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  1. 23-03-2016 #1
    Davek0974's Avatar
    Lives in Bishops stortford, United Kingdom.
    Davek0974
    Last Activity: 09-02-2022 Has been a member for 8-9 years. Has a total post count of 1,165. Received thanks 78 times, giving thanks to others 226 times.
    Has anyone achieved linearity between Mach3 PWM signal and a VFD spindle??

    My VFD display matches the actual spindle pretty closely as checked with a laser tacho.

    When i request 24,000rpm, I get it, when I request 10,000rpm i get something like 8,000 instead - it's not a linear scale so need calibrating.

    I know it can be done, using the motor steps-per & velocity plus the spindle pulley settings but I cant find any concrete way of how its done.
    Last edited by Davek0974; 23-03-2016 at 08:21 PM.
    https://ddmetalproducts.co.uk
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