Author Topic: 3d indicator design  (Read 39640 times)

Offline BillTodd

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3d indicator design
« on: April 03, 2012, 03:25:18 PM »
Sneak preview of my 3D indicator design.

Bill

Offline BillTodd

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Re: 3d indicator design
« Reply #1 on: April 03, 2012, 05:21:24 PM »
Finalising the design of the body.

Two parts Body of aluminium and Shaft of steel will be easier to make.
Bill

Offline Deko

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Re: 3d indicator design
« Reply #2 on: April 03, 2012, 05:24:15 PM »
Looks good Bill. How do'es it work? Ball on each end of the probe ? :scratch:  Giza clue Bill, giza clue. :poke:

Cheers  Dek

Offline BillTodd

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Re: 3d indicator design
« Reply #3 on: April 03, 2012, 05:29:33 PM »
I'm still finesse-ing the design of the probe ATM (I want it to be easily replaceable without taking the whole thing apart )

I'll reveal all when I'm done ;)

Bill
Bill

Offline BillTodd

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Re: 3d indicator design
« Reply #4 on: April 04, 2012, 05:37:00 PM »
Still not quite worked out the probe bit yet, but you should be able to work out how it is supposed to work, from this section:

Bill

Offline andyf

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Re: 3d indicator design
« Reply #5 on: April 04, 2012, 06:53:57 PM »
Hi Bill,

What advantages do you see for this 3D design over your earlier co-ax indicator?

No criticism implied - just curious, that's all.

Andy
Sale, Cheshire
I've cut the end off it twice, but it's still too short

Offline BillTodd

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Re: 3d indicator design
« Reply #6 on: April 04, 2012, 07:01:52 PM »
Quote
What advantages do you see for this 3D design over your earlier co-ax indicator?
It does a different job. 

This is an edge finder, allowing any face in X, Y or Z planes to be located easily.

It was inspired by this Haimer device:

Bill

Offline andyf

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Re: 3d indicator design
« Reply #7 on: April 04, 2012, 07:06:21 PM »
Thanks, Bill. Now I understand.

Andy
Sale, Cheshire
I've cut the end off it twice, but it's still too short

Offline Joules

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Re: 3d indicator design
« Reply #8 on: April 05, 2012, 09:53:02 AM »
Nice drawing and concept, but not sure I can figure out how the probe gimbal works.  What keeps it in the centre under a side load.  I could understand a ball joint ?
Honour your mentors, and pay it forward.

Offline Joules

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Re: 3d indicator design
« Reply #9 on: April 05, 2012, 09:59:39 AM »
Ahhh, the penny dropped, two caged bearing races slide over the sandwiched plate....
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Offline BillTodd

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Re: 3d indicator design
« Reply #10 on: April 05, 2012, 11:51:30 AM »
Ahhh, the penny dropped, two caged bearing races slide over the sandwiched plate....

 :thumbup:

Bill

Offline Brass_Machine

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Re: 3d indicator design
« Reply #11 on: April 05, 2012, 01:59:06 PM »
I watched the video. What a neat bit of kit. I would be interested in building one and helping you test!

Eric
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Offline BillTodd

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Re: 3d indicator design
« Reply #12 on: April 05, 2012, 04:48:03 PM »
Making the probe replaceable has me puzzled ATM.

The Haimer one which has a gimballed probe which cannot rotate , so they screw their probes in position. I rejected the gimbals idea because is would be difficult to make. My linear slide is a simple thrust washer sandwiched between two thrust bearings  so has 3 degrees of freedom (X, Y and rotation). In addition the probe has another degree of freedom (Z) and is also free to rotate.

