If you are able to increase the stitch dial by 2* or more then you can cast off using a tappet tool. This gives a nice even chain effect edge.
The tappet tool can be used to create a nice crochet chained cast on edge for your machine knitting. This post shows you how to do it.
You can cast off your knitting using a darning or tapestry needle. Method 1 uses a quick running stitch which is good for swatches although a the edge is a little uneven. Method 2 uses a back stitch which is slower but gives a neater finish.