Would someone like to try out this 4th axis fixture? - Page 4
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  1. #61
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    Quote Originally Posted by aarongough View Post
    Is there any possibility to do some 'push button indexing' on the fixture? Even if it was some sort of ratchet/pawl mechanism that rotated the platter in 1º or 5º increment or something? The machine could index the 4th to a known position and then use a rod held in a toolholder to push the indexing button and rotate the platter the desired amount...
    Or like I mentioned before with the other type pneumatic indexing with an m code. I think that’s a pretty simple way and could be pretty cheap.

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  3. #62
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    Quote Originally Posted by aarongough View Post
    Is there any possibility to do some 'push button indexing' on the fixture? Even if it was some sort of ratchet/pawl mechanism that rotated the platter in 1º or 5º increment or something? The machine could index the 4th to a known position and then use a rod held in a toolholder to push the indexing button and rotate the platter the desired amount...
    Yuasa had indexers like that back in the 80s. IIRC it would index at 5 degree increments with up to 90 degrees in a single push by varying how far you pushed the plunger. Maybe they still offer them?

  4. #63
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    This was on display at IMTS in 2002

    A push button indexer, called the Rodexer.

    I seem to be repeating myself.....

    Rotary Indexer


    They seem to be gone now.
    So, you feeling lucky?

  5. #64
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    I found it - touchdex

    product_pic_06.jpg

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    The ones I helped set up were just single units set as an A axis. They looked more like the one with a single plunger attached to the face of the main indexer in Mud's picture.

    Thinking back on it, I wished I had known more about macro programming back then. Would have made a pretty slick application for a G code macro with the index angle as the A address and dynamic fixture offset tracking ability.

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    Quote Originally Posted by Mud View Post
    I found it - touchdex

    product_pic_06.jpg
    i just looked online--what kind of $ are these,approx?

  8. #67
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    Quote Originally Posted by pat pounden View Post
    i just looked online--what kind of $ are these,approx?
    This one is $6,400: MC Index, Touchdex FDM-230 | KAWATA CHUCK | MISUMI

  9. #68
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    now i know why i've never seen one....!

  10. #69
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    Quote Originally Posted by D Smith View Post
    If you make a bunch of parts in the 4"x4"x4" size range and have a 4th axis I would like to send you this fixture to try out and let me know what you think. Sort of beta testing I guess. Shoot me an email if you have a number of jobs to try it. 5 axis indexing is really easy with this.
    email me at
    [email protected] if you would like to play with it for a while.
    thanks,

    I wish you luck with this.
    Hopefully you can werk out any issues and that this last few pages isn't the end of this!
    I feel bad for you right now.


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    Think Snow Eh!
    Ox

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    I've sort of been in this position before. A couple times.

    Seems like when you send someone something to help test and give you honest feedback they think they have you by the balls and don't need to follow through with any of those obligations.

    Hope the OP finds some shops nearby to work with and this thing goes somewhere.

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  13. #71
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    Tracking shows it was delivered yesterday, 5-30. I hope it works out to have someone somewhat local test it out also.

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    Yeap, It showed up all right. I sort of did feel bad about wanting to get it back but it had been three months with no feedback or video as promised but I've got no hard feeling over it. The idea was to get feed back and I said this one was the prototype with some improvements to be made. The tightness of the spindle was do to me finding the right preload on the tapered roller bearings. I'm all about making it without any wiggle and I figured out how to measure the preload vs any noticeable end play in the spindle. The other issue I had found was I used double 1/16th wide O-rings with .015 compression to keep out chips and coolant out. The parker engineer set me straight as this was way to much for a nearly static o-ring application. I also was able to change over to Lip seal and fill the indexer with oil to keep things nice and lubed. In the 3 months it was gone I also had time to get the index rings heat treated and wire edm'd. Along with the unit itself is now made from a solid 4140 HT one piece construction rather than two piece bolt and pin style. I have a shop 20 miles down the road using Rev2 to machine 7075 RC Car transmission housings and should have video and feed back shortly, Here is Rev2 with proper bearing preload, new o-ring seal, hardened index ring and oil bath for bearings and seal.
    model-200.jpgsolid.jpg

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  16. #73
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    Am I seeing a CR seal on the face of the fixture?
    That just looks like it's begging for coolant intrusion!

    If so - I would HIGHLY recommend that you at least make a "slinger" to cover it.

    But preferably - I would like to see the seal surface come up from the base a bit, and then the spindle to have a slinger that not only covered it full D, but also went down over it as well. ("top-hat" style cover)

    Coolant IS going to git in there in any situation short of air purge, but try to make it as hard as possible.

    I wonder if a wavey worsher type spring could be used for bearing tension?


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    I will admit it was too tough to index, Here is a video of the level of difficulty just be I loaned it out.
    YouTube

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    Yes the Parker engineer help me with the slinger type shape on the plater so the top of the seal is covered by over hang of the top plate. Just enough to protect but not trap chips we hope.

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    Quote Originally Posted by D Smith View Post
    I will admit it was too tough to index, Here is a video of the level of difficulty just be I loaned it out.
    YouTube
    Link not working?

  21. #77
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    Quote Originally Posted by Mud View Post
    I found it - touchdex

    product_pic_06.jpg
    When I needed something to get the jobs I wanted done with out a full blown 5 axis machine I contacted Yuasa about the pictured Touchdex. I recall the price as $22,500 for the one pictured. They make a smaller single axis that is so cute and would fit on a Haas HRT210 but is just over $10K. That's when I thought I could do something on my own for $3K and use my HRT160.

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  23. #78
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    I'm not sure that you even need bearings for most apps?

    The cheap knock-off ( ) 5C spin fixture that has been setting on my Harig for >30 years doesn't have bearings.
    Just keep a smidge of oil for it to spin on is all.

    I grind step drills on that - often enough....

    I could see that and a grease zerk working fine here for 99% of apps.


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  24. #79
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    Link works for me, Does PM block youtube links sometimes?

    in youtube search bar type Moreside fixture indexing
    Last edited by D Smith; 06-01-2020 at 06:33 PM. Reason: added info

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    Yuasa Accudex has bearings,I love those things but try and spin one of those with one hand! They sell a cheaper 8" index space without but I don't get the feeling of precision and accuracy with zero play with out the bearings. A friend has an EDM shop and paid $3K for a custom 5c indexer that is Herman Schmidt quality and it has no bearing but was totally ground on a jig bore and he has to take it apart and clean it occasionally.

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