I would use the Maslow calculated value (if you followed directions carefully). If you use the Maslow value and still have issues, you can manually change this distance to the tape measured values and retest to see if the problem is solved.
If you believe that your tape readings are better I recommend that you make certain that you measure from the center of motor shaft to center of motor shaft and that the tape does not have slack in it.
This is a quite common occurrence⌠in fact, I donât know that anyone has a machine measured distance equal to their hand measured distance. I canât say which is âbetterâ to use, but @Sreenigneâs advice is reasonable.
I personally wouldnât trust my measuring skills, I left that up to the computer. May I ask how big a difference your getting between the tape measure and the computer measurements? If itâs a lot then there might be an issue but also keep in mind that if your using a frame with a top beam there is likely going to be some flex that you wouldnât get when hand measuring.
The one thing that messed me up on that step is I wasnât taking the slack out of the chain before measuring it. Make sure to do that and get it as close to tight as you can just donât let the chain pull so much your flexing your top beam.
To correct oval circle, I changed the distance of the motors in the ground control.