Had a customer argue with me about feed rates on a Haas VF-2 last Tuesday

Guy comes in with a part print, tells me to run his aluminum job at 200 IPM with a 1/2 endmill. I said that's going to chatter bad on that machine. He insisted he ran it before. I showed him the manual specs and gave him a test cut at 120 IPM instead. It came out clean, he shut up. Anyone else deal with customers who think they know your machine better than you do?

3 comments

3 Comments

jordan_webb29d ago

Wait, did he actually show you his previous setup or just claim he ran it?

richard_anderson29d ago

Been there, done that - I once argued with a guy about feeds and speeds until I realized I was wrong and he was right. Talk about eating crow while your chip load calculations are all over the floor.

mila_harris29d ago

@richard_anderson that reminds me of the time I argued with a machinist about tool wear patterns and he just handed me a dull endmill to check for myself. Nothing like holding a ruined cutter to shut you right up lol