Max feed rate for steppers.

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This topic contains 2 replies, has 2 voices, and was last updated by  Dave S 2 months, 1 week ago.

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  • #105875

    Dave S
    Participant

    Howdy.  Wondering a couple things.  Is there a firmware limit on max feed rate?   Or a physical limit on the steppers / overall machine build?   I’m running the standard kit from V1 with a full rambo with dual endstops.    I’m cutting PVC foam board (Azec) and it seems like I need to go fast to avoid melting.  I pushed it to 150 ipm (64 mm/s) and it seems to work ok, but I think wants to go faster.

    #105877

    Ryan
    Keymaster

    What type of endmill? Single flute is what you should be using, each flute doubles the speed you need to go.

    Is there a firmware limit on max feed rate? Or a physical limit on the steppers / overall machine build?

    Yes, Both. the firmware is set at 100-120 XY, Z is 10-30. At those speeds you have very little torque left. You can either cut deeper , lower your RPM, change endmills, or change to larger pulleys.

    #105878

    Dave S
    Participant

    Understood.    The FW limit must be why the speed increases I tried didn’t really feel like a big boost.    I was using a single flute upcut as well as a solid 90 deg v-bit.    I’ll bring down the speed of my router too and see if it cleans it up some more.   Thanks for being quick to respond!

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