I made this sign for my grandson's other grandpa since we both ride bikes. Here's the settings for those who want to know. 12in by 24in by 0.25in cell cast acrylic from ebay. Cut depth .025, depth per pass 0.01, travel 100in/min, spindle speed 17000 (setting 3 on my Makita trim router). I lied to Easel by telling it I was using a 1/32 bit when I was really using a 1/16. That got rid of all the little red uncutable places on the chain. The bit was a single flute upcut from Drillman1 on ebay.
Since I made the sign I've changed my technique to using a 60 degree V bit and my cut depth to 0.02 instead of 0.025. I also set my Makita to it's slowest speed. I used the Easel software available at Inventables website. To create my SVG, I use any graphics program . Create a black and white line art type image. Save it as a BMP file Then I use a free program called CR8tracer to convert to SVG then import into Easel. Another not free but inexpensive program to convert images to vector images is Vector Magic.