Hi @roryaronson, To answer your questions:
-
We plant our veggies using a quick water jet from the Farmbot to indicate the exact position where each seed needs to go according to Farm Designer
-
The calibration issue became apparent last week when I installed a replacement USB camera (the original was defective) and tried to stitch pictures for the first time. The stitching was not very good. In the following thread (How to adjust “stitching” to get a better FB selfie), @jrwaters suggested that I should make sure that moving 100mm in Farm Designer resulted in an actual move of 100mm. That’s when I realised that I have a problem
-
Like you, I don’t think that belt stretch is an issue as the error margin is in the range 5-8%
Not being able to stitch properly is not the end of the world but it would be nice if we had a good method to calibrate the machine as I am not sure how effective weeding is going to be if chunks of the vegetable patch are missing from the pictures.