Can you help me check my diagonal scale drawing? It's for a 2:1 scale reading to 0.1 mm.

Thanks for sending the image! It looks like you've started constructing a diagonal scale, which is exactly what we discussed for reading measurements in millimeters and tenths of a millimeter.

From what I can see in your drawing:

• Main Divisions: There's a horizontal line at the bottom with markings that appear to be '0', '5', and '10'. This likely represents the millimeter subdivisions (e.g., 0 mm to 10 mm, which is 1 cm) of the first major division of your scale.
• Vertical Divisions: On the left side, there's a vertical line with markings '0', '1', '2', '3', '4', and possibly more extending upwards. These are the divisions for the "tents" (0.1 mm), which are crucial for a diagonal scale.
• Diagonal Lines: I can clearly see the diagonal lines connecting the horizontal millimeter subdivisions to the vertical "tent" subdivisions. This is the key feature that allows for reading down to 0.1 mm.
• Grid: The grid pattern above the diagonal section indicates that you've extended the horizontal lines from the vertical divisions and the vertical lines from the main scale, which is correct for a diagonal scale construction.

Your drawing shows the essential elements of a diagonal scale. To fully verify it, I would need to measure the actual lengths on your paper to confirm it's exactly "twice full size" (2:1 RF) and that the subdivisions are accurate. However, the visual structure is consistent with the detailed construction steps for a diagonal scale.