so i measured the longest part of the grating and cut a slice just a little longer .
next i checked the depth on a scrap piece of wood, it took me a couple of times to get the right depth
then i made the spacer , this is the width of the slot plus the width of the grating space, i have included a drawing at the end of these pictures as i don't know how to move it to here . for the first cut i used my spacer against the blade and moved the fence up to it.(actually i did this before setting the depth)
heres the first cut
with the saw off. and the wood over the blade , loosen the fence and move it away
put the spacer next to the wood
and bring the fence back , remove the spacer , push the wood up to the fence and make the second cut
turn the saw off and position the wood over the blade , loosen the fence and move it away , put the spacer in place and move the fence back , remove the spacer , move the wood to the fence and make the next cut
keep doing this until you get to the end of the wood , it is very important to remember to keep your hands away from the moving blade and use a pusher if you can.
change blades for the thin one and set the thickness of the cut
check that the cut is right by fitting it into the slots that you already made , if its a good fit your good to go
keep going until your done,
heres the drawing explaining the spacer , if you want bigger holes make dimension A bigger , just make sure that a+b=c
i cannot emphasize enough to MAKE SURE YOUR FINGERS ARE NOWHERE NEAR THE BLADE WHEN CUTTING , i haven't had any accidents and i don't want to so be wary, please
hope this helps and let me know if you need some more explanation