X-Axis Belt Running Onto Bearing

"However, the mounts for the bearings are fixed in place by the manufacturer, they are not adjustable."

If this is true, then the assumption has been made by a Manufacturer that this is ‘sufficiently aligned’ and ‘shouldn’t be a problem’. The belt attempting to leave seems to demonstrate otherwise. :slight_smile: I can’t imagine the pulley holders having fixed positions with dowel pins. The bolt holes likely allow some bolt clearance and hopefully a minor adjustment can be wrestled out of them.

Find a stiff stick, a bbq skewer, a piece of bar stock, tubing; something rigid that you can fit between the pulleys to use as a gauge. With the belt in place ( or out of place as shown ) begin to cut down the gauge to fit between the raised outer edges or ridges of the pulleys. As you sneak up on the correct size, one side of the pulleys will ‘fit’ before the other. At this point you’ll have a sense of the misalignment. Keep trimming until you’re on size on the closer ridges. Then put the gauge back in the ‘Loose Side’ and measure the small gap. This is how I set the toe-in on my 4x4. :laughing: I’ll keep that stick for next time. Hopefully this will show .020" or .030" inch and you can attack it from there. A friend recommended a single telescoping tent pole or a monopod leg that extends to the gauge length and can be locked.

Do the bolts seem to work or shake loose?