I don't know for sure what you are experiencing, but I do know the weight of the quilt causes drag for me and I have to stop alot and reposition the quilt. The quilt gets hung up pulling and pushing - both ways. Mainly because I don't have a good set up. Some people hear have shown their set ups that are awesome. PVC pipes holding up the quilt. Some day I may get to try that. I have also found that I don't use the pedal any more. I could not stay consistent with my speed using my foot. I use the on off button - then the speed is consistent.