Manually Calculating Steps Per

If your motor tuning calibration (steps per) is set, but still slightly off, you can make adjustments without having to re-check actual distance.  At this point you would know how far off you are over how much distance, so you can calculate the steps per adjustment needed. For example, if you cut a 5" part but it is measuring 5.012" than you can do one of the following:

  1. Run the calibration wizard, but no need to actually verify the distance traveled as you already know the settings.  Enter the distance to move as 5" (use your actual commanded distance). Once it completes the move and prompts for how far it actually moved, enter 5.012" (use your actual measured distance).
  2. *Use the attached StepsPer-Calculator worksheet to enter your commanded distance, actual distance, and current steps per value. The new steps per value will be listed for you to update your steps per value to. You can use the .xlsx file if you have Microsoft Excel software, or use the Google Sheet for online access.
  3. *You can do math on the steps per value listed. In our example, we are off by .24 percent (.012/5=.0024 or .24%).  So if the steps per are 50,000 then you would change steps to 49880 (50,000 - .24%).
    • If the parts are too big, then you need to reduce the steps per. If the parts are too small, then you need to increase the steps per.

*NOTE: You can adjust the steps per value directly. For Mach3, this is in the config->motor tuning menu (then select the axis needed to change)(be sure to click the save axis settings button when the change is made for an axis). For Mach4 it is in the configure->mach... menu and then the motors tab (then click on the word for the motor you need to adjust).  

Be sure to verify your distances again after using any of these adjustments to ensure accuracy and that no mistakes in data were accidentally made.


Revision #6
Created Tue, Dec 26, 2017 8:50 AM by Dan
Updated Fri, Jul 26, 2019 4:44 PM by Dan