If you think that the part you are trying to print is too large for the build plate there are a few things you can do. 

1) Login to the Polar Cloud

2) On the cloud go to your printer and click into the Printer Details page that brings you to the page where you can see the camera feed.

3) Go to the print queue and click into Load to Stage

4) Here the object should have a yellow box around it. If the object is in fact too big then there will be a red box around it.

5) Click the scale tool and bring the X-axis (automatically scales Y & Z) down until the box is yellow again.