[Solved] Optical sensor failure?
Part the way through a run today the optical sensor stopped working. At the same time it appears the stepper motor that positions the filament across the spool stopped as well. Thus the diameter was mot controled and the filament bunched up in the centre of the spool.
Any thoughts on what I need to do to fix it?
A bit more troubleshooting has found that the stepper motor that positions the filament across the spool goes through its normal zero position setup at extrusion start but once you start the spooling it no longer moves.
Still no joy with the optical sensor. Is the optical sensor some how coupled to the stepper motor that positions the filament on the spool?
Thank you for your question about the filament sensor and the positioner.
The filament sensor is not connected to the stepper motor of the positioner. The positioner should normally just work. However, you have to press 'Start Spooling' via the menu.
About the filament sensor, there are a number of reasons why it wouldn't work;
- There is too much light in the filament sensor. Have you closed the Filament Maker’s door? Is the machine placed under too much light? Have you ever tried to move and extrude the machine with the door closed (and possibly the light off)? Or even a darker room?
- The sensor is dirty. You can carefully pick up a cloth between the glasses through which the filament passes, to clean the sensor.
- Is the filament running correctly/straight true the filament sensor? Is the tension good? Make sure that the filament sensor only sees the filament (well) when it is completely in the curve (back end) of the filament sensor. Otherwise it is out of range.
- If the above points do not help, it is possible that the cables are not connected correctly in the filament sensor or the connector is not correctly inserted into the pcb (Devoboard).
If non off the above points work you can carefully remove the glass lenses. If you send a email to email@example.com I can share you a manual how to take these out and clean.
Hope this helped.
I have just checked the 2 glass plates in the optical sensor and they were quite dirty. I have cleaned them and I am waiting for the extruder to heat up. I will let you know the outcome.
Good news on both issues. The optical sensor is working again as is the positioner. So although you stated they are not related it seems that they are somehow related.
All is now working as it should Thank you for the assistance.