Help needed.

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Help needed.

Postby Pete Howlett » Tue Aug 07, 2018 8:14 pm

I've been wrestling with my CNC to produce ukulele components for a year now and have got the basic stuff down. I recently designed a jig and tool paths seen performing here https://www.facebook.com/artisanukulelemaker/videos/1722477627801194/UzpfSTIwNTc1MjkwNDExNjA0ODk6MjE5MDk4ODMzMTE0Nzg5Mg/

I only understand 2D work so I end up finishing the process by hand carving the string ramps. I don't know how to post and image so will describe the se- they are the slopping 'truncated cylinder' shapes that the strings go over to attach to the tuning posts. I know I can model these in V carve pro but just don't know how. Can anyone enter into a dialogue with me to help me with this off of this forum so I can either Skype or send video or somehow get this last part done...

Thanks
Pete
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Re: Help needed.

Postby Rcnewcomb » Wed Aug 08, 2018 3:14 am

Pete,
First off, we are honored to have someone of your talent on the forum.

carving the string ramps

Are you referring to the slots in a headstock like this?

Image

If so the fastest method is to use a large diameter ballnose bit and a fluting toolpath. There are ways to do it with smaller bits as well. Am I understanding you correctly?
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Re: Help needed.

Postby Pete Howlett » Wed Aug 08, 2018 8:18 pm

Yes. I know that would be one way but it would require a tool change. I am looking to complete all operations with a 5mm bull nose bit...
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Re: Help needed.

Postby Rcnewcomb » Thu Aug 09, 2018 1:35 am

Here is one approach. Basically I took one of the 3D domes and changed it to subtract so it would be concave instead of convex.

SlottedHeadstockPreview.PNG


The example CRV file is here: SlottedHeadstock
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Re: Help needed.

Postby Pete Howlett » Thu Aug 09, 2018 8:53 pm

As I sat thinking about the problem last night I came to this conclusion as well. I drew out what I thought it should look like using the tools but don't quite know how to create the dish tool path. Do you have a private email address i could send the file to for you to look at? My address is pete@petehowlettukulele.com if you want to ping me there.
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Re: Help needed.

Postby Rcnewcomb » Fri Aug 10, 2018 12:15 am

Email sent.
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Re: Help needed.

Postby dwilli9013 » Fri Aug 10, 2018 1:19 am

Oh boy 2 Luthiers getting ready to collaborate. I cannot wait to see the outcome. That is so why I love this forum soooo much. :lol: :lol:
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Re: Help needed.

Postby Pete Howlett » Fri Aug 10, 2018 6:39 pm

Thanks. Beens so busy today. Will review the file tomorrow and send it over.
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