Tuesday, May 15, 2012

Moulding Profiles of Writing Table 1

Last week we took a brief look at the moulding profiles of three different writing desks. You were assigned the task of considering the execution.

The first set of profiles is e-executed using the following steps and ePlanes

Dimensions


Step 1:
A rabbet defines all fillets and transition points from concave to convex, convex to concave, vertical fillet to concave, etc. 



Step 2: A rabbet is added to guide each of your eRounds. (Note that in the following instances the vertex of the rabbet nearly falls upon the finished profile. This facet will serve as a depth gauge. The arrises of the rabbet approximates the angle of the finished profile.)



Step 3: A chamfer is made to guide each of your eHollows. (Take note that the chamfers approximate the angle of the finished profile. Additionally, there are times when the chamfer does and does not touch the finished profile. Is this intentional? If so, Why?)




Step 4: Knock of the corners with the appropriately sized hollows and rounds. If you don't have the a plane with the perfect radius use your closest undersized round and oversized hollow.





Complete:

I should also note that I am not suggesting that these profiles were historically executed in this fashion. 

I'm simply showing you an option to produce tons of profiles with the same set of tools.


2 comments:

  1. Matt, you say
    Step 3: A chamfer is made to guide each of your eHollows. (Take note that the rabbets approximate the angle of the finished profile. Additionally, there are times when the rabbet does and does not touch the finished profile. Is this intentional? If so, Why?
    I think you meant to say the chamfer instead of the rabbet, but to answer your question, I think that if the profile is greater than 1/6 of a circle you need to creep up on it and that may be why the initial chamfers do not touch the profile. I have enjoyed your mini-lectures over the past several months and look forward to your book. Using your guidance and tips I have made several picture frames and enjoyed doing it. Thanks
    Larry Barrett

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  2. Larry,
    I made the necessary corrections.

    The chamfer does not touch the finished profile when making a quarter circle because the chamfer will be too wide for the plane's sole. The plane will not be able to register on both edges. So, Yes, you must creep up on these profiles...or make two chamfers.
    Matt

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