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  1. #1
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    Default form tool - interesting video

    Some discussion here http://www.hobby-machinist.com/showt...his-shape#post

    and a video here https://www.youtube.com/watch?v=n5b7IimlLzg

    video is interesting - - I always imagined that a form tool would be pushed in from the side of the workpiece rather than underneath it.

    Could I make chess pieces on my little 9" Hercus like this or do I need heaps more power and mass ?

    By the time I've learned how to and then ground the cutters it might be easier to make chess pieces manually with the compound or by graving

    Will search the forum for graving and chess pieces.

    Other links in the original thread are worth looking at for ideas re simple pantograph and following a 2d sketch

    Probably already discussed on this forum somewhere - will have a look.

    Bill
    Last edited by steamingbill; 27th Oct 2014 at 04:02 PM. Reason: added pantograph note

  2. #2
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    Default

    Quote Originally Posted by steamingbill View Post
    Some discussion here http://www.hobby-machinist.com/showt...his-shape#post
    <snip>Other links in the original thread are worth looking at for ideas re simple pantograph and following a 2d sketch
    Unless you are a member, you cant even read the text there. Nelson wont allow it.

    Phil.

  3. #3
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    Default

    Quote Originally Posted by Machtool View Post
    Unless you are a member, you cant even read the text there. Nelson wont allow it.

    Phil.
    You can still see the youtube video without being a member... however... I'm pretty sure that video was posted on PM already a while back..

    Ray

  4. #4
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    Default

    T'was only mentioning the hobby machinist link. Makes me wonder how they intend to build up the membership. One month you can view about 6 page counts until you are cut off at the knee's. As of tonight, all I get is.
    Dear Guest - In order to be able to view attachments and post, and to access "members only" features of this forum, you have to regisiter
    Pretty sure it was R.C that joined, then got banned because he didn't make enough posts.

  5. #5
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    Default Skiving

    Phil,

    You'd probably know all this stuff inside out and backwards anyway

    I thought the most interesting bits were on other links - here they are

    http://www.productionmachining.com/a...art-of-skiving -explanation of the tool in the video

    photo of a simple pantograph that guides the compound and cross slides using a template behind the lathe

    http://s1124.photobucket.com/user/xa...0a9b0.jpg.html

    the other idea dicussed was a variation on a pantograph, where you make a pointer attached to the cross slide - keep the tip of the pointer following the line on the drawing that you want to copy and the tool in the toolpost will recreate that shape on the workpiece. A bit like the idea shown in photo above only more prone to error due to following a drawing rather than a physical metal profile.

    Bill

  6. #6
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    Default

    Quote Originally Posted by steamingbill View Post

    I thought the most interesting bits were on other links - here they are

    http://www.productionmachining.com/a...art-of-skiving -explanation of the tool in the video

    photo of a simple pantograph that guides the compound and cross slides using a template behind the lathe

    http://s1124.photobucket.com/user/xa...0a9b0.jpg.html

    the other idea dicussed was a variation on a pantograph, where you make a pointer attached to the cross slide -
    I'm lost or we arnt talking about two differrent things here. A Skive tool is a form tool, thats mounted below center, to assist with rake. Mostly famous for production machines. And the form had to have alot of adjustments to produce a true form, because the tool wasn't on center line.

    The pantograph thing is a poor mans substitute for a copy attachement. Nothing wrong with that. I can do a fair approiximation of 45 deg chamfer just by winding the top & cross slides.

  7. #7
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    Default yes 2 different things

    Quote Originally Posted by Machtool View Post
    I'm lost or we arnt talking about two differrent things here.
    Phil,

    Yes you are right - two different things.

    You'd have to read the whole thread to see the context and understand how they discussed those separate issues under the broad topic of "How do I make fancy handles for my machine tools"

    Probably nothing interesting for experienced people like yourself, but for me, I thought that little video was amazing and I was impressed with the other ideas and made the initial post in this forum in case others would find the video and the associated discussion of any interest.

    I didnt realise that hobby-machinist was a members only forum and that non members wouldnt be able to see the thread. Sorry if I've caused any confusion.



    Bill

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