Need help with egg tray project please

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Need help with egg tray project please

Postby imac1959 » Sat Oct 28, 2017 10:44 am

My wife has asked me to make some egg trays for family similar to this

https://ligneus.co.uk/wp-content/upload ... g-tray.jpg

I am not sure how to achieve the best way of cutting the egg shaped recesses, can anyone give me a hint at the best way so I can develop this further?

Thank you!
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Re: Need help with egg tray project please

Postby Adrian » Sat Oct 28, 2017 12:26 pm

Use one of the dome/dish clipart models that come with VCarve and set the model to be subtracted then 3D toolpath it. It can also be done with a series of fluting toolpaths and I suspect with a moulding toolpath too but I haven't used that enough to be able to say 100% without being at my design computer.
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Re: Need help with egg tray project please

Postby 4DThinker » Sat Oct 28, 2017 1:59 pm

Of the three strategies that Adrian mentioned, the recently added Moulding tool path will likely be the most efficient solution. It is a little tricky to set up for bowl shapes, but only requires a tiny circle and a 1/4 circle/arc for the bowl profile. If not too deep you can probably skip the larger area clearance pass.
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Re: Need help with egg tray project please

Postby dhellew2 » Wed Nov 01, 2017 6:46 am

Here is an 18-egg holder
Send me a pm with your email and I will send you the .crv3d or .crv file
The file is 12 meg so I cannot post it
Dale

egg holder.jpg
You will get old if you live long enough!

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Re: Need help with egg tray project please

Postby adze_cnc » Wed Nov 01, 2017 5:22 pm

My question would have to be does the egg-holder necessarily need a concave inner surface at all? You're unlikely to find a dozen eggs with exactly that curvature so it can't be for support of the eggs.

Would it not be easier to have a shallow pocket instead? The pocket doesn't have to be very deep. The Toshiba BC-310 egg cooker in the image is quite shallow and the eggs don't touch the heating surface.

Toshiba_BC-310.jpg
Toshiba BC-310 egg cooker


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Re: Need help with egg tray project please

Postby pjblues » Tue Nov 07, 2017 8:27 pm

Could I get a copy of the files for the 18 egg holder please?

My email is:

pjblues1@neo.rr.com

Thanks.
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Need help with egg tray project please

Postby Bobtail Farm » Tue Nov 28, 2017 10:30 am

While we are on the topic of the egg tray project (and apologize in advance if this is considered hi-jacking the thread). My significant other had a similar request earlier this year (those catalogs do get around). I made several (12, not 18-egg trays). However, to avoid the undesirable effect (see attached rendition) from the toolpaths I created, I had to do a work around while machining. I recognize this is my error, or at least lack of sufficient understanding. And while the work arounds worked around and avoided the undesireable result shown in the depiction, I expect that there is a correct way I should be creating the tool path leaving an elegant machining operation (without using any one of several work-arounds). I have v-carve pro, and used the 90 degree dome models to create the project, stretching the height appropriately. Created the rough and finish tool paths, using a 1/2 spiral and 1/2 BN, respectively.

Thanks.
Brian
Attachments
IMG_6222 Walnut egg carton.jpg
Machined using "work-around". there are several ways to avoid the unwanted cut depicted in the other "photo". Here, the finish path was set with a minus 0.25" offset, and I "faked" the Z setting when maching the finish path by seeting it at minus 0.25. Figure there is an elegant (e.g., correct) method.
Egg Carton Rough and Finish showing unwanted cut to tip of ball nose outside of model.jpg
Rendition by v-carve showing "unwanted cut". Had set finish model to cut to vector (setting to model yielded same result) where the vector was a circle the size of the "top" of each model (dome).
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Re: Need help with egg tray project please

Postby mtylerfl » Tue Nov 28, 2017 2:49 pm

Hi Bob,

It may be simply that you didn't use the Zero Plane in your layout. A Zero Plane eliminates the chatter around edges of recessed dishes.

There are a couple Vectric tutorial videos that will explain the process for you. Go to the Training video page and do a search for "Zero Plane".
Michael Tyler

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Need help with egg tray project please

Postby Bobtail Farm » Thu Nov 30, 2017 10:26 am

Thank you Michael for the pointer. Will do.
Brian.
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