My lab has had an evolver for about a year but we haven’t been using the turbidostat mode regularly. I’m trying to get the turbidostat mode back up and running but a few of the pumps will pull on the inner silicon tubing and push it through causing the connection between the silicon tubing and the longer media line to break, spilling media everywhere. When this happens I have to open up the pump housing and readjust the silicon tubing but even after I do this it still seems to pull and will eventually have the same problem. I’m afraid to run very long experiments right now because I expect the tubing will eventually split and spill media/culture everywhere when I’m not around to fix it.
Has anyone else had this problem and are there any suggestions for how to fix it? I checked the adafruit forums but there doesn’t seem to be anyone with my same problem there (this pump is adafruit product 1150). Adafruit seems to claim that these peristaltic pumps don’t need lubricant. My two first thoughts for how to fix this would be (1) apply some lubricant (2) replace the silicon tubing (maybe it’s too old from sitting for a year?). Or maybe someone else has experience with this? Is it possible I’m putting the pump together incorrectly and priming it for this behavior?