This member of the oncidium family has been a reliable bloomer over the years, with no special treatment.
I grow this one like any other oncidium, with bright light, and let it dry out between waterings. It gets direct morning sun, then indirect bright light after noon. Like any other thin leaved oncid, it will get (and has gotten) a few accordian leaves on new growth if I let it go too long between waterings. While it doesn’t hurt the plant or interfere with photosynthesis, it is a little unsightly. Anyway, it’s ridiculously easy to grow and bloom.