I have read a ton on the calibration, but have a few questions I couldn’t find exactly as I have going on.
First, when using the chain to measure motor spacing, I fed the chain out, connected the two motors by the chain as pictured, and withdrew until there was about 1" sag at the middle of the chain. The pull tight command did not pull the chain significantly tighter. I redid this set and manually made the chain much tighter and ended up with a motor spacing measurement about 10mm less. Should the motors have made the chain taught for the measurement? If not I may repeat and try to make it even tighter.
Second, I am having issues (I think) with the sprocket alignment. In the early steps of calibration I aligned the sprocket on each motor to 12:00. In the later stage of the calibration (after motor spacing measurement) when it asks for the sprockets again to be aligned to 12:00, I hit the automatic button and it did not go to 12:00. Does this indicate something wasn’t done correctly or didn’t save a correct value?
Also, after feeding out chain of 2032mm, the left motor appeared to be back at 12:00, but the right motor was far off. 2032mm should be 32 full revolutions of 63.5mm, so I expected the sprocket to end up back where it was. Is this also an indicator something went wrong? Best place to look to fix it?