Error message during uploading Arduino

[madgrizzle]

@sarham6

Everything go smoothly but the distance between motors = -12.7 mm

Read this post completely… I suspect you aren’t doing this step correctly… don’t worry, you wouldn’t be the first:

How To: Get Calibrated!

Step 5: Measuring Distance Between Motors [image] Out of all the steps, this one causes people the most problems… and it’s really not that hard. The first thing to do is to READ THE INSTRUCTIONS… ALL OF THEM Regardless of how you plan to deal with the slack of the chain (over-top feed or under-bottom feed), you will do the distance measurement just like shown: Place the first link of the left chain on the left sprocket as shown on the image on the left. Press the “Extend” button. The left…