🚧	This is very much likely to change - I'm still learning every day!

I used a 500W china spindle for my tests.

Plexiglas (PMMA)

Melts at 160°C (even earlier than your printer's PLA or PETG).

These are the main challenges:

Make sure the chips leave the flute so they can't friction weld (dust shoe, compressed air)
Finding the highest cutting volume (diameter*speed*attack) while keeping the tool as cool as possible

cutter	diameter (mm)	speed (mm/min)	plunge (mm/min)	attack (mm)	rpm	cooling	notes
single-flute	2.0	300	30	0.5	10,000	none	Great result, more should be doable!
single-flute	2.0	400	30	0.75	10,000	none	Looks good, might be the limit before it shows.
single-flute	3.175	100	50	0.5	10,000	none	Looks okay, but seems to be the limit. 300mm/min also tested, PMMA was melting.
single-flute	3.175	80	50	1.0	10,000	none	Looks okay, but seems to be the limit. (Attack 2.00 Speed 100 failed miserably with melting)

Cutter diameter of 2.00mm seems to be the most viable method - maybe trying hiher speed is an option?

Engraving

0.5mm deep TBD TBD

cutter	diameter (mm)	speed (mm/min)	attack (mm)	plunge (mm/min)	rpm	cooling	notes
single-flute	2.0	300	30	2.0	10,000	none	Great result, more should be doable!

cutter	diameter (mm)	speed (mm/min)	attack (mm)	plunge (mm/min)	rpm	cooling	notes
single-flute	2.0	400	2.0	100	10,000	none	Works out fine, more speed should be possible.

cutter	diameter (mm)	speed (mm/min)	attack (mm)	plunge (mm/min)	rpm	cooling	notes
single-flute	3.175	500	0.75	80	10,000	none	Works out fine, more speed should be possible.
single-flute	3.175	555	1.00	127	10,000	none	Works out fine, more speed or attack should be possible.
single-flute	3.175	555	2.00	127	10,000	none	Works out fine, more speed or attack should be possible.

GCode created with LaserWeb4.

Left
- Cutting speed: 555mm/min
- Attack: 1.00mm
Left
- Cutting speed: 555mm/min
- Attack (only outer cut, inner are done with 1.00mm): 2.00mm