Spindle speed for large diameter parts

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Thread: Spindle speed for large diameter parts

  1. #1
    OlioMk's Avatar
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    Default Spindle speed for large diameter parts

    Hi.
    I am new into CNC Turning and i would like to ask about Spindle speed for large or massive parts.
    We have a two axis CNC HAAS ST30.
    So, if manufacturer of the tool inserts recommends minimal cutting speed of 244 m/min and i need to do face operation from 20 mm to 300 mm accross x axis (let say at Z=-1 mm), how to setup spindle speed in this situation? If i calculate N , at max value of x , which is 300 mm, i will have spindle speed of 260 1/min but same calculation at min x value of 20 mm will produce result of 3885 1/min. First, we don't have that much speed on our machine and second, not safe to turn hevy part at that rate. We are using G50 and G96 in our code.
    What to do in order to have good chip breaking and stable work conditions?



  2. #2
    Community Moderator Jim Dawson's Avatar
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    Default Re: Spindle speed for large diameter parts

    Keep in mind that the insert manufacturer recommended speeds are suggestions for best results, but not hard rules. What I do is set G50 to the maximum allowable speed for the operation, and just run it. If you have G99 (Feed / Rev) it might be useful in this case.

    Jim Dawson
    Sandy, Oregon, USA


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Spindle speed for large diameter parts

Spindle speed for large diameter parts

Spindle speed for large diameter parts