geometry question again, needing help please.

[devonwoody]

Starting a new pencil box with a sliding lid.

Could someone please tell me at what angle to set my tablesaw blade which tilts to the right.

Total span across the bottom 120mm. The bottom will have a long tenon at its edges.

I suppose the ends will need a compound mitre joints, and help needed in this area please.

 

[Dibs-h]

Starting a new pencil box with a sliding lid.

Could someone please tell me at what angle to set my tablesaw blade which tilts to the right.

Total span across the bottom 120mm. The bottom will have a long tenon at its edges.

I suppose the ends will need a compound mitre joints, and help needed in this area please.

It's about 17 degrees or thereabouts - working out on the drawing,

As an aside the following link - i.e. trig calculator makes life so much easier,

http://www.carbidedepot.com/formulas-trigright.asp

HIH

Dibs

 

[ondablade]

Another option which i'm sure you are familiar DW is to draw it to scale (ideally X2 or X3 maybe for extra accuracy), and directly extract the angles using an adjustable square...

 

[devonwoody]

Many thanks guys, will the end caps if mitred to sides and bottom involve compound angles to be worked out?

Or are they 45% angles as normal?

 

[George_N]

It will be a compound mitre. The exact angles will depend on whether the ends slope in at 17 degrees like the sides or not.

http://jansson.us/jcompound.html

 

[devonwoody]

Thank you George, ummmmmmm, I think this last idea of mine could give me more grey hair or even less of it.

 

[ondablade]

Ta George, that's a very useful site....