To put my two cents in, start with determining optimal chipload for your specific bit and material you cut.
For example, open this
Onsrud page and one of Plywood Cutting Data documents.
You will see that minimum recommended chipload for 1/4" (cca 6 mm) bit is 0.005" (0.127 mm).
(As your DOC is greater than 1x bit diameter, you can decrease chipload (2xD DOC - 25%, 3xD DOC - 50%))
Quick math: requested feed rate 800 mm/min / (2 flutes x requested chipload 0.127 mm) = 3.150 rpm.
If it is too low rpm for your spindle, you can
- use 1-flute bit,
- set higher feed rate, or
- decrease chipload.
E.g., 1000 mm/min / (1 flute x 0.1) = 10.000 rpm
Wait for confirmation from someone much more experienced before you even start to think about setting any of parameters above...