We are having an issue with a loss of suction for our needle on our Farmbot. The needle suction is not powerful enough to reliably pick up the pelleted seeds for planting. We have verified the air pump itself is working properly and providing sufficient pressure, we have installed a fuel filter inline for the pump hosing (to prevent dirt pickup from clogging the pump diaphragm), and we have verified that there is strong positive pressure up to the magnetic coupling for the system.
We believe that the pressure loss is happening with the needle attachment for the magnetic coupling, but we have not been able to verify that this is the case. We have also use plumber’s tape to provide a better seal where the clear, plastic piece screws into the magnetic coupling, to no avail. Can anyone provide advice or direction for solving this issue?
Thank you in advance!