Most woods are easy to use in the Zing 24, assuming the proper settings are made.
Epilog recommends the following settings for engraving wood, specifically cherry, alder, and walnut:
The sign in the front door is engraved into poplar using the above settings. I think it is a bit deep, and would consider using a faster speed or less power if doing it again.
Epilog recommends the following setting for vector cutting wood, specifically cherry, alder, and walnut:
|1/8", 3 mm||70||50||500|
|1/4", 6.4 mm||20||100||500|
Epilog suggests that thicker wood may be cut in multiple passes.
No vector etching of wood has happened yet. Experimentation needs to be done. In general, using faster speeds or lower power will etch rather than cut.
Lowe's sells 24"x5.5"x1/4" poplar boards for $3.49 each. They cut well and etch well. Lowe's also sells the same material in different sizes as well.