Units and scale

Set your CAD file to millimetres at real size before you upload it to the iJewel platform.

The iJewel platform reads the size of your model from the file. Make the model in millimetres, at the real size of the piece. A model in the wrong units loads much too large or much too small.

Before you start

• You have the model open in Rhino or in a different CAD tool.
• You know the real size of the piece.

Set the units in Rhino

Step 1 of 3

1. Type Units in the Rhino command line.
2. Set the model units to Millimeters.
3. Save the file.

Check the size

Step 1 of 4

1. Measure the model across its width.
2. Compare the result with the real piece. A ring is usually 15 mm to 25 mm across.
3. If the size is wrong, scale the model to the real size.
4. Export the file again.

A ring in inches

A ring that you draw in inches loads about 25 times too large.

Know what the upload options do

The upload settings have two options that change the size and the position of a model. The two options are on by default.

Option	Effect
Auto centre	The platform centers the model on the axis.
Auto scale	The platform scales the model automatically.

When you upload parts into a ring configurator, the platform sets these two options to off. Each part then keeps the size and the position from its file. Thus the units in each part file must be correct.

Related pages

• Layers and names
• Checklist before upload
• Upload options
• Your own 3D models in a configurator