check out F-Engrave. It's free and is good for signs and simple v carving. I use it quite a bit for doing both images and text. Photos of a couple of box lids done with F-Engrave are attached. Basically those were black and white line drawing images created with a drawing app (Affinity Design, $50) but Inkscape would work fine and it's free. Even Microsoft Paint could be used. You can also get F-Engrave to directly use TrueType fonts of which there are thousands available for free. Those box lids were made with a 90 degree V Bit - 1/4" shank. Does your machine take 1/4" bits? I couldn't see anything on the amazon page that said if it did.
I should warn you, that machine is not likely to be able to make deep cuts without flexing so you will have to take multiple shallow cuts. Not the end of the world, it will just take longer.
By the way, you will probably want to dump the PC software that comes with it. The router runs GRBL and there are lots of free "control" programs that work with it. GRBL Panel, bCNC, UGS and several others work pretty well.
If you want to really crank out plaques, you will probably want to look at investing $2K or more. If you can get $100 for a plaque and crank out 10 a day, it would pay for itself pretty fast. The more rigid the machine, the faster it can run. But there is also the question of how long will the machine last. Your little chinese machine probably isn't that reliable. Frankly, I would want to have something like an Avid Pro4824 ($6-9K depending on how much you do yourself) for that kind of business. And, maybe two of them for more reliability.
Last edited by PhilBa; 01-03-2020 at 03:25 AM.