The X axis stepper motor has these two metal wheels that guide the belt over the gear on the stepper motor and ride on the X gantry. Even though I do not think I have my belt very tight they are cutting a groove alongside the lip where the wheels ride. I noticed this when there were a bunch of aluminum shards and flakes under the belt. Besides the belt being too tight which I don’t think it is is there something else I should check?
Remove each idler wheel and use a small tool to clear the powder coat, and if need be enlarge the top of the hole a bit — some folks grind off a bit of the flange, but usually just clearing the powder coat is sufficient.
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