I have been cutting lots of items out of 1/2” hdpe for last few months and updated feed and speeds based on feedback here as well as from Amana and tools today. Everything was working great and then today I started cutting same file same bit etc but you could tell something was running rougher than normal. The first cut looked normal where chips flew out and then when it went for next pass they just starting packing into the tool path. I took some photos of how the pieces looked after and the chips just packed onto piece so tight I had to scrape them off. Any ideas on what could cause this? It it machine related or router or material? Very odd given how nice other pieces have been cutting.
Thanks for any advice in advance.