We in our lab want to utilize the openflexure microscope for experiments. Our goal is to print
several of them to run a lot of experiments in parallel.
To test the microscope we first assembled one to test it. We got some problems with the Nano, but after
switching to the Uno everything works fine now.
Except that the actuator movement is somehow restricted. The movement direction that is caused by pulling up the screw nut works fine and we get the full 6 mm range of motion. The other direction however is restricted. It seems that the O-Ring has not the power to pull down the actuator. Instead, the screw with the gear gets pushed out.
I assume we use the recommended o-rings with inner diameter of 30 mm and a thickness of 2 mm with a hardness of 80.
Link to the o-ring: O-ring 30x2 - FKM - FPM - Viton - 80 Shore A - Black - ORS23647 - O-ring-stocks.eu O-Ring Webshop
Everything was printed with the recommended settings.
So far we do not understand why this is the case. Does anyone here have an idea to solve this issue?
Thanks in advance