Type the word you want.
Letter by letter, do the following:
Click on the letter. A red box should show up around it with a bunch of arrows. Click on the left middle arrow to drag the letter. Drag the letter enough to the left so it overlaps the previous letter at least a little bit.
When you have done that for all the letters, click on the word so there is a box around the whole word. Then in the "Properties" box, click the box next to "Weld" so there is a check mark there.
To see how it will look, on the menu bar at the top, click Cutter, then "Preview." What is in red is how it will cut, so you can then make any adjustments to the spacing to make sure the letters are in fact welded.
It takes a bit of practice to figure out how much to overlap. One note I have found - cursive fonts will automatically weld if you click the weld box, no moving of the letters is needed. And some fonts just aren't meant to be welded - they look too weird.
I hope that helps! Let me know if you need more help - I love my SCAL - it is so much fun!!!