Tool settings for HDPE


I’m trying to make sense of the automatic tool settings for HDPE. The settings that CC calculate don’t seem to match any of the feeds and speeds charts for Shapeoko 3.

Here’s the tool setting for a 1/4" end mill for HDPE:

The values for feedrate and RPM seem to be off. Does this make sense?

These look like the settings for the Nomad.

Yes, I’m afraid that Carbide Create doesn’t (yet) do a very good job of calculating feeds and speeds for Shapeokos — please use the official chart:

and if you need to use some other endmill work up appropriate feeds and speeds:

Hoping to find time to do some experiment this weekend.