This past week my SP-15 has started making a whining/humming when I move the carriage forward. It happens in both trip and print although it sounds a little more dramatic in print. I have oiled everything I can possibly think of to put oil on and it makes no difference. This also happens when the rollers are up, so I have ruled out that it has anything to do with those. I can’t see any issues with any of the wheels, but it is a little hard to see while everything is moving. Here are two videos I took that have the noise. It starts about 1/3rd of the way down the press bed.
Thank you for taking a look!