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« on: June 30, 2020, 01:04:30 AM »
Generally, problems such as this (assuming you have thoroughly checked all couplings for tightness and slides are not binding, etc) are caused by loss (or gain) of steps.
If you attach your <your profile>.xml file (Mach3 folder) we can check your Mach3 settings and perhaps suggest a solution. Rename your .xml file to a unique name such as lutmfurl.xml before posting.
Tweakie.