Scaling the model (Box Method)
Scaling the model is a necessary part of making this model and i like to make things as simple as possible. That means not having to hunt around for a calculator to work out how much to upscale the model by. To make things easy I developed the Box Method of scaling which in my opinion the easiest way of scaling a drawing accurately snce you don't need to calculate anything.
There are just 3 simple rules to the scaling method.
- The box must be larger that the item being scaled.
- The box must enclose the entire item being scaled
- One side of the boxes dimension must bear a direct relationship to the measurement being scaled. eg for a 3.4mm item I wanted to scale to 5mm I would make one side of the box 3.4 metres long.
Scale the dimensioned side of the box to the new dimension eg. If I wanted my 3.4mm piece to become 5mm the I would scale my 3.4 metre to 5 metres and the drawing will be automatically scaled to the correct size all without having to work out the scale factor.
Give it a try and see what you think.
In the next episode I will be showing how I layout the parts for cutting and how to use the 180 degree method to cut the remaining parts on the end of the stock.
Untill next time thanks fortaking the time to watch and read.
Where did I get the cutters for this project?
The cutter I used were purchased from this supplier on Ebay
Other ebay suppliers of 1/8" down cutting bits.
They are 1/8" in diameter single flute down cutting spiral bits.
The length of the cutting edger is 10mm ( 3/8") but anything similar eg 12mm(1/2") or 6mm(1/4") cutting edge would work just as well. There is little point having a longer cutting edge unless you are looking to cut your material in one pass. The flute area is weaker than the main shaft so a longer flute just weakens the cutter in my opinion. In fact since I do not cut more than 1/8th per pass any flute longer than 1/4" is a waste.
Model used in this project