Author Topic: Coax Indicator, designed by W.K.Todd  (Read 7210 times)

Offline fumopuc

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Coax Indicator, designed by W.K.Todd
« on: December 12, 2018, 11:05:45 AM »
Hi everybody,
I am trying to make one, here the slightly modified design and were I am today.
Kind Regards
Achim

Offline BillTodd

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Re: Coax Indicator, designed by W.K.Todd
« Reply #1 on: December 12, 2018, 12:19:30 PM »
Looks good,

 It's really a buzz to see someone making something I designed  :pinkelephant:

Were the drawing ok, were you able to follow my description?

Bill

P.s the pdf is on my google drive here:

https://drive.google.com/file/d/0BwXDcXKx2KzlaUVrZ0l6QU4yaTA/view?usp=drivesdk
« Last Edit: December 12, 2018, 12:22:33 PM by BillTodd »

Offline fumopuc

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Re: Coax Indicator, designed by W.K.Todd
« Reply #2 on: December 12, 2018, 01:44:04 PM »
Hi Bill,
thanks for the link to your drawings.
It seems that I have downloaded the same set some time ago, I think via MadModder.
During the last summer I have redrawn everything in Fusion 360 and I have started the making now.
For me the information of the real shape and dimension of the rocker was a bit weak, so I have imported the picture into Fusion and the software has calculated everything by given the dimension of a known whole, 4 mm.
Progress will be shown here.
Kind Regards
Achim

Offline fumopuc

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Re: Coax Indicator, designed by W.K.Todd
« Reply #3 on: December 12, 2018, 02:36:54 PM »
... and the up date from this afternoon.
The two aluminum parts are fitted togther with some epoxy glue and cured in the oven at 100°C.
My fingers should give an idea about the overall dimension.
Currently I am playing a bit with Fusion CAM.
Kind Regards
Achim

Online Vixen

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Re: Coax Indicator, designed by W.K.Todd
« Reply #4 on: December 12, 2018, 03:52:18 PM »
Hi Bill and Achim,

This coaxial indicator looks very useful and has been added to my 'to do' list   :ThumbsUp: :ThumbsUp:

Do you find it more convenient to have the dial facing forward of facing upward? I am thinking about the view of the dial, when you swing it through 360 degrees.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Online sco

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Re: Coax Indicator, designed by W.K.Todd
« Reply #5 on: December 12, 2018, 04:46:10 PM »
I've always wanted one of these so have added it to my 'To Do List' too!

Thanks Bill and Achim,

Simon.
Ars longa, vita brevis.

Offline fumopuc

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Re: Coax Indicator, designed by W.K.Todd
« Reply #6 on: December 12, 2018, 04:55:34 PM »
Hi Bill and Achim,

This coaxial indicator looks very useful and has been added to my 'to do' list   :ThumbsUp: :ThumbsUp:

Do you find it more convenient to have the dial facing forward of facing upward? I am thinking about the view of the dial, when you swing it through 360 degrees.

Mike


Hi Mike, with the M4 bolt a clamping in every position should be possible.
Kind Regards
Achim

Offline b.lindsey

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Re: Coax Indicator, designed by W.K.Todd
« Reply #7 on: December 12, 2018, 05:08:45 PM »
Well the beauty of a coax indicator is that the dial stays in one place and doesn't swing through 360 degrees.

Bill

Online Vixen

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Re: Coax Indicator, designed by W.K.Todd
« Reply #8 on: December 12, 2018, 05:13:00 PM »
Well the beauty of a coax indicator is that the dial stays in one place and doesn't swing through 360 degrees.

Bill

Thanks Bill,
I had assumed you rotated the dial gauge, but it seems you can also rotate the spindle and the dial remains stationary.

Mike :facepalm: :facepalm:
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline crueby

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Re: Coax Indicator, designed by W.K.Todd
« Reply #9 on: December 12, 2018, 06:19:06 PM »
I had to do a search on coax indicators, there are a couple of youtube vids that show them in action - pretty slick units.

Offline BillTodd

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Re: Coax Indicator, designed by W.K.Todd
« Reply #10 on: December 12, 2018, 06:22:52 PM »
Hi Bill,
thanks for the link to your drawings.
It seems that I have downloaded the same set some time ago, I think via MadModder.
During the last summer I have redrawn everything in Fusion 360 and I have started the making now.
For me the information of the real shape and dimension of the rocker was a bit weak, so I have imported the picture into Fusion and the software has calculated everything by given the dimension of a known whole, 4 mm.
Progress will be shown here.


Ok, perhaps i should have made it clear that the shape is unimportant  , except for the offset stylus mount, which reduces the overal height.

I was going to experiment with the shape of the sliding feet , so as to reduce sine error .

Offline b.lindsey

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Re: Coax Indicator, designed by W.K.Todd
« Reply #11 on: December 12, 2018, 09:46:36 PM »
Chris that are great for things like aligning the RT to the mill spindle. The only downside is they require a lot of headroom, but perfect for Bridgeport type mills.

Bill

Offline crueby

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Re: Coax Indicator, designed by W.K.Todd
« Reply #12 on: December 12, 2018, 10:19:32 PM »
Chris that are great for things like aligning the RT to the mill spindle. The only downside is they require a lot of headroom, but perfect for Bridgeport type mills.

Bill
Having the taller column ony sherline, could work...   Hmmm...

Offline b.lindsey

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Re: Coax Indicator, designed by W.K.Todd
« Reply #13 on: December 12, 2018, 10:30:19 PM »
Bill's design looks like it needs less headroom than my SPI unit. So yeah it could work with the taller column.

Bill

Offline BillTodd

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Re: Coax Indicator, designed by W.K.Todd
« Reply #14 on: December 12, 2018, 11:30:22 PM »
Bill's design looks like it needs less headroom than my SPI unit. So yeah it could work with the taller column.

Bill

I designed it to be as short as possible because the  vertical head on my Haighton mill has very little head room .

 

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