Give Centre Point:
Place the cursor anywhere on the circle circumference and hit theon the keyboard. The symbol is displayed denoting that Draft it has found the circle centre point. Whilst this is displayed click to accept the position. The prompt reads:
Give Radius Point:
Now for the 40mm diameter circle, either repeat the above procedure (using thekey) to select the existing centre point or move the cursor toward the actual circle centre and click when the symbol is displayed. After picking the centre drag the cursor to the right and click to accept when the X dimension reads 20.00 and the Y reads zero.
Now to draw the first 12mm diameter circle which is going to be the topmost hole 45mm (the PCD is 90mm) above the centre point of the existing circles. Here we can use the Draft it Relative feature to define this position.
Reselect the Circle command once more and move the cursor over the existing centre point. When the symbol is displayed hit the; key and the X, Y dynamic dimensions will be activated . Click to confirm the new point when the values read X0.00, Y45.00.
We now need to define the radius point 6mm away from the centre, however the Cursor Increment is set to 5mm. Rather than resetting this value to something more suitable we can use Direct Input to enter the X & Y values required. Now simply hit (you will notice a small input box next to the cursor) and then hit This is the 'X' co-ordinate. For the 'Y' value hit and then . The 12mm circle should now be drawn.