I am not able to mill on soft poplar plywood with a thickness of 1 cm.
I used this sheet for milling:
and this milling bit from amazon:
I tried different settings for forward speed, depth per pass and rpm on the router. However, I was not able to get a clean cut on the poplar sheet.
I tried the following combinations on rectangular test cuts:
18000 - 24000 rpm (number 3 - 4 on router), 1000 - 2000mm forward speed, 3 mm depth per pass (several tests with different combinations of the aforementioned settings): cut went mostly ok, but the bit burned and left burns on the wood, sometimes small sparks could be seen.
18000 rpm (number 3 on router), 1500 mm forward, 5 mm depth per pass: I tried this setting because I wanted to increase chip load on the bit (mitigate the burnings and cool the bit) - however the cut failed completely, with Goliath moving away from its track - have a look at the following pictures:
I then wanted to cut the actual project, a big squirrel, but the cut also failed, although I used settings which worked ok before → 18000 rpm (number 3), 1500 mm forward speed, 3 mm depth per pass.
You can see that the cut started out good, no burnings can be seen. but after a while the wood started burning and in the end Goliath lost its track and gave me an “obstacle on the surface” error.
I continued the cut several times, but the machine was not able to continue.
I also shot a video of the process - Goliath trying to mill the sheet, loosing its track and starting to shake
goliath.zip (2.2 MB)
I don’t why it seems to be hard for Goliath to mill soft woods - I had good experiences with hard wood (beech), so I thought that milling poplar shouldn’t be an issue
Did anyone have similar experiences and can give me advice to my problem? Which bit to use and the correct settings therefor?