Model Engine Maker
Supporting => Tooling & Machines => Topic started by: fumopuc 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.
-
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
-
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.
-
... 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.
-
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
-
I've always wanted one of these so have added it to my 'To Do List' too!
Thanks Bill and Achim,
Simon.
-
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.
-
Well the beauty of a coax indicator is that the dial stays in one place and doesn't swing through 360 degrees.
Bill
-
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:
-
I had to do a search on coax indicators, there are a couple of youtube vids that show them in action - pretty slick units.
-
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 .
-
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
-
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...
-
Bill's design looks like it needs less headroom than my SPI unit. So yeah it could work with the taller column.
Bill
-
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 .
-
I have one that I bought at the NAMES show and then didn't use for a few years. Set it up fairly close to center in a hole flip on the spindle and dial in the table til its centered, done. I bought it from little machine shop & use it at work a lot now.
Art
-
Hi everybody,
here a picture of the standard low cost indicator and the version Bill has designed.
This big difference is the reason why I have started the build.
If someone is interested, here a video of making the rocker with Fusion360 CAM and my mini CNC mill.
https://www.youtube.com/watch?v=s3TaLJZOQLo
-
Nice video Achim and that picture really shows the reduction in headroom required!!
Bill
-
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 (https://drive.google.com/file/d/0BwXDcXKx2KzlaUVrZ0l6QU4yaTA/view?usp=drivesdk)
Hi Bill,
Is there any type of spring between the bearing at the top and the housing ?
-
And if I am interpreting the drawings correctly, the tip of the dial indicator is pushed back by that 45 degree taper on the center shaft, as the shaft is pulled by? Any chance you could do a cross-section view of the assembled unit in the 3D model? Its tough to visualize how it all comes together.
Thanks!Chris
-
.. that was easy. :Lol:
The housing will be lifted.
-
That helps a lot - thanks!!!
-
And here’s me thinking my list is looking like it’s going to get shorter!
Looking good Achim. And thanks to Bill for coming up with a neat design
Cheers Kerrin
-
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 (https://drive.google.com/file/d/0BwXDcXKx2KzlaUVrZ0l6QU4yaTA/view?usp=drivesdk)
Hi Bill,
Is there any type of spring between the bearing at the top and the housing ?
Yes, it should be just strong enough to push the body back when horizontal, but not too strong.
The spring should be the same diameter as the bearing so that it pushes on the outer race , the bearing stops the spring being wound up as the spindle turns
-
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 (https://drive.google.com/file/d/0BwXDcXKx2KzlaUVrZ0l6QU4yaTA/view?usp=drivesdk)
Hi Bill,
Is there any type of spring between the bearing at the top and the housing ?
Yes, it should be just strong enough to push the body back when horizontal, but not too strong.
The spring should be the same diameter as the bearing so that it pushes on the outer race , the bearing stops the spring being wound up as the spindle turns
Hi Bill
somethings like this is available of the shelf in SS, outer diameter is 21 mm and wire is 1 mm.
I will order one.
-
A little step forwards.
-
That looks great Achim!
Dave
-
You are making fast progress Achim!! Looks great so far too.
Bill
-
Steamer5, Bill, Dave, Bill, Thank you.
I have got it nearly.
I do have a basic run out of 0,05 mm, which, I think, is caused by my laziness.
I did not follow Bills advice to turn the shaft in one piece between centers.
My shaft is made by a 15 mm silver steel bar of the shelf.
At the turning operation, I could already measure a run out of 0,04 mm, which is now still visible plus some additional tolerances.
I will make the probe holder now and will see if I can work with this basic run out.
[youtube1]https://youtu.be/ftdXE0Wqhu8[/youtube1]
-
that runout may be caused by surface roughness, (grabbing the slider part) Try polishing the 45° section of the shaft
-
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.
[youtube1]https://youtu.be/JXgr-ajpuBk[/youtube1]
Bill thank you very much for the design and the drawings.
-
Well done Achim, and a great video showing it in use too.
Bill
-
Great job Achim :cheers:
-
Where do you find the attachment "bars"? I have the SPI unit, but I'd like a bit wider selection of lengths.
-
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.
-
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
-
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.
-
Hi Mike, no worries, the ball and the bar has been washed in acetone before the assembly.
BTDT - stung like a b######d :censored:
-
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
-
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 ::)
-
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
-
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?
-
: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