Re: Coax Indicator, designed by W.K.Todd
« Reply #32 on: December 19, 2018, 08:51:19 PM »
Great job Achim  :cheers:
Bill
wy omnibus Latinis taurus stercore?

Offline kvom

  • Full Member
  • ****
  • Posts: 1867
Re: Coax Indicator, designed by W.K.Todd
« Reply #33 on: December 20, 2018, 11:12:29 AM »
Where do you find the attachment "bars"?  I have the SPI unit, but I'd like a bit wider selection of lengths.

Offline fumopuc

  • Full Member
  • ****
  • Posts: 2300
  • Munich, Germany, EU
Re: Coax Indicator, designed by W.K.Todd
« Reply #34 on: December 20, 2018, 11:47:33 AM »
Hi Kirk,
here a picture of my Chinese Version of the purchased CI.
The six bars/probes has been part of the delivered set.
Since this morning they do have a smaller brother.
I have made it by a short piece of SS and a 3 mm titanium ball with M 1,6 already in it.
The ball was available in in our local Piercing Studio, down the road.
Last picture shows the whole benefit in Z-hight now.
Kind Regards
Achim

Offline Vixen

  • Full Member
  • ****
  • Posts: 1077
  • Hampshire UK
Re: Coax Indicator, designed by W.K.Todd
« Reply #35 on: December 20, 2018, 12:01:44 PM »
I have made it by a short piece of SS and a 3 mm titanium ball with M 1,6 already in it.
The ball was available in in our local Piercing Studio, down the road.

Brilliant idea Achim. An engineer will always find a way.  :ThumbsUp: :ThumbsUp:

Make sure it is a new and unused titanium ball, it's amazing what parts, some people have pierced  :censored: :censored:

Mike
« Last Edit: December 20, 2018, 06:01:14 PM by Vixen »
It is the journey that matters, not the destination

Offline fumopuc

  • Full Member
  • ****
  • Posts: 2300
  • Munich, Germany, EU
Re: Coax Indicator, designed by W.K.Todd
« Reply #36 on: December 20, 2018, 06:07:41 PM »
I have made it by a short piece of SS and a 3 mm titanium ball with M 1,6 already in it.
The ball was available in in our local Piercing Studio, down the road.

Brilliant idea Achim. An engineer will always find a way.  :ThumbsUp: :ThumbsUp:

Make sure it is a new and unused titanium ball, it's amazing what parts, some people have pierced  :censored: :censored:

Mike


Hi Mike, no worries, the ball and the bar has been washed in acetone before the assembly.
Kind Regards
Achim

Offline BillTodd

  • Full Member
  • ****
  • Posts: 422
  • Colchester UK (where the lathes were made)
    • Bill's website
Re: Coax Indicator, designed by W.K.Todd
« Reply #37 on: December 20, 2018, 07:32:07 PM »

Hi Mike, no worries, the ball and the bar has been washed in acetone before the assembly.

BTDT  - stung like a b######d :censored:
Bill
wy omnibus Latinis taurus stercore?

Offline Vixen

  • Full Member
  • ****
  • Posts: 1077
  • Hampshire UK
Re: Coax Indicator, designed by W.K.Todd
« Reply #38 on: December 20, 2018, 07:42:14 PM »

Hi Mike, no worries, the ball and the bar has been washed in acetone before the assembly.

BTDT  - stung like a b######d :censored:

Ha ha. Acetone....a wise precaution. But it only stings if you were to use it for it's original intended purpose.

I have a Renishaw digitising probe which I use for edge finding and for centre finding. It uses a 3mm diameter ruby at the tip of the probe's stylus . They are  very expensive to replace, if (or when) you crash the probe. I can now use your brilliant idea of a 3mm titanium ball to make my own replacement probe styli.

It's kind of interesting that both Renishaw and the body piercing industry both use the same M1.6 threads.

Mike
« Last Edit: December 20, 2018, 09:29:10 PM by Vixen »
It is the journey that matters, not the destination

Online Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 12191
  • Hampshire, england.
Re: Coax Indicator, designed by W.K.Todd
« Reply #39 on: December 20, 2018, 08:03:09 PM »

Hi Mike, no worries, the ball and the bar has been washed in acetone before the assembly.

BTDT  - stung like a b######d :censored:

Ha ha. Acetone....a wise precaution. But it only stings if you were to use it for it's original intended purpose.

I seem to recall Mrs Meldrew used Tabasco sauce on Victor 1.

Jo


Ref 1. Series 5, Episode 3 of One foot in the Grave .. last scene  ::)
Usus est optimum magister

Offline Dave Otto

  • Full Member
  • *****
  • Posts: 3531
  • Boise, Idaho USA
    • Photo Bucket
Re: Coax Indicator, designed by W.K.Todd
« Reply #40 on: December 20, 2018, 09:21:31 PM »
Where do you find the attachment "bars"?  I have the SPI unit, but I'd like a bit wider selection of lengths.

Long Island has the contact points that fit the Blake, but their not cheap.

http://www.longislandindicator.com/p110.html

Dave


Offline petertha

  • Full Member
  • ****
  • Posts: 271
Re: Coax Indicator, designed by W.K.Todd
« Reply #41 on: December 22, 2018, 05:23:36 PM »
The compact design is very nice indeed. One thing I wanted to ask on these co-ax devices - is it considered OK to rest the ball inside a countersunk hole & do the spinning centering operation that way? In other words finding the center of the countersink? For normal centering I use a DTI just hand rotating around bore holes or circular bosses. The DTI arm is free to pivot confined to its single motion plane & you read the dial at different opposing positions, no rocket science there. But I think the only way I could measure a center drill pip is orient DTI into X position, lightly lower so the ball ts fully in the drill cone, raise, then repeat in in Y direction. That's a pain. I thought maybe co-ax could do this under power rotation by just resting the ball in the cone. However, now its constrained in the vertical direction. So would that bugger up the movement or give false reading?

Offline BillTodd

  • Full Member
  • ****
  • Posts: 422
  • Colchester UK (where the lathes were made)
    • Bill's website
Re: Coax Indicator, designed by W.K.Todd
« Reply #42 on: December 23, 2018, 12:04:42 AM »
 :slap: You can centre on a counter sink but it would be more accurate to drop the probe into the hole (with a suitable sized ball) . The pivoting nature of the probe obviously requires some vertical freedom.


My 3d probe would have been a better option, unfortunately it never worked well enough . I have another design (copy of the Haimer 3d taster) but have yet to find time to build it.

https://madmodder.net/index.php/topic,6998.msg75024.html#msg75024
« Last Edit: December 23, 2018, 12:15:25 AM by BillTodd »
Bill
wy omnibus Latinis taurus stercore?