04-01-2020, 07:21 PM
Thanks for the helpful ideas everyone. At the moment I think I have fixed it, though time will tell.
Checking alignment of pulleys with a straight edge I found the front faces of the pulleys are aligned, but not the back. The top pulley is wider and could take a wider belt, so alignment depends on where the belt runs within the wider pulley. If the belt was to run towards the front of the top pulley all would be good, but it always seems to run towards the back of the top pulley, and then the belt works its way onto the edge flange of the lower pulley.
Interesting the suggestion of having the belt slacker. So I slackened the adjustment even slacker than I had tried earlier. Yay! The belt now runs towards the front of the top pulley, but not against the edge flange, and the belt rides correctly on the lower pulley.
Thanks again.
Checking alignment of pulleys with a straight edge I found the front faces of the pulleys are aligned, but not the back. The top pulley is wider and could take a wider belt, so alignment depends on where the belt runs within the wider pulley. If the belt was to run towards the front of the top pulley all would be good, but it always seems to run towards the back of the top pulley, and then the belt works its way onto the edge flange of the lower pulley.
Interesting the suggestion of having the belt slacker. So I slackened the adjustment even slacker than I had tried earlier. Yay! The belt now runs towards the front of the top pulley, but not against the edge flange, and the belt rides correctly on the lower pulley.
Thanks again.