I'm thinking about  clamping the probe in a collet like arrangement requiring two spanners to fit (fiddly, but this is DIY  ;))

Quote
I would be interested in building one and helping you test!
It's still in the idea/development stage ATM so I would not encourage you to commit to metal just yet. (machining pixels is faster and cheaper )

I'll post drawings when I'm done
Bill

Offline BillTodd

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Re: 3d indicator design
« Reply #13 on: April 11, 2012, 05:38:47 PM »
The latest incantation has bulked up a bit to accommodate a removable probe (held in place by a small magnet)

Still not quite there but getting close.
Bill

Offline Divided he ad

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Re: 3d indicator design
« Reply #14 on: April 12, 2012, 05:27:11 AM »
Excellent concept, very neat design Bill :clap:

Gotta love the magnet idea  :smart:



I purchased a two very small DTI (1" clock face) second hand from a booty a while back with a view to making your coaxial indicator.... Well, I was going to have a go! (Still on the tuit list)

Now I may have a use for the second one  :ddb:



Watching with great interest.... And I'll be nudging you for names of suppliers for the thrust bearings etc too  :poke:   :)






Ralph.
I know what I know and need to know more!!!

Offline BillTodd

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Re: 3d indicator design
« Reply #15 on: April 12, 2012, 08:36:10 AM »
Quote
Gotta love the magnet idea

Really? I've gone off the idea after a thinking about it.  If/when a bit of swarf finds its way up the tube it'll cause chaos and be difficult to remove

Bill
Bill

Offline andyf

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Re: 3d indicator design
« Reply #16 on: April 12, 2012, 08:51:03 AM »
Having a screw-in pointer (or a grubscrew fixing) might give a firmer fixing, Bill. One held by a magnet would have to be a very good fit in its hole to stop it waggling a bit from side to side.

Andy
Sale, Cheshire
I've cut the end off it twice, but it's still too short

Offline BillTodd

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Re: 3d indicator design
« Reply #17 on: April 12, 2012, 10:25:46 AM »
Having a screw-in pointer (or a grubscrew fixing) might give a firmer fixing, Bill. One held by a magnet would have to be a very good fit in its hole to stop it waggling a bit from side to side.

Andy
Yes you're quite right.  A screw in one would be my preferred way, but I can see no way to stop the lower taper (the bit with the magnet above) turning.  A clamp with a grub screw might be the answer .

Bill
Bill

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Re: 3d indicator design
« Reply #18 on: April 12, 2012, 02:31:41 PM »
Well I liked the magnet... But I see the points about the swarf and flex.

A good fit would definitely be required!


How about the use of a tommy bar through or into the receiver so you can screw one in still?


Just a thought...




Still wanna make one  :)






Ralph.



I know what I know and need to know more!!!

Offline BillTodd

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Re: 3d indicator design
« Reply #19 on: April 12, 2012, 04:04:36 PM »
Here's an animation , just in case anyone was still wondering how this works:
Bill

Offline philf

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Re: 3d indicator design
« Reply #20 on: April 12, 2012, 04:31:29 PM »
Very Nice Bill  :clap:

What have you modelled it in?

Phil.
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Offline Miner

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Re: 3d indicator design
« Reply #21 on: April 12, 2012, 05:22:15 PM »
Bill,
Since you know about the Haimer 3D "Tastors", Then you probably already know this. However many here won't. The real Haimer's have an adjustment feature so the the tool gets properly zeroed to the centerline of the spindles rotation. They also require a dedicated tool holder like a endmill holder. Any R-8 that still has the alignment set screw inside the taper is no problem, Since the tool holder will only fit the taper in one position. Without that, You would need to permanently mark the tool holder and spindle so the tool is at the same position each time it's used.

After buying mine, I contacted Haimer to see if I could get a exploded view of the internals to find out how the internal construction works. I never did get anything back from them. The removable cover on mine is factory sealed. so I'm not about to open it up.

Glacern Machine Tools also show a digital model and how their used.

Pete

Offline rowbare

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Re: 3d indicator design
« Reply #22 on: April 13, 2012, 01:36:50 PM »
US patent 5365673 has a drawing of the Haimer Taster.

bob

Offline Miner

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Re: 3d indicator design
« Reply #23 on: April 13, 2012, 02:25:17 PM »
Rowbare,
 :beer: Awesome man, Another of lifes questions finally answered. No wonder these units are so heavy for their size. There's a lot packed inside them. Thanks again.

Pete

Offline Topos

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Re: 3d indicator design
« Reply #24 on: April 20, 2012, 09:45:43 AM »
Add my standing Ovation to a super presentation of a wonderful design. :clap